/* =============== about · 叙事纵深 =============== */

.page-about {
  --about-bar: clamp(48px, 8vw, 96px);
  --about-team-a: 1fr;
}

/* ---------- 深墨斜切开场 ---------- */
.page-about .about-open {
  position: relative;
  isolation: isolate;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: calc(var(--section-y) * 1.05) 0 calc(var(--section-y) * 1.5);
  overflow: hidden;
}

.page-about .about-open::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: var(--about-bar);
  background: var(--color-surface);
  clip-path: polygon(0 0, 0 100%, 100% 100%);
  z-index: 3;
  pointer-events: none;
}

.page-about .about-open__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.page-about .about-open__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-about .about-open__body {
  position: relative;
  z-index: 2;
}

/* 面包屑 */
.page-about .about-open__crumbs {
  margin-bottom: var(--space-6);
}

.page-about .about-open__crumbs .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.page-about .about-open__crumbs .breadcrumbs__item {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-about .about-open__crumbs .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: var(--space-2);
  opacity: 0.45;
}

.page-about .about-open__crumbs .breadcrumbs__link {
  color: var(--color-contrast-accent);
  text-decoration: none;
}

.page-about .about-open__crumbs .breadcrumbs__link:hover,
.page-about .about-open__crumbs .breadcrumbs__link:focus-visible {
  text-decoration: underline;
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-about .about-open__eyebrow {
  color: var(--color-contrast-accent);
  letter-spacing: 0.14em;
}

.page-about .about-open__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  margin: var(--space-2) 0 var(--space-4);
  max-width: 22ch;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-open__lede {
  max-width: 62ch;
  color: var(--color-contrast-ink);
  opacity: 0.9;
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-about .about-open__facts {
  list-style: none;
  padding: 0;
  margin: var(--space-6) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-about .about-open__fact {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
}

.page-about .about-open__fact .mono {
  color: var(--color-contrast-ink);
  opacity: 0.62;
  letter-spacing: 0.08em;
}

.page-about .about-open__fact strong {
  color: var(--color-contrast-accent);
  font-weight: var(--weight-heading);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-top: calc(var(--section-y) * 0.5);
}

.page-about .about-origin__grid {
  align-items: start;
}

.page-about .about-origin__aside {
  position: relative;
}

.page-about .about-origin__title {
  margin-top: var(--space-2);
}

.page-about .about-origin__mark {
  display: block;
  width: 72px;
  height: 72px;
  margin-top: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-primary);
}

.page-about .about-origin__copy p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  color: var(--color-ink);
  line-height: var(--leading-body);
}

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

.page-about .about-origin__cta {
  margin-top: var(--space-4);
  display: inline-block;
}

/* ---------- 六大类别 ---------- */
.page-about .about-cats {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-about .about-cats .section-title {
  color: var(--color-primary-ink);
}

.page-about .about-cats .eyebrow {
  color: var(--color-primary-ink);
  opacity: 0.72;
  letter-spacing: 0.14em;
}

.page-about .about-cats__top {
  align-items: start;
  margin-bottom: var(--space-8);
}

.page-about .about-cats__lede {
  max-width: 56ch;
  margin-top: var(--space-3);
  color: var(--color-primary-ink);
  opacity: 0.88;
  line-height: var(--leading-body);
}

.page-about .about-cats__figure {
  margin: 0;
  border: var(--border-thick) solid var(--color-primary-ink);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-cats__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-cats__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thin) solid rgba(255, 255, 255, 0.4);
}

.page-about .about-cats__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid rgba(255, 255, 255, 0.4);
}

.page-about .about-cats__num {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-ink);
  color: var(--color-primary);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
}

.page-about .about-cats__name {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-primary-ink);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-cats__itemBody p {
  margin: 0;
  max-width: 60ch;
  color: var(--color-primary-ink);
  opacity: 0.88;
  line-height: var(--leading-body);
}

/* ---------- 四组分工 ---------- */
.page-about .about-teams {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-about .about-teams__head {
  max-width: 62ch;
  margin-bottom: var(--space-8);
}

.page-about .about-teams .section-title {
  color: var(--color-accent-ink);
}

.page-about .about-teams__eyebrow {
  color: var(--color-accent-ink);
  opacity: 0.7;
  letter-spacing: 0.14em;
}

.page-about .about-teams__lede {
  margin-top: var(--space-3);
  color: var(--color-accent-ink);
  opacity: 0.88;
  line-height: var(--leading-body);
}

