.page-about {
  background: var(--c-snow);
  color: var(--c-ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

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

.page-about__crumb-wrap {
  padding-top: 24px;
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: 36px;
  padding-top: 20px;
  padding-bottom: 8px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.4vw, 60px);
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--c-deep);
  margin: 14px 0 0;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin-top: 20px;
  max-width: 34em;
  color: var(--c-ink);
}

.page-about .about-hero__note {
  margin-top: 16px;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-gray);
}

.page-about .about-hero__aside {
  border-top: 1px solid var(--c-gold);
  padding-top: 14px;
}

.page-about .about-hero__aside-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-gray);
}

.page-about .about-hero__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero__list-item + .about-hero__list-item {
  border-top: var(--hair);
}

.page-about .about-hero__link {
  display: block;
  padding: 12px 0;
  color: var(--c-ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.16s linear;
}

.page-about .about-hero__link-note {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--c-gray);
  letter-spacing: 0.01em;
}

.page-about .about-hero__link:hover,
.page-about .about-hero__link:focus-visible {
  color: var(--c-orange-deep);
}

.page-about .about-hero__link:hover .about-hero__link-note {
  color: var(--c-orange-deep);
}

.page-about .about-hero__figure {
  margin: 28px 0 0;
  overflow: hidden;
  border: var(--hair);
}

.page-about .about-hero__figure img {
  width: 100%;
  height: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-hero__caption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-gray);
  border-top: var(--hair);
  background: var(--c-snow);
}

/* 章节通用 */
.page-about .about-sec {
  padding-block: 56px;
  border-top: var(--hair);
}

.page-about .about-sec__num {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--c-orange-deep);
}

.page-about .about-sec__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.35;
  letter-spacing: 0.04em;
  color: var(--c-deep);
  margin: 0 0 18px;
}

.page-about .about-sec__text {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
  max-width: 40em;
}

.page-about .about-sec__text--tight {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--c-mist);
  font-size: 15px;
  color: var(--c-gray);
}

/* 时间脊 */
.page-about .timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--c-gold);
  max-width: 42em;
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 34px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px var(--c-snow), 0 0 0 5px var(--c-mist);
  transition: background-color 0.24s linear;
}

.page-about .timeline__item:hover::before {
  background: var(--c-orange);
}

.page-about .timeline__stage {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-orange-deep);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.45;
  letter-spacing: 0.03em;
  color: var(--c-ink);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-interlude {
  margin: 36px 0 0;
  width: 100%;
  max-width: 300px;
  border: var(--hair);
  padding: 10px 10px 0;
  background: var(--c-snow);
}

.page-about .about-interlude img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-interlude__cap {
  padding: 10px 2px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-gray);
}

/* 数字带 */
.page-about .about-stats {
  background: var(--c-deep);
  color: var(--c-snow);
  padding-block: 48px;
  border-top: 1px solid var(--c-gold);
  border-bottom: 1px solid var(--c-gold);
}

.page-about .about-stats__eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-gold);
}

.page-about .about-stats__title {
  margin: 0 0 30px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--c-snow);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(159, 191, 204, 0.45);
}

.page-about .about-stats__item {
  padding-top: 16px;
}

.page-about .about-stats__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--c-snow);
}

.page-about .about-stats__unit {
  font-size: 0.5em;
  margin-left: 3px;
  color: var(--c-gold);
}

.page-about .about-stats__label {
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(251, 252, 253, 0.72);
}

.page-about .about-stats__note {
  margin: 30px 0 0;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(251, 252, 253, 0.78);
  padding-top: 16px;
  border-top: 1px solid rgba(159, 191, 204, 0.3);
}

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

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

.page-about .team-card {
  border: var(--hair);
  background: var(--c-snow);
  padding: 20px;
  transition: border-color 0.16s linear, background-color 0.16s linear;
}

.page-about .team-card:hover {
  border-color: var(--c-orange-deep);
  background: #fff;
}

.page-about .team-card__title {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--c-blue);
}

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

.page-about .about-team__figure {
  margin: 0;
  border: var(--hair);
}

.page-about .about-team__figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__cap {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-gray);
  border-top: var(--hair);
}

/* 合作生态 */
.page-about .partner-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  max-width: 46em;
}

.page-about .partner-row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: var(--hair);
}

.page-about .partner-row:last-child {
  border-bottom: var(--hair);
}

.page-about .partner-row__key {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.05em;
  color: var(--c-blue);
}

.page-about .partner-row__val {
  min-width: 0;
}

.page-about .partner-row__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
}

/* 城市合伙人 */
.page-about .about-program {
  background: var(--c-mist);
  padding: 24px 20px;
  border-left: 3px solid var(--c-blue);
  max-width: 46em;
}

.page-about .about-program__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-program__cta {
  margin: 20px 0 0;
}

/* 资料 */
.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* 底部色带 */
.page-about .about-cta {
  background: var(--c-blue);
  transition: background-color 0.16s linear;
}

.page-about .about-cta:hover,
.page-about .about-cta:focus-within {
  background: var(--c-deep);
}

.page-about .about-cta__link {
  display: block;
  position: relative;
  padding-block: 44px;
  color: var(--c-snow);
  text-decoration: none;
}

.page-about .about-cta__kicker {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-gold);
  margin-bottom: 12px;
}

.page-about .about-cta__title {
  display: block;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(20px, 3.6vw, 30px);
  line-height: 1.4;
  letter-spacing: 0.04em;
  max-width: 22em;
}

.page-about .about-cta__desc {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(251, 252, 253, 0.8);
  max-width: 34em;
}

.page-about .about-cta__arrow {
  display: block;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--c-gold);
}

/* 右侧锚点索引 */
.page-about .anchor-index {
  display: none;
}

@media (min-width: 640px) {
  .page-about .about-stats__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-team__cards .team-card:nth-child(even) {
    transform: translateY(22px);
  }

  .page-about .about-team {
    padding-bottom: 22px;
  }

  .page-about .partner-row {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-program {
    padding: 30px 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) 232px;
    column-gap: 56px;
    align-items: start;
    padding-top: 34px;
    padding-bottom: 16px;
  }

  .page-about .about-hero__aside {
    padding-top: 18px;
  }

  .page-about .about-hero__figure {
    margin-top: 34px;
  }

  .page-about .about-sec {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    column-gap: 36px;
    padding-block: 84px;
  }

  .page-about .about-sec__num {
    margin: 0;
    align-self: start;
    position: sticky;
    top: 84px;
    color: var(--c-blue);
  }

  .page-about .about-sec__num::after {
    content: "";
    display: block;
    width: 26px;
    height: 1px;
    margin-top: 10px;
    background: var(--c-gold);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) 300px;
    column-gap: 30px;
    align-items: start;
  }

  .page-about .about-interlude {
    margin-left: auto;
    margin-top: 44px;
  }

  .page-about .about-cta__link {
    padding-block: 64px;
  }

  .page-about .about-cta__arrow {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    margin-top: 0;
    font-size: 30px;
  }
}

@media (min-width: 1101px) {
  .page-about .anchor-index {
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: fixed;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }
}