/* ===== 品牌概况 · 页面作用域 ===== */

.page-about .about-crumbs {
  padding-block: var(--space-6) var(--space-3);
}

.page-about .about-intro {
  padding-top: var(--space-2);
  padding-bottom: var(--space-6);
}

.page-about .about-intro__aside {
  align-self: end;
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}

.page-about .about-fact__k {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-about .about-fact__v {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  letter-spacing: 0.01em;
}

.page-about .about-title {
  margin: 0 0 var(--space-3);
  max-width: 20ch;
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}

.page-about .about-standfirst {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-about .about-h2 {
  margin: 0 0 var(--space-3);
  max-width: 16ch;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-about .about-kicker {
  margin: 0;
  max-width: 34ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

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

/* ---- 叙事段落 ---- */

.page-about .about-story__body p,
.page-about .about-why__body p,
.page-about .about-next__body p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: 1.9;
  color: var(--color-ink);
}

.page-about .about-story__body p:last-child,
.page-about .about-why__body p:last-child,
.page-about .about-next__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-story__label {
  align-self: start;
  padding-top: var(--space-1);
}

/* ---- 图片 ---- */

.page-about .about-figure {
  position: relative;
  margin: var(--space-6) 0 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-surface-deep);
}

.page-about .about-figure--tight {
  margin-top: var(--space-4);
}

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

.page-about .about-figure .media__caption {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  max-width: 62%;
  margin: 0;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--color-ink-muted);
}

.page-about .about-why__media {
  margin-top: var(--space-6);
}

/* ---- 关键数字 ---- */

.page-about .about-facts {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.page-about .about-facts__label {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---- 分工 ---- */

.page-about .about-team {
  margin-top: var(--space-6);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-about .about-team__card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.page-about .about-team__name {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-about .about-team__desc {
  margin: 0;
  max-width: 34ch;
  font-size: var(--text-sm);
  line-height: 1.78;
  color: var(--color-ink-soft);
}

/* ---- 阶段线 ---- */

.page-about .about-stage__head {
  margin-bottom: var(--space-4);
}

.page-about .about-stage .about-figure {
  margin-top: 0;
}

.page-about .about-track {
  position: relative;
  margin-top: var(--space-6);
}

.page-about .about-track__svg {
  position: absolute;
  top: 6px;
  left: 0;
  width: 100%;
  height: 12px;
  overflow: visible;
  pointer-events: none;
}

.page-about .about-track__line {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
  stroke-linecap: round;
  opacity: 0.5;
  vector-effect: non-scaling-stroke;
}

.page-about .about-track__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  justify-items: start;
}

.page-about .about-track__item {
  padding-top: 6px;
  text-align: left;
}

.page-about .about-track__item:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.page-about .about-track__dot {
  display: block;
  width: 12px;
  height: 12px;
  margin-bottom: var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

.page-about .about-track__dot--a {
  opacity: 0.55;
}

.page-about .about-track__dot--b {
  opacity: 0.75;
}

.page-about .about-track__dot--c {
  opacity: 0.9;
}

.page-about .about-track__dot--now {
  width: 16px;
  height: 16px;
  margin-top: -2px;
  margin-bottom: calc(var(--space-3) - 2px);
  background: var(--color-accent);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-accent) 16%, transparent);
}

.page-about .about-track__name {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-about .about-track__item--now .about-track__name {
  color: var(--color-accent);
}

.page-about .about-track__note {
  margin: 0;
  max-width: 32ch;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
  opacity: 1;
  transform: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

/* ---- 去向与收束 ---- */

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

.page-about .about-links {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-about .about-links__link {
  display: block;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  text-decoration: none;
  transition: background-color 180ms ease, transform 180ms ease;
}

.page-about .about-links__link:hover {
  background: var(--color-primary-soft);
  transform: translateY(-2px);
}

.page-about .about-links__link:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.page-about .about-links__title {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-about .about-links__desc {
  display: block;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

.page-about .about-closing {
  margin: var(--space-8) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-about .about-closing__mark {
  position: relative;
  display: inline-block;
}

.page-about .about-closing__mark::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1em;
  width: 100%;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  transform-origin: left center;
  transform: scaleX(1);
  transition: transform 720ms cubic-bezier(0.22, 0.7, 0.3, 1);
}

.has-js .page-about .about-closing[data-reveal]:not(.is-visible) .about-closing__mark::after {
  transform: scaleX(0);
  transition: none;
}

/* ---- 响应式 ---- */

@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-track__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-3);
    justify-items: center;
  }

  .page-about .about-track__item {
    text-align: center;
  }

  .page-about .about-track__dot {
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-track__note {
    opacity: 0;
    transform: translateY(-4px);
  }

  .page-about .about-track__item:hover .about-track__note,
  .page-about .about-track__item:focus-within .about-track__note,
  .page-about .about-track__item:focus .about-track__note {
    opacity: 1;
    transform: translateY(0);
  }

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

  .page-about .about-next__body {
    padding-top: var(--space-1);
  }
}

@media (hover: none) {
  .page-about .about-track__note {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-links__link,
  .page-about .about-track__note,
  .page-about .about-closing__mark::after {
    transition: none;
  }

  .page-about .about-links__link:hover {
    transform: none;
  }
}