.page-about .about-teams__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about .about-teams__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
  background: var(--color-surface);
  color: var(--color-ink);
  border-left: var(--border-thick) solid var(--color-contrast-surface);
  padding: var(--space-3) var(--space-4);
}

.page-about .about-teams__idx {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  flex-shrink: 0;
}

.page-about .about-teams__name {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-teams__body p {
  margin: 0;
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
  font-size: var(--text-base);
}

.page-about .about-teams__figure {
  margin: var(--space-8) 0 0;
  border: var(--border-thick) solid var(--color-accent-ink);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-teams__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 25 / 14;
  object-fit: cover;
}

.page-about .about-teams__cap {
  padding: var(--space-2) var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---------- 本季节奏 ---------- */
.page-about .about-season {
  background: var(--color-surface);
}

.page-about .about-season__head {
  max-width: 62ch;
  margin-bottom: var(--space-8);
}

.page-about .about-season__lede {
  margin-top: var(--space-3);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-about .about-season__axis {
  position: relative;
  padding-top: 56px;
}

.page-about .about-season__line {
  position: absolute;
  top: 30px;
  left: 0;
  right: 0;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
}

.page-about .about-season__line::after {
  content: "";
  position: absolute;
  inset: 0 25% 0 0;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.page-about .about-season__nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-about .about-season__node {
  position: relative;
  padding-top: var(--space-3);
}

.page-about .about-season__dot {
  display: none;
}

.page-about .about-season__node::before {
  content: "";
  position: absolute;
  top: -26px;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-deep);
  border: 4px solid var(--color-surface);
  box-sizing: border-box;
}

.page-about .about-season__node--on::before {
  background: var(--color-accent);
}

.page-about .about-season__label {
  display: inline-block;
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) solid var(--color-line);
  margin-bottom: var(--space-2);
}

.page-about .about-season__node--on .about-season__label {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-about .about-season__node p {
  margin: 0;
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
  font-size: var(--text-base);
}

/* ---------- 地域与备案 ---------- */
.page-about .about-region {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-about .about-region__grid {
  align-items: start;
}

.page-about .about-region__eyebrow {
  color: var(--color-contrast-accent);
  letter-spacing: 0.14em;
}

.page-about .about-region__title {
  color: var(--color-contrast-ink);
  margin-top: var(--space-2);
}

.page-about .about-region__lede {
  margin-top: var(--space-3);
  color: var(--color-contrast-ink);
  opacity: 0.78;
  line-height: var(--leading-body);
  max-width: 46ch;
}

.page-about .about-region__facts {
  display: grid;
  gap: 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-about .about-region__field {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  margin: 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-about .about-region__field .field__name {
  color: var(--color-contrast-ink);
  opacity: 0.6;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}

.page-about .about-region__field .field__value {
  color: var(--color-contrast-ink);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  word-break: break-word;
}

.page-about .about-region__field .field__value.mono {
  font-family: var(--font-mono);
  color: var(--color-contrast-accent);
  letter-spacing: 0.02em;
}

.page-about .about-region__note {
  margin: var(--space-3) 0 0;
  color: var(--color-contrast-ink);
  opacity: 0.74;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
}

.page-about .about-region__next {
  margin: var(--space-3) 0 0;
  color: var(--color-contrast-ink);
  opacity: 0.88;
  line-height: var(--leading-body);
}

.page-about .about-region__next a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-region__next a:hover,
.page-about .about-region__next a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-open__title {
    font-size: var(--text-3xl);
  }

  .page-about .about-cats__item {
    grid-template-columns: 88px 1fr;
    gap: var(--space-4);
    align-items: center;
  }

  .page-about .about-teams__item--a {
    margin-right: 0;
  }

  .page-about .about-teams__item--b {
    margin-right: 7%;
  }

  .page-about .about-teams__item--c {
    margin-right: 17%;
  }

  .page-about .about-teams__item--d {
    margin-right: 27%;
  }

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

  .page-about .about-region__field {
    grid-template-columns: minmax(132px, 36%) 1fr;
    align-items: baseline;
    gap: var(--space-3);
  }
}

@media (min-width: 960px) {
  .page-about .about-open__title {
    font-size: var(--text-4xl);
  }

  .page-about .about-origin__grid {
    gap: var(--space-6);
  }

  .page-about .about-cats__top {
    gap: var(--space-6);
  }

  .page-about .about-cats__figure {
    margin-top: var(--space-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-open__title,
  .page-about .about-cats__name,
  .page-about .about-teams__name {
    transform: none;
  }
}
</main>