.page-about {
  --about-rail: clamp(1.5rem, 4vw, 3rem);
  --about-shadow: 9px 9px 0 var(--jn-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  color: var(--jn-paper);
  padding-block: clamp(2rem, 4.5vw, 3.25rem) clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 88% 10%, rgba(127, 224, 212, 0.16), transparent 58%),
    radial-gradient(90% 70% at 4% 96%, rgba(217, 181, 109, 0.14), transparent 60%),
    linear-gradient(158deg, var(--jn-dai) 0%, var(--jn-mo) 58%, var(--jn-ink) 100%);
}

.page-about .about-hero .breadcrumb {
  color: rgba(244, 239, 230, 0.72);
  font-size: 0.8125rem;
}

.page-about .about-hero .breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(244, 239, 230, 0.35);
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--jn-neon);
  border-bottom-color: var(--jn-neon);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-hero .display-title {
  font-size: clamp(2.1rem, 5.4vw, 3.9rem);
  line-height: 1.12;
  margin: 0.6rem 0 1.1rem;
  max-width: 22ch;
}

.page-about .about-hero__mark {
  color: var(--jn-flame);
}

.page-about .about-hero .lede {
  color: rgba(244, 239, 230, 0.88);
  max-width: 48ch;
  margin: 0;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: clamp(1rem, 2.4vw, 1.4rem) 0 0;
  border-top: 2px solid rgba(244, 239, 230, 0.25);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2.25rem;
  font-family: var(--jn-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: rgba(244, 239, 230, 0.82);
}

.page-about .about-hero__facts .mono-num {
  color: var(--jn-neon);
  font-weight: 600;
}

.page-about .about-hero__media {
  aspect-ratio: 16 / 9;
  border-color: rgba(244, 239, 230, 0.55);
  box-shadow: 9px 9px 0 rgba(18, 24, 26, 0.65);
}

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

/* ---------- 起源与使命 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.page-about .about-aside-title {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  letter-spacing: 0.02em;
  margin: 0.5rem 0 0.75rem;
  color: var(--jn-dai);
}

.page-about .about-origin__body > p {
  max-width: 62ch;
  margin: 0 0 1.1rem;
}

.page-about .about-origin__body .section-title {
  margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.page-about .about-mission {
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding: clamp(1.25rem, 3vw, 1.9rem);
  border-left: 6px solid var(--jn-flame);
  background: linear-gradient(90deg, rgba(255, 77, 46, 0.1), rgba(255, 77, 46, 0));
  color: var(--jn-dai);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 700;
  line-height: 1.6;
}

.page-about .about-mission p {
  margin: 0;
}

.page-about .about-purpose {
  display: grid;
  gap: clamp(1rem, 2.2vw, 1.5rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-card {
  border: var(--jn-line) solid var(--jn-ink);
  background: linear-gradient(180deg, #ffffff 0%, var(--jn-paper) 100%);
  padding: var(--jn-pad);
  box-shadow: var(--about-shadow);
}

.page-about .about-card .index-label {
  color: var(--jn-cinnabar);
  margin: 0;
}

.page-about .about-card .sub-title {
  margin: 0.55rem 0 0.6rem;
  color: var(--jn-dai);
}

.page-about .about-card p:last-child {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ---------- 历程时间线 ---------- */
.page-about .about-timeline-section {
  color: var(--jn-paper);
  background:
    radial-gradient(80% 60% at 92% 8%, rgba(255, 77, 46, 0.14), transparent 62%),
    linear-gradient(180deg, var(--jn-ink) 0%, var(--jn-dai) 100%);
}

.page-about .about-timeline__head {
  display: grid;
  gap: 1rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-timeline__head .section-title {
  color: var(--jn-paper);
  margin: 0;
}

.page-about .about-timeline__glyph {
  color: rgba(244, 239, 230, 0.45);
  width: min(120px, 40vw);
  height: auto;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-rail);
  border-left: 2px solid rgba(244, 239, 230, 0.28);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(1.5rem, 3.5vw, 2.5rem);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  left: calc(var(--about-rail) * -1);
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--jn-gold);
  box-shadow: 0 0 0 4px var(--jn-ink);
}

