.page-about {
  --about-rule: 1.5px dashed var(--line-strong);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .breadcrumb {
  padding-top: clamp(14px, 3vw, 26px);
}

/* 首屏 */
.page-about .about-intro {
  padding-block: clamp(18px, 3vw, 36px) clamp(34px, 5vw, 64px);
}

.page-about .about-intro__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-intro h1 {
  margin: 14px 0 18px;
  font-size: clamp(1.95rem, 6vw, 3.25rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--green);
}

.page-about .about-intro__text {
  max-width: 34em;
  font-size: clamp(1rem, 1.9vw, 1.06rem);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-intro__text + .about-intro__text {
  margin-top: 14px;
}

.page-about .about-facts {
  margin: 0;
  padding: 6px 20px 10px;
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-paper);
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__row:last-child {
  border-bottom: 0;
}

.page-about .about-facts dt {
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--green);
  background: var(--slate-pale);
  border-radius: var(--radius-s);
  padding: 2px 9px;
  white-space: nowrap;
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.78fr);
    gap: clamp(30px, 4.5vw, 64px);
  }
}

/* 起点章节 */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-origin__text p {
  color: var(--ink-soft);
}

.page-about .about-origin__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-origin__list li {
  position: relative;
  padding-left: 24px;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-origin__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--orange-soft);
  border: 1.5px solid var(--pine);
}

.page-about .about-origin__figure {
  margin: 0;
  transform: rotate(-0.6deg);
}

.page-about .about-figcap {
  display: block;
  margin-top: 12px;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--slate-deep);
}

.page-about .about-figcap .mono-batch {
  margin-right: 6px;
}

@media (min-width: 880px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-origin__figure {
    margin-top: clamp(20px, 4vw, 56px);
  }
}

/* 三栏说明 */
.page-about .about-layout__grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
  align-items: center;
}

.page-about .about-triad {
  display: block;
  width: 100%;
  height: auto;
  background: var(--cream);
  border-radius: var(--radius-m);
}

.page-about .about-layout__cols {
  display: grid;
  gap: 16px;
}

.page-about .about-col {
  padding: 16px 18px;
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--pine);
  border-radius: var(--radius-s);
}

.page-about .about-col h3 {
  margin: 10px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: -0.01em;
}

.page-about .about-col p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-layout__note {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 18px 22px;
  max-width: 44em;
  background: var(--paper);
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ink);
}

@media (min-width: 900px) {
  .page-about .about-layout__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }

  .page-about .about-triad {
    position: sticky;
    top: 96px;
  }
}

/* 三个动作 */
.page-about .about-flow__grid {
  display: grid;
  gap: 20px;
  align-items: start;
}

.page-about .about-flow__step {
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--white);
  border: 1px solid var(--line-strong);
  outline: 1px solid var(--line);
  outline-offset: 3px;
  border-radius: var(--radius-m);
  box-shadow: 5px 5px 0 -1px var(--paper), 5px 5px 0 0 var(--line-strong);
}

.page-about .about-flow__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--green);
  background: var(--orange-soft);
  padding: 2px 8px;
  border-radius: var(--radius-s);
}

.page-about .about-flow__step h3 {
  margin: 14px 0 10px;
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--green);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-flow__foot {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
  margin-top: clamp(30px, 4.5vw, 52px);
  align-items: start;
}

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

.page-about .about-flow__rhythm h3 {
  margin: 0 0 14px;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--green);
}

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

.page-about .about-rhythm-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-rhythm-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

@media (min-width: 820px) {
  .page-about .about-flow__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-flow__step:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-flow__step:nth-child(3) {
    margin-top: 52px;
  }

  .page-about .about-flow__foot {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

/* 团队分工 */
.page-about .about-team__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-team__group {
  padding: 18px 16px 20px;
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--pine);
  border-radius: var(--radius-s);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-team__group:hover {
  transform: translateY(-2px);
  border-color: var(--orange);
  border-top-color: var(--orange);
}

.page-about .about-team__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--slate-deep);
}

.page-about .about-team__group h3 {
  margin: 10px 0 4px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--green);
}

.page-about .about-team__count {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-team__group p:last-child {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-team__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--slate-deep);
}

@media (min-width: 640px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1020px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

/* 时间线 */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 37px;
  top: 8px;
  bottom: 22px;
  border-left: var(--about-rule);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: clamp(22px, 3vw, 32px);
  align-items: start;
}

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

.page-about .about-timeline__year {
  position: relative;
  z-index: 1;
  display: block;
  padding: 4px 0 5px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--green);
  background: var(--white);
  border: 1.5px solid var(--green);
  border-radius: var(--radius-s);
}

.page-about .about-timeline__body h3 {
  margin: 2px 0 8px;
  font-size: 1.06rem;
  font-weight: 800;
  color: var(--green);
  line-height: 1.4;
}

.page-about .about-timeline__body p {
  margin: 0 0 10px;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40em;
}

@media (min-width: 820px) {
  .page-about .about-timeline__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-timeline::before {
    left: 47px;
  }
}

/* 合作与保障 */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-partners__text .section-head__title {
  margin-bottom: 16px;
}

.page-about .about-partners__text p {
  max-width: 34em;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-partners__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 18px 20px;
  display: grid;
  gap: 12px;
  background: var(--paper);
  border-radius: var(--radius-m);
}

.page-about .about-partners__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-partners__figure {
  margin: 0;
  max-width: 420px;
}

@media (min-width: 860px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
  }

  .page-about .about-partners__figure {
    justify-self: end;
  }
}

/* 下一步入口 */
.page-about .about-next__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-next__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 20px 22px;
  text-decoration: none;
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  box-shadow: 4px 4px 0 -1px var(--paper), 4px 4px 0 0 var(--line-strong);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--orange);
}

.page-about .about-next__kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate-deep);
}

.page-about .about-next__card strong {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--green);
  padding-right: 28px;
}

.page-about .about-next__arrow {
  position: absolute;
  right: 18px;
  bottom: 18px;
  font-size: 1.1rem;
  color: var(--orange);
}

@media (min-width: 760px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__group,
  .page-about .about-next__card {
    transition: none;
  }

  .page-about .about-team__group:hover,
  .page-about .about-next__card:hover,
  .page-about .about-next__card:focus-visible {
    transform: none;
  }
}