.page-about {
  --ab-line: #DDE4E1;
  --ab-plate: #E9EEEC;
  --ab-body: #2C3A35;
  --ab-watch-hover: #1B4038;
  --ab-gap: clamp(20px, 3.4vw, 40px);
  background: var(--c-canvas);
  color: var(--c-title);
  font-family: var(--f-body);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: 20px;
  background: var(--c-canvas);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(125% 105% at 100% 0%, rgba(214, 43, 32, 0.20), transparent 58%),
    radial-gradient(95% 85% at 0% 100%, rgba(240, 192, 0, 0.10), transparent 62%),
    var(--c-ink);
  color: var(--c-on-dark);
  padding-block: clamp(36px, 6.5vw, 88px) clamp(34px, 5.5vw, 72px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  max-width: 1120px;
}

.page-about .about-hero__kicker {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-yellow);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(30px, 6.2vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.55vw, 18px);
  line-height: 1.78;
  color: var(--c-on-dark);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(8px, 1.8vw, 20px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.4vw, 28px);
}

.page-about .about-hero__stats > li {
  display: grid;
  gap: 5px;
  align-content: start;
  padding-top: 12px;
  border-top: 2px solid rgba(240, 192, 0, 0.42);
}

.page-about .about-hero__num {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: 0.01em;
  color: #FFFFFF;
}

.page-about .about-hero__num em {
  font-style: normal;
  font-size: 0.42em;
  color: var(--c-yellow);
  margin-left: 3px;
  letter-spacing: 0.02em;
}

.page-about .about-hero__cap {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--c-on-dark-dim);
}

/* ---------- 通用区块头 ---------- */
.page-about .about-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(26px, 4.4vw, 54px);
  max-width: 62ch;
}

.page-about .about-head h2,
.page-about .about-head .section__title {
  margin: 0;
}

.page-about .about-head .section__lede {
  margin: 0;
}

.page-about .about-head__kicker {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-red);
}

.page-about .about-head__kicker--light {
  color: var(--c-yellow);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  background: var(--c-canvas);
  padding-block: clamp(42px, 6.6vw, 92px);
}

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

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  column-gap: clamp(12px, 1.8vw, 22px);
  padding-bottom: clamp(34px, 5vw, 68px);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 24px;
  width: 1px;
  height: calc(100% - 18px);
  background: linear-gradient(180deg, var(--ab-line) 0%, var(--ab-line) 72%, rgba(221, 228, 225, 0) 100%);
}

.page-about .tl__item:last-child::before {
  content: none;
}

.page-about .tl__chip {
  grid-column: 1;
  grid-row: 1;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  box-sizing: border-box;
  border-radius: 2px;
  background: var(--c-surface);
  border: 2px solid var(--c-line);
  position: relative;
  z-index: 1;
}

.page-about .tl__chip--start {
  background: var(--c-yellow);
  border-color: var(--c-yellow);
}

.page-about .tl__chip--done {
  background: var(--c-ink-2);
  border-color: var(--c-ink-2);
}

.page-about .tl__chip--ghost {
  background: var(--ab-plate);
  border-color: var(--ab-line);
}

.page-about .tl__body {
  grid-column: 2;
  min-width: 0;
  display: grid;
  gap: 12px;
}

.page-about .tl__item--s1 .tl__body {
  max-width: 620px;
  gap: 10px;
}

.page-about .tl__item--s2 .tl__body {
  max-width: 780px;
  gap: 14px;
}

.page-about .tl__item--s3 .tl__body {
  max-width: 920px;
  gap: 18px;
}

.page-about .tl__meta {
  margin: 0;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .tl__idx {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-red);
  background: rgba(214, 43, 32, 0.10);
  padding: 3px 8px;
  border-radius: 2px;
}

.page-about .tl__year {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .tl__title {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.24;
  letter-spacing: -0.005em;
  color: var(--c-title);
}

.page-about .tl__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.74;
  color: var(--ab-body);
  max-width: 64ch;
}

.page-about .tl__item--s1 .tl__text {
  font-size: 15.5px;
  line-height: 1.7;
}

.page-about .tl__item--s3 .tl__text {
  font-size: 17px;
  line-height: 1.82;
}

.page-about .tl__cols {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

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

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

.page-about .tl__link {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-red);
  text-decoration: none;
  border-bottom: 2px solid rgba(214, 43, 32, 0.28);
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .tl__link:hover,
.page-about .tl__link:focus-visible {
  color: var(--c-red-deep);
  border-color: var(--c-red-deep);
}

/* ---------- 图片容器 ---------- */
.page-about .media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ab-plate);
}

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

.page-about .media--4x3 {
  aspect-ratio: 4 / 3;
}

.page-about .tl__plate {
  aspect-ratio: 2 / 1;
  grid-column: 2;
}

.page-about .media__caption {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-muted);
  padding-top: 8px;
}

/* ---------- 值守 ---------- */
.page-about .about-watch {
  background: var(--c-ink-2);
  color: var(--c-on-dark);
  padding-block: clamp(42px, 6.6vw, 90px);
}

.page-about .about-watch .section__title {
  color: #FFFFFF;
}

.page-about .about-watch .section__lede {
  color: var(--c-on-dark);
}

.page-about .watch {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .watch__step {
  background: var(--c-ink-2);
  border-top: 3px solid var(--ab-line);
  padding: clamp(22px, 3vw, 34px) clamp(18px, 2.4vw, 28px);
  display: grid;
  gap: 10px;
  align-content: start;
  transition: background 0.24s ease;
}

