.page-about {
  --about-ink-soft: #4a3d35;
  --about-pad: clamp(16px, 2.6vw, 28px);
}

.page-about [id] {
  scroll-margin-top: 92px;
}

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

.page-about .breadcrumbs {
  padding-top: clamp(14px, 3vw, 24px);
  padding-bottom: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(14px, 2.6vw, 26px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(20px, 4vw, 38px);
  align-items: start;
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(30px, 6vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-hero__accent {
  position: relative;
  display: inline-block;
  color: var(--blue);
}

.page-about .about-hero__accent::after {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  bottom: -0.05em;
  height: 0.11em;
  background: var(--orange);
  transform: skewY(-1.6deg);
  border-radius: 2px;
}

.page-about .about-hero__intro {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .about-hero__actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-side {
  padding: 18px 18px 20px;
  background: var(--paper-2);
  border: 1px solid var(--hair);
  border-top: 3px solid var(--orange);
  clip-path: var(--cut-poly);
}

.page-about .about-jump {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-jump a {
  display: block;
  padding: 9px 10px 9px 14px;
  border-left: 2px solid var(--warm);
  font-size: 14px;
  line-height: 1.4;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--orange);
  background: var(--orange-soft);
  transform: translateX(3px);
}

.page-about .about-side__meta {
  margin: 16px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-about .about-hero__media {
  margin-top: clamp(20px, 4vw, 38px);
}

/* ---------- 规模数字 ---------- */
.page-about .about-stats {
  padding-top: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(10px, 2vw, 20px);
}

.page-about .stats-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  clip-path: var(--cut-poly);
}

.page-about .stat {
  display: grid;
  align-content: start;
  gap: 3px;
  padding: 15px 14px 17px;
  background: var(--paper-2);
}

.page-about .stat__num {
  font-size: clamp(26px, 4.4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  letter-spacing: -0.02em;
}

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

.page-about .stat__note {
  font-size: 12px;
  line-height: 1.55;
  color: var(--slate);
}

/* ---------- 定位 ---------- */
.page-about .about-block__grid {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-about .about-block h2,
.page-about .about-team h2,
.page-about .about-principles h2,
.page-about .about-release h2 {
  margin: 8px 0 0;
  font-size: clamp(23px, 3.4vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 800;
}

.page-about .about-block__body p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-ink-soft);
  max-width: 62ch;
}

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

/* ---------- 生产流程 ---------- */
.page-about .about-flow {
  padding-top: clamp(30px, 5vw, 54px);
  padding-bottom: clamp(30px, 5vw, 54px);
}

.page-about .about-flow__grid {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 28px);
}

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

.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  counter-reset: flow;
  order: 1;
}

.page-about .flow-list > li {
  position: relative;
  counter-increment: flow;
  padding: 16px 18px 18px 54px;
  background: var(--paper-2);
  border: 1px solid var(--hair);
  border-left: 3px solid var(--orange);
}

.page-about .flow-list > li::before {
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .flow-list strong {
  display: block;
  font-size: 15px;
  color: var(--ink);
  margin-bottom: 5px;
}

.page-about .flow-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

/* ---------- V3.1 改版 ---------- */
.page-about .about-release {
  background: linear-gradient(155deg, var(--blue) 0%, var(--blue-2) 100%);
  color: var(--paper);
  padding-top: clamp(34px, 6vw, 70px);
  padding-bottom: clamp(34px, 6vw, 70px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-release h2 {
  color: var(--paper);
}

.page-about .eyebrow--light {
  color: var(--teal);
}

.page-about .about-release__lede {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 235, 221, 0.78);
}

.page-about .about-release__grid {
  display: grid;
  gap: clamp(20px, 4vw, 32px);
  margin-top: clamp(22px, 3.5vw, 34px);
  align-items: start;
}

.page-about .about-release__media {
  margin: 0;
  border: 1px solid rgba(244, 235, 221, 0.16);
  clip-path: var(--cut-poly);
  overflow: hidden;
}

