.page-about {
  --about-rail-w: 240px;
}

.page-about .about-hero {
  padding-block: 28px 56px;
}

.page-about .about-hero__label {
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-size: clamp(32px, 8vw, 96px);
  line-height: 1;
  letter-spacing: -0.03em;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 26px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-long);
}

.page-about .about-hero__stats {
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 20px 44px;
}

.page-about .about-hero__stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.5vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}

/* 分屏骨架 */
.page-about .about-split {
  display: grid;
  gap: 36px;
  padding-block: 0 88px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px;
  border-left: 2px solid var(--line);
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--ink);
  background: var(--panel);
  border-left-color: var(--cyan);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-rail__no {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .about-rail__note {
  margin: 22px 0 0;
  padding-left: 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

/* 章节通用 */
.page-about .about-section {
  padding-block: 36px;
  border-top: 1px solid var(--line);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .about-section .plate {
  display: block;
  margin-bottom: 14px;
}

.page-about .about-section__title {
  margin: 0 0 18px;
  font-size: clamp(22px, 4vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-text {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-long);
}

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

.page-about .about-text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-text a:hover,
.page-about .about-text a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--cyan);
}

/* 全宽停顿图 */
.page-about .about-moment {
  margin: 26px 0 34px;
  position: relative;
}

.page-about .about-moment img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 8;
  object-fit: cover;
  border: 1px solid var(--line);
}

.page-about .about-moment figcaption {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}

/* 时间轴 */
.page-about .about-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-deep), var(--line));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 40px 30px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(51, 240, 206, 0.14);
}

.page-about .about-timeline__year {
  display: block;
  font-size: clamp(30px, 7vw, 62px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-timeline__title {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-long);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .about-team__item {
  padding: 22px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan-deep);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  border-top-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-team__item--lead {
  background: var(--rail);
}

.page-about .about-team__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-team__count {
  display: block;
  margin: 10px 0 14px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--sand);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-team__media {
  margin: 30px 0 0;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 8;
  object-fit: cover;
  border: 1px solid var(--line);
}

.page-about .about-team__media figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-2);
}

/* 覆盖范围 */
.page-about .about-deck {
  margin-top: 26px;
  display: grid;
  gap: 14px;
}

.page-about .about-deck__cell {
  padding: 20px 18px;
  background: var(--rail);
  border: 1px solid var(--line);
}

.page-about .about-deck__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-deck__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .about-deck__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .about-example {
  margin-top: 38px;
  display: grid;
  gap: 26px;
}

.page-about .about-example__title {
  margin: 0 0 14px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

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

.page-about .about-example__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* 资质 */
.page-about .about-awards {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-awards__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-awards__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-awards__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  min-width: 4.5ch;
}

.page-about .about-awards__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-awards__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* 合作 */
.page-about .about-partners {
  margin-top: 24px;
  display: grid;
  gap: 30px;
}

.page-about .about-partners__kpi {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(40px, 10vw, 76px);
  font-weight: 700;
  line-height: 0.9;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partners__title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-partners__cta-text {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

/* 收尾 */
.page-about .about-closer {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(680px 280px at 18% 0%, rgba(51, 240, 206, 0.12), transparent 70%),
    var(--rail);
}

.page-about .about-closer__inner {
  padding-block: 64px 72px;
  max-width: 780px;
}

.page-about .about-closer .label {
  color: var(--cyan);
}

.page-about .about-closer__line {
  margin: 16px 0 0;
  font-size: clamp(22px, 4.6vw, 38px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .about-closer__sub {
  margin: 16px 0 28px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* 平板与桌面 */
@media (min-width: 700px) {
  .page-about .about-team {
    grid-template-columns: 1.15fr 1fr 0.95fr;
    align-items: start;
  }

  .page-about .about-team__item:nth-child(2) {
    margin-top: 22px;
  }

  .page-about .about-team__item:nth-child(3) {
    margin-top: 44px;
  }

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

  .page-about .about-deck__cell:nth-child(2) {
    margin-top: 18px;
  }

  .page-about .about-deck__cell:nth-child(4) {
    margin-top: 18px;
  }

  .page-about .about-example {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
    gap: 36px;
  }

  .page-about .about-example__media {
    margin-top: 26px;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 44px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-block: 44px 72px;
  }

  .page-about .about-split {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 64px;
    padding-bottom: 104px;
  }

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

  .page-about .about-section {
    padding-block: 48px;
  }

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

  .page-about .about-deck__cell:nth-child(2) {
    margin-top: 16px;
  }

  .page-about .about-deck__cell:nth-child(3) {
    margin-top: 32px;
  }

  .page-about .about-deck__cell:nth-child(4) {
    margin-top: 48px;
  }

  .page-about .about-team__media {
    margin-top: 40px;
  }

  .page-about .about-closer__inner {
    padding-block: 88px 96px;
  }
}

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