.page-about {
  --about-line: rgba(124, 147, 168, 0.4);
  --about-shadow: 8px 8px 0 var(--char);
  --about-soft: rgba(243, 239, 230, 0.8);
  --about-soft-2: rgba(243, 239, 230, 0.62);
  background:
    radial-gradient(58% 38% at 84% 0%, rgba(31, 182, 166, 0.2), transparent 70%),
    radial-gradient(48% 32% at 2% 10%, rgba(242, 193, 78, 0.13), transparent 72%),
    var(--night);
  color: var(--snow);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  color: var(--snow);
  letter-spacing: -0.01em;
}

.page-about p {
  line-height: 1.85;
  color: var(--about-soft);
}

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

.page-about .img-frame__media {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .breadcrumbs {
  padding-block: 1.4rem 0.4rem;
  font-size: 0.78rem;
}

/* 首屏 */
.about-hero {
  padding-block: clamp(1.6rem, 4vw, 3rem) clamp(2.4rem, 6vw, 4.5rem);
  border-bottom: var(--border) solid var(--about-line);
}

.about-hero__grid {
  display: grid;
  gap: 2.2rem;
}

.about-hero__main h1 {
  font-size: clamp(1.95rem, 7vw, 4rem);
  line-height: 1.12;
  margin: 0.7rem 0 1.2rem;
}

.about-hero .lead {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.4vw, 1.26rem);
  line-height: 1.85;
  color: var(--about-soft);
  max-width: 34em;
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}

.about-hero__side {
  border: var(--border) solid var(--teal-deep);
  background: linear-gradient(160deg, var(--slate), var(--night-deep));
  box-shadow: var(--about-shadow);
  padding: 1.3rem 1.2rem 1.2rem;
}

.about-side__title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.about-stats {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.about-stats__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed var(--about-line);
}

.about-stats__item dt {
  font-size: 0.85rem;
  color: var(--about-soft-2);
}

.about-stats__item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.1;
}

.about-stats__unit {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--about-soft-2);
}

.about-side__note {
  margin: 1rem 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--about-soft-2);
  border-left: 3px solid var(--teal);
  padding-left: 0.7rem;
}

/* 章节目录 */
.about-jump {
  position: sticky;
  top: 0;
  z-index: 6;
  background: rgba(7, 17, 31, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: var(--border) solid var(--teal-deep);
}

.about-jump__list {
  display: flex;
  gap: 0.3rem;
  margin: 0;
  padding: 0.6rem var(--gutter);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.about-jump__link {
  display: inline-block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--about-soft-2);
  text-decoration: none;
  padding: 0.42rem 0.66rem;
  border: 1px solid transparent;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.about-jump__link:hover,
.about-jump__link:focus-visible {
  color: var(--night);
  background: var(--gold);
  border-color: var(--gold);
  outline: none;
}

/* 章节通用 */
.about-section {
  padding-block: clamp(2.6rem, 7vw, 5.2rem);
  border-bottom: var(--border) solid var(--about-line);
}

.about-section h2,
.about-stage h2,
.about-cta h2 {
  font-size: clamp(1.45rem, 4.4vw, 2.4rem);
  line-height: 1.22;
  margin: 0.55rem 0 1.1rem;
}

/* 起点 */
.about-origin {
  display: grid;
  gap: 2rem;
}

.about-origin__text p {
  max-width: 36em;
  margin: 0 0 1rem;
}

.about-origin__notes {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px dashed var(--about-line);
  display: grid;
  gap: 0.65rem;
}

.about-origin__notes li {
  display: flex;
  gap: 0.7rem;
  align-items: baseline;
  font-size: 0.86rem;
  color: var(--about-soft-2);
  line-height: 1.65;
}

.about-origin__notes .mono {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--teal);
  letter-spacing: 0.04em;
}

.about-origin__figure {
  margin: 0;
  border: var(--border) solid var(--char);
  box-shadow: var(--about-shadow);
  background: var(--slate);
}

/* 发展历程 */
.about-stage {
  position: relative;
  padding-block: clamp(2.6rem, 7vw, 5.2rem);
  border-bottom: var(--border) solid var(--about-line);
  overflow: hidden;
}

.about-stage__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.3;
}

.about-stage__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-stage__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--night) 0%, rgba(10, 26, 47, 0.55) 45%, var(--night) 100%);
}