.page-about .about-release__media img {
  width: 100%;
  object-fit: cover;
}

.page-about .release-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .release-points > li {
  padding: 15px 16px 17px;
  background: rgba(244, 235, 221, 0.06);
  border-left: 2px solid var(--teal);
}

.page-about .release-points h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.01em;
}

.page-about .release-points p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(244, 235, 221, 0.84);
}

.page-about .about-timeline {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: clamp(14px, 2.4vw, 22px);
  border: 1px solid rgba(244, 235, 221, 0.16);
  clip-path: var(--cut-poly);
}

.page-about .about-timeline svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline text {
  font-family: var(--sans);
}

.page-about .about-timeline figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(244, 235, 221, 0.7);
}

/* ---------- 团队 ---------- */
.page-about .about-team__intro p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink-soft);
  max-width: 60ch;
}

.page-about .team-cards {
  list-style: none;
  margin: clamp(20px, 3.5vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .team-cards > li {
  padding: 16px 18px 18px;
  background: var(--paper-2);
  border: 1px solid var(--hair);
  border-top: 2px solid var(--blue-2);
}

.page-about .team-cards__num {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .team-cards h3 {
  margin: 6px 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-cards p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

/* ---------- 版本记录 ---------- */
.page-about .about-changelog {
  padding-top: clamp(28px, 5vw, 50px);
  padding-bottom: clamp(28px, 5vw, 50px);
}

.page-about .about-changelog .pill-bar {
  margin-top: 14px;
}

.page-about .about-changelog__status {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-about .clog {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .clog__item {
  display: grid;
  gap: 5px;
  padding: 14px 16px 16px;
  background: var(--paper-2);
  border: 1px solid var(--hair);
  border-left: 3px solid var(--blue-2);
}

.page-about .clog__ver {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--blue);
}

.page-about .clog__mod {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .clog__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

/* ---------- 内容原则与联系 ---------- */
.page-about .about-principles__grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  align-items: stretch;
}

.page-about .about-principles__card {
  padding: clamp(18px, 3vw, 28px);
  background: var(--paper-2);
  border: 1px solid var(--hair);
  clip-path: var(--cut-poly-lg);
}

.page-about .principle-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .principle-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

.page-about .principle-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-about .about-principles__cta {
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(160deg, var(--blue) 0%, var(--blue-2) 100%);
  color: var(--paper);
  clip-path: var(--cut-poly-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-about .about-principles__cta h2 {
  color: var(--paper);
  margin-top: 0;
  font-size: clamp(21px, 2.8vw, 30px);
}

.page-about .about-principles__cta p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(244, 235, 221, 0.82);
  max-width: 48ch;
}

.page-about .about-principles__actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .stats-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.82fr);
    column-gap: clamp(32px, 5vw, 72px);
  }

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

  .page-about .about-block__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    column-gap: clamp(32px, 6vw, 84px);
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
    column-gap: clamp(32px, 5vw, 60px);
  }

  .page-about .about-flow__media {
    order: 1;
    margin-top: 30px;
  }

  .page-about .flow-list {
    order: 2;
  }

  .page-about .about-release__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    column-gap: clamp(30px, 4.5vw, 56px);
  }

  .page-about .about-team__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    column-gap: clamp(32px, 5vw, 68px);
    align-items: start;
  }

  .page-about .team-cards {
    margin-top: 0;
  }

  .page-about .clog__item {
    grid-template-columns: 74px 66px minmax(0, 1fr);
    align-items: baseline;
    column-gap: 16px;
  }

  .page-about .about-principles__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }
}

@media (min-width: 1120px) {
  .page-about .team-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-block__body p {
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump a {
    transition: none;
  }

  .page-about .about-jump a:hover,
  .page-about .about-jump a:focus-visible {
    transform: none;
  }
}