.page-about .watch__step--teal {
  border-top-color: var(--c-teal);
}

.page-about .watch__step--yellow {
  border-top-color: var(--c-yellow);
}

.page-about .watch__step--red {
  border-top-color: var(--c-red);
}

.page-about .watch__step:hover {
  background: var(--ab-watch-hover);
}

.page-about .watch__no {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-on-dark-dim);
}

.page-about .watch__step h3 {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.26;
  color: #FFFFFF;
}

.page-about .watch__step p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--c-on-dark);
}

/* ---------- 用户与分布 ---------- */
.page-about .about-users {
  background: var(--c-canvas);
  padding-block: clamp(42px, 6.6vw, 92px);
}

.page-about .users {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-about .users__head {
  display: grid;
  gap: 10px;
  max-width: 64ch;
}

.page-about .users__head h2 {
  margin: 0;
}

.page-about .users__note {
  margin: 4px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about .users__figures {
  display: grid;
  gap: 18px;
}

.page-about .ufig {
  display: grid;
  gap: 6px;
  padding-top: 14px;
  border-top: 2px solid var(--c-ink-2);
}

.page-about .ufig__n {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1;
  color: var(--c-title);
}

.page-about .ufig__n em {
  font-style: normal;
  font-size: 0.4em;
  color: var(--c-red);
  margin-left: 3px;
}

.page-about .ufig__l {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .users__map {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: clamp(20px, 2.8vw, 32px);
  box-shadow: var(--shadow-lift);
}

.page-about .users__map-title {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 22px);
  color: var(--c-title);
}

.page-about .users__map-lede {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .cover {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 18px;
}

.page-about .cover span {
  display: block;
  width: 22px;
  height: 22px;
  border-radius: 2px;
  background: var(--ab-line);
}

.page-about .cover span.is-hot {
  background: var(--c-red);
}

.page-about .cover__legend {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .cover__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--c-muted);
}

.page-about .cover__swatch {
  flex: none;
  width: 13px;
  height: 13px;
  border-radius: 2px;
  background: var(--ab-line);
}

.page-about .cover__swatch--hot {
  background: var(--c-red);
}

/* ---------- 合作与观察 ---------- */
.page-about .about-press {
  background: var(--c-canvas);
  padding-block: 0 clamp(42px, 6.6vw, 88px);
}

.page-about .press {
  display: grid;
  gap: 1px;
  background: var(--ab-line);
  border-block: 1px solid var(--ab-line);
}

.page-about .press__item {
  background: var(--c-canvas);
  padding: clamp(24px, 3.4vw, 42px) clamp(18px, 2.4vw, 34px);
  display: grid;
  gap: 12px;
  align-content: start;
  justify-items: start;
}

.page-about .press__item h2 {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1.26;
  color: var(--c-title);
}

.page-about .press__item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ab-body);
  max-width: 54ch;
}

/* ---------- 落地四川 ---------- */
.page-about .about-root {
  background: var(--c-canvas);
  padding-block: 0 clamp(44px, 6.6vw, 92px);
}

.page-about .about-root__photo {
  aspect-ratio: 16 / 7;
}

.page-about .about-root__band {
  margin-top: clamp(18px, 2.6vw, 30px);
  background: var(--c-ink);
  color: var(--c-on-dark);
  border-radius: var(--radius);
  padding: clamp(24px, 3.4vw, 44px) clamp(20px, 2.8vw, 40px);
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-root__lead h2 {
  margin: 0 0 10px;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.24;
  color: #FFFFFF;
}

.page-about .about-root__lead p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-on-dark);
  max-width: 52ch;
}

.page-about .about-root__facts {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-root__facts > div {
  display: grid;
  gap: 3px;
  padding-top: 10px;
  border-top: 1px solid var(--c-hairline);
}

.page-about .about-root__facts dt {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-on-dark-dim);
}

.page-about .about-root__facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: #FFFFFF;
  overflow-wrap: anywhere;
}

/* ---------- 相关入口 ---------- */
.page-about .about-next {
  background: var(--c-canvas);
  padding-block: 0 clamp(48px, 7vw, 88px);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-next__list a {
  display: grid;
  gap: 8px;
  padding: 20px 18px;
  background: var(--c-surface);
  color: var(--c-title);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  background: var(--c-ink);
  color: #FFFFFF;
}

.page-about .about-next__k {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-red);
}

.page-about .about-next__list a:hover .about-next__k,
.page-about .about-next__list a:focus-visible .about-next__k {
  color: var(--c-yellow);
}

.page-about .about-next__t {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

/* ---------- 入场 ---------- */
.page-about .js-reveal {
  opacity: 0;
  transform: translateY(14px);
}

.page-about .js-reveal.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 0.7, 0.3, 1);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .tl__cols {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

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

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

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

  .page-about .about-root__band {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .about-root__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .users {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    grid-template-areas:
      "head map"
      "figures map";
    align-items: start;
    column-gap: clamp(32px, 5vw, 72px);
    row-gap: clamp(24px, 3.4vw, 40px);
  }

  .page-about .users__head {
    grid-area: head;
  }

  .page-about .users__figures {
    grid-area: figures;
  }

  .page-about .users__map {
    grid-area: map;
  }
}

@media (hover: none) {
  .page-about .watch__step:hover {
    background: var(--c-ink-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .js-reveal,
  .page-about .js-reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .watch__step,
  .page-about .about-next__list a,
  .page-about .tl__link {
    transition: none;
  }
}