.page-about {
  --about-card: rgba(11, 44, 68, 0.62);
  --about-line: rgba(154, 182, 198, 0.22);
  --about-text: var(--mist);
  --about-heading: var(--paper);
  background: var(--night);
  color: var(--paper);
  overflow-x: clip;
}

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

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0 0 clamp(16px, 3vw, 26px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mist);
}

.page-about .breadcrumb__list > li + li::before {
  content: "/";
  margin: 0 8px;
  color: rgba(154, 182, 198, 0.45);
}

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

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-line);
}

.page-about .breadcrumb__current {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(22px, 4vw, 40px) clamp(46px, 8vw, 100px);
  background:
    radial-gradient(105% 70% at 88% -12%, rgba(31, 242, 209, 0.17), transparent 62%),
    radial-gradient(78% 58% at -6% 12%, rgba(255, 138, 61, 0.13), transparent 66%),
    linear-gradient(180deg, var(--pitch) 0%, var(--night) 76%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
}

.page-about .about-hero__tag {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--cyan-line);
  background: rgba(31, 242, 209, 0.08);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-hero h1 {
  margin: 18px 0 0;
  max-width: 14em;
  font-family: var(--font-sans);
  font-size: clamp(31px, 6.4vw, 60px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 32em;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 34px);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--cyan-line);
  background: linear-gradient(155deg, var(--pitch), var(--night));
  box-shadow: var(--shadow-deep);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 46%, rgba(6, 24, 38, 0.78) 100%);
  pointer-events: none;
}

.page-about .about-hero__figure .media__caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 15px;
  z-index: 1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--paper);
}

/* ---------- 通用排版 ---------- */
.page-about .about-h2 {
  margin: 0 0 clamp(14px, 2.2vw, 20px);
  font-family: var(--font-sans);
  font-size: clamp(25px, 4vw, 38px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--about-heading);
}

.page-about .about-lede {
  margin: 0;
  max-width: 36em;
  font-size: clamp(15.5px, 1.8vw, 17px);
  line-height: 1.9;
  color: var(--about-text);
}

.page-about .about-origin__body p,
.page-about .about-team__body p,
.page-about .about-reach__body p,
.page-about .about-next__panel p {
  margin: 0 0 1em;
  max-width: 34em;
  font-size: clamp(15.5px, 1.7vw, 17px);
  line-height: 1.9;
  color: var(--about-text);
}

.page-about .about-origin__body p:last-child,
.page-about .about-team__body p:last-of-type,
.page-about .about-reach__body p:last-of-type {
  margin-bottom: 0;
}

/* ---------- 起点与定位 ---------- */
.page-about .about-origin {
  padding-block: clamp(46px, 8vw, 92px);
  background: var(--night);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(20px, 3.2vw, 32px);
}

.page-about .about-origin__aside {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-left: 15px;
  border-left: 2px solid var(--sunset);
}

.page-about .about-origin__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-checks {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-checks li {
  position: relative;
  padding-left: 28px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .about-checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 14px;
  height: 2px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(31, 242, 209, 0.55);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding-block: clamp(46px, 8vw, 92px);
  background: linear-gradient(180deg, var(--night) 0%, var(--pitch) 52%, var(--night) 100%);
  border-block: 1px solid var(--line);
}

.page-about .about-timeline__head {
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(31, 242, 209, 0.24) 56%, var(--sunset) 100%);
}

.page-about .timeline__item {
  position: relative;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 18px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(31, 242, 209, 0.1);
}

.page-about .timeline__card {
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-line);
  background: var(--about-card);
  transition: border-color 0.3s ease, background 0.3s ease;
}

.page-about .timeline__card[open] {
  border-color: var(--cyan-line);
  background: rgba(14, 58, 74, 0.78);
}

.page-about .timeline__card > summary {
  display: flex;
  flex-wrap: nowrap;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

.page-about .timeline__card > summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline__card > summary::marker {
  content: "";
}

.page-about .timeline__card > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--sunset);
}

.page-about .timeline__card[open] > summary::after {
  content: "−";
  color: var(--cyan);
}

.page-about .timeline__year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.4vw, 21px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .timeline__title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .timeline__card p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  --about-text: #33414b;
  --about-heading: var(--ink);
  padding-block: clamp(46px, 8vw, 92px);
  background: var(--archive);
  color: var(--ink);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-team__body .eyebrow {
  color: var(--slate);
  border-color: rgba(14, 58, 74, 0.28);
  background: rgba(14, 58, 74, 0.07);
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 12px;
  margin: clamp(22px, 3.4vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__stats li {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(14, 58, 74, 0.07);
  border: 1px solid rgba(14, 58, 74, 0.14);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--slate);
}