.page-about .about-timeline__item--flame::before {
  background: var(--jn-flame);
}

.page-about .about-timeline__item--neon::before {
  background: var(--jn-neon);
}

.page-about .about-timeline__year {
  margin: 0 0 0.3rem;
  font-family: var(--jn-font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--jn-neon);
}

.page-about .about-timeline__title {
  margin: 0 0 0.45rem;
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--jn-paper);
}

.page-about .about-timeline__item p:last-child {
  margin: 0;
  max-width: 60ch;
  color: rgba(244, 239, 230, 0.82);
  font-size: 0.97rem;
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-team__media .media-frame {
  aspect-ratio: 4 / 3;
  box-shadow: var(--about-shadow);
}

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

.page-about .about-team__media .note {
  margin-top: 1.1rem;
  max-width: 34ch;
  border-left: 3px solid var(--jn-gold);
  padding-left: 0.85rem;
}

.page-about .about-team__body .section-title {
  margin: 0.35rem 0 0.9rem;
}

.page-about .about-team__body .lede {
  max-width: 52ch;
}

.page-about .about-team .tabs {
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-team .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 3px solid var(--jn-ink);
}

.page-about .about-team .tabs__tab {
  font-family: var(--jn-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  padding: 0.6rem 1rem;
  border: 2px solid var(--jn-ink);
  background: transparent;
  color: var(--jn-ink);
  cursor: pointer;
  transition: background var(--jn-dur) ease, color var(--jn-dur) ease, border-color var(--jn-dur) ease;
}

.page-about .about-team .tabs__tab:hover,
.page-about .about-team .tabs__tab:focus-visible {
  background: rgba(255, 77, 46, 0.14);
  border-color: var(--jn-cinnabar);
}

.page-about .about-team .tabs__tab[aria-selected="true"] {
  background: var(--jn-flame);
  border-color: var(--jn-flame);
  color: var(--jn-paper);
}

.page-about .about-team .tabs__panel {
  padding-top: clamp(1rem, 2.5vw, 1.5rem);
  max-width: 62ch;
}

.page-about .about-team .tabs__panel[hidden] {
  display: none;
}

.page-about .about-team .tabs__panel .sub-title {
  margin: 0 0 0.5rem;
  color: var(--jn-dai);
}

.page-about .about-team .tabs__panel p {
  margin: 0;
}

/* ---------- 校订标准 ---------- */
.page-about .about-standards {
  background:
    linear-gradient(90deg, rgba(217, 181, 109, 0.14) 0, rgba(217, 181, 109, 0) 42%),
    var(--jn-paper);
}

.page-about .about-standards__grid {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 3rem);
}

.page-about .about-standards__aside .section-title {
  margin: 0.4rem 0 0.85rem;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
}

.page-about .about-standards__panels .panel {
  border: 2px solid var(--jn-ink);
  background: rgba(255, 255, 255, 0.68);
}

.page-about .about-standards__panels .panel + .panel {
  margin-top: 0.85rem;
}

.page-about .about-standards__panels .panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 1rem 0.35rem 0;
}

.page-about .about-standards__panels .panel__trigger {
  margin: 0;
  font-size: 1rem;
}

.page-about .about-standards__panels .panel__trigger-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.9rem 1rem;
  border: 0;
  background: transparent;
  color: var(--jn-dai);
  font-family: var(--jn-font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.page-about .about-standards__panels .panel__trigger-btn:hover,
.page-about .about-standards__panels .panel__trigger-btn:focus-visible {
  color: var(--jn-flame);
}

.page-about .about-standards__panels .panel__icon {
  font-family: var(--jn-font-mono);
  color: var(--jn-flame);
  font-size: 1.1rem;
}

.page-about .about-standards__panels .panel__body {
  padding: 0 1rem 1.1rem;
  border-top: 1px dashed var(--jn-gray);
}

.page-about .about-standards__panels .panel__body p {
  margin: 0.9rem 0 0;
  max-width: 62ch;
  font-size: 0.97rem;
}