.about-stage__inner {
  position: relative;
  z-index: 1;
}

.about-stage__intro {
  max-width: 38em;
  margin: 0;
}

.about-scroll-hint {
  margin: 1.6rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.about-stages {
  display: flex;
  gap: 1rem;
  margin-top: 0.9rem;
  padding: 0.3rem 0.2rem 1.4rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.about-stage-card {
  flex: 0 0 auto;
  width: min(82vw, 320px);
  scroll-snap-align: start;
  padding: 1.2rem 1.15rem 1.4rem;
  border: var(--border) solid var(--slate);
  background: rgba(7, 17, 31, 0.93);
  box-shadow: 6px 6px 0 var(--char);
}

.about-stage-card__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.03em;
}

.about-stage-card__label {
  margin: 0.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
}

.about-stage-card h3 {
  margin: 0.5rem 0 0.55rem;
  font-size: 1.08rem;
  line-height: 1.4;
}

.about-stage-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--about-soft-2);
}

/* 数据编辑 */
.about-data {
  display: grid;
  gap: 2rem;
}

.about-data__text p {
  max-width: 36em;
  margin: 0 0 1rem;
}

.about-data__stats {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.about-data__stat {
  border-left: 4px solid var(--teal);
  padding: 0.15rem 0 0.15rem 1rem;
}

.about-data__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--snow);
}

.about-data__stat span {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.84rem;
  color: var(--about-soft-2);
}

/* 合作与认可 */
.about-partners {
  display: grid;
  gap: 2rem;
}

.about-partners__figure {
  margin: 0;
  border: var(--border) solid var(--char);
  box-shadow: var(--about-shadow);
  background: var(--slate);
}

.about-partners__text p {
  max-width: 36em;
  margin: 0 0 1rem;
}

.about-honors {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

.about-honor {
  border: var(--border) solid var(--gold);
  background: rgba(242, 193, 78, 0.07);
  box-shadow: 5px 5px 0 var(--char);
  padding: 1rem 1.05rem 1.1rem;
}

.about-honor h3 {
  margin: 0.65rem 0 0.4rem;
  font-size: 1.02rem;
  line-height: 1.45;
}

.about-honor p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--about-soft-2);
}

/* 团队 */
.about-team__intro {
  max-width: 40em;
  margin: 0 0 1.8rem;
}

.about-team__grid {
  display: grid;
  gap: 1rem;
}

.about-team__card {
  border: var(--border) solid var(--slate);
  background: rgba(42, 58, 77, 0.42);
  padding: 1.15rem 1.1rem 1.3rem;
  box-shadow: 5px 5px 0 var(--char);
}

.about-team__card b {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
}

.about-team__card h3 {
  margin: 0.55rem 0 0.45rem;
  font-size: 1rem;
}

.about-team__card p {
  margin: 0;
  font-size: 0.86rem;
  color: var(--about-soft-2);
}

.about-team__card--accent {
  border-color: var(--gold);
  background: rgba(242, 193, 78, 0.09);
}

.about-team__card--accent b {
  color: var(--gold);
  font-size: 1.25rem;
}

.about-team__link {
  color: var(--snow);
  text-decoration: none;
  border-bottom: 2px solid var(--teal);
}

.about-team__link:hover,
.about-team__link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
  outline: none;
}

/* 收尾 */
.about-cta {
  padding-block: clamp(2.6rem, 7vw, 5rem);
  background: linear-gradient(140deg, var(--teal-deep), var(--night-deep) 62%);
}

.about-cta__inner p {
  max-width: 34em;
  margin: 0 0 1.6rem;
  color: rgba(243, 239, 230, 0.86);
}

.about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

@media (min-width: 760px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 2.6rem;
  }

  .about-origin {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 2.6rem;
  }

  .about-origin__figure {
    margin-top: 2.2rem;
  }

  .about-data {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.8fr);
    gap: 3rem;
  }

  .about-partners {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 2.8rem;
  }

  .about-partners__figure {
    margin-top: 1.6rem;
  }

  .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }

  .about-honor {
    padding: 1.1rem 1.25rem 1.2rem;
  }
}

@media (min-width: 1000px) {
  .about-stage-card {
    width: 330px;
  }

  .about-jump__list {
    justify-content: center;
  }

  .about-origin__figure {
    margin-top: 3.4rem;
  }
}

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