.page-about .about-team__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: #4b5b66;
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(14, 58, 74, 0.18);
  background: var(--slate);
}

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

.page-about .about-team__figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: #4b5b66;
  background: rgba(255, 255, 255, 0.66);
}

/* ---------- 资料库 ---------- */
.page-about .about-archive {
  padding-block: clamp(46px, 8vw, 92px);
  background:
    radial-gradient(70% 50% at 100% 0%, rgba(255, 59, 92, 0.1), transparent 62%),
    radial-gradient(60% 46% at 0% 100%, rgba(31, 242, 209, 0.1), transparent 64%),
    var(--night);
}

.page-about .about-archive__head {
  margin-bottom: clamp(22px, 3.4vw, 30px);
}

.page-about .about-archive__stats {
  display: grid;
  gap: 10px;
  margin: 0 0 clamp(22px, 4vw, 34px);
  padding: 0;
  list-style: none;
}

.page-about .about-archive__stats li {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-line);
  background: rgba(31, 242, 209, 0.05);
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-archive__stats .mono {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
}

.page-about .archive-grid {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .archive-card {
  height: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--about-line);
  background: rgba(11, 44, 68, 0.5);
  transition: border-color 0.3s ease;
}

.page-about .archive-card[open] {
  border-color: var(--cyan-line);
}

.page-about .archive-card > summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .archive-card > summary::-webkit-details-marker {
  display: none;
}

.page-about .archive-card > summary::marker {
  content: "";
}

.page-about .archive-card__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sunset);
}

.page-about .archive-card p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-reach {
  --about-text: #33414b;
  --about-heading: var(--ink);
  padding-block: clamp(46px, 8vw, 92px);
  background: var(--archive);
  color: var(--ink);
}

.page-about .about-reach__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-reach__body .eyebrow {
  color: var(--slate);
  border-color: rgba(14, 58, 74, 0.28);
  background: rgba(14, 58, 74, 0.07);
}

.page-about .about-reach__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(14, 58, 74, 0.16);
  background: var(--slate);
}

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

.page-about .about-reach__figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: #4b5b66;
  background: rgba(255, 255, 255, 0.7);
}

.page-about .about-reach__partners {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-reach__partners li {
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(14, 58, 74, 0.22);
  background: rgba(14, 58, 74, 0.06);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--slate);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  padding-block: clamp(46px, 8vw, 92px);
  background: linear-gradient(180deg, var(--night) 0%, var(--pitch) 100%);
}

.page-about .about-honors__head {
  margin-bottom: clamp(22px, 3.4vw, 32px);
}

.page-about .about-honors__grid {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-honor {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(31, 242, 209, 0.09), rgba(11, 44, 68, 0.62) 62%);
}

.page-about .about-honor__badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 138, 61, 0.42);
  background: rgba(255, 138, 61, 0.16);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sunset);
}

.page-about .about-honor h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 800;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-honor p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-block: clamp(46px, 8vw, 92px);
  background: var(--night);
  border-top: 1px solid var(--line);
}

.page-about .about-next__panel {
  position: relative;
  padding: clamp(26px, 4.4vw, 48px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--cyan-line);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(31, 242, 209, 0.16), transparent 62%),
    radial-gradient(70% 110% at 0% 100%, rgba(255, 138, 61, 0.14), transparent 62%),
    var(--pitch);
  overflow: hidden;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 30px);
}

.page-about .about-next__more {
  margin: clamp(18px, 2.6vw, 24px) 0 0 !important;
  font-size: 14px !important;
  line-height: 1.8 !important;
  color: var(--mist) !important;
}

.page-about .about-next__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
}

.page-about .about-next__more a:hover,
.page-about .about-next__more a:focus-visible {
  color: var(--sunset);
  border-bottom-color: var(--sunset);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .archive-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-archive__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-origin__grid {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .timeline {
    padding-left: 40px;
  }

  .page-about .timeline::before {
    left: 6px;
    width: 3px;
  }

  .page-about .timeline__item::before {
    left: -40px;
    top: 22px;
    width: 14px;
    height: 14px;
  }

  .page-about .timeline__card {
    padding: 16px 22px;
  }

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

  .page-about .about-honor:nth-child(2) {
    margin-top: clamp(24px, 4vw, 48px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(32px, 5vw, 68px);
    align-items: end;
  }

  .page-about .about-hero__figure {
    margin-bottom: 6px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: center;
  }
}

@media (min-width: 1020px) {
  .page-about .archive-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__card,
  .page-about .archive-card,
  .page-about .breadcrumb__link {
    transition: none;
  }
}