/* ---------- 湖南与生态 ---------- */
.page-about .about-hunan {
  color: var(--jn-paper);
  background:
    radial-gradient(90% 70% at 10% 0%, rgba(127, 224, 212, 0.14), transparent 60%),
    linear-gradient(160deg, var(--jn-mo) 0%, var(--jn-dai) 68%, var(--jn-plum) 100%);
}

.page-about .about-hunan .section-title {
  color: var(--jn-paper);
  margin: 0.4rem 0 1rem;
}

.page-about .about-hunan__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.page-about .about-hunan__body p {
  max-width: 56ch;
  color: rgba(244, 239, 230, 0.85);
}

.page-about .about-partners {
  list-style: none;
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-partners li {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  font-size: 0.9375rem;
  color: rgba(244, 239, 230, 0.9);
  border-bottom: 1px dashed rgba(244, 239, 230, 0.25);
  padding-bottom: 0.7rem;
}

.page-about .about-partners__num {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--jn-gold);
  min-width: 3.5ch;
}

.page-about .about-hunan__media {
  aspect-ratio: 7 / 4;
  border-color: rgba(244, 239, 230, 0.5);
  box-shadow: 9px 9px 0 rgba(18, 24, 26, 0.55);
}

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

.page-about .about-hunan__cards {
  display: grid;
  gap: clamp(0.85rem, 2vw, 1.25rem);
  margin-top: clamp(2rem, 5vw, 3.25rem);
}

.page-about .about-node {
  border: 2px solid rgba(244, 239, 230, 0.32);
  background: rgba(18, 24, 26, 0.3);
  padding: var(--jn-pad);
}

.page-about .about-node .index-label {
  color: var(--jn-neon);
  margin: 0;
}

.page-about .about-node .sub-title {
  margin: 0.5rem 0 0.55rem;
  color: var(--jn-paper);
}

.page-about .about-node p:last-child {
  margin: 0;
  font-size: 0.94rem;
  color: rgba(244, 239, 230, 0.82);
}

/* ---------- 持续运营 ---------- */
.page-about .about-honor__head .section-title {
  margin: 0.4rem 0 0.9rem;
}

.page-about .about-honor__head .lede {
  max-width: 58ch;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(0.75rem, 2vw, 1rem);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .about-stats .stat {
  display: grid;
  gap: 0.35rem;
  border: 2px solid var(--jn-ink);
  background: linear-gradient(180deg, #ffffff 0%, var(--jn-paper) 100%);
  padding: clamp(1rem, 2.2vw, 1.4rem);
}

.page-about .about-stats .stat__value {
  font-family: var(--jn-font-mono);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 700;
  color: var(--jn-dai);
  line-height: 1.1;
}

.page-about .about-stats .stat__label {
  font-size: 0.875rem;
  color: #414a4d;
}

.page-about .about-honor__note {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  border-left: 3px solid var(--jn-gold);
  padding-left: 0.85rem;
  max-width: 62ch;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  color: var(--jn-paper);
  background:
    radial-gradient(70% 80% at 88% 100%, rgba(255, 77, 46, 0.2), transparent 62%),
    linear-gradient(180deg, var(--jn-dai) 0%, var(--jn-ink) 100%);
}

.page-about .about-cta__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: center;
}

.page-about .about-cta .section-title {
  color: var(--jn-paper);
  margin: 0.4rem 0 0.9rem;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
}

.page-about .about-cta .lede {
  color: rgba(244, 239, 230, 0.85);
  margin: 0;
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-cta__note {
  margin-top: clamp(1.25rem, 3vw, 2rem);
  color: rgba(244, 239, 230, 0.72);
}

.page-about .about-cta__note a {
  color: var(--jn-neon);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-purpose {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: minmax(96px, 140px) minmax(0, 1fr);
    gap: clamp(1rem, 2.5vw, 2rem);
  }

  .page-about .about-timeline__year {
    text-align: right;
    margin-top: 0.15rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(180px, 250px) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-origin__aside {
    position: sticky;
    top: clamp(1.5rem, 4vw, 3rem);
    align-self: start;
  }

  .page-about .about-standards__grid {
    grid-template-columns: minmax(200px, 300px) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-standards__aside {
    position: sticky;
    top: clamp(1.5rem, 4vw, 3rem);
    align-self: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: clamp(2rem, 4.5vw, 3.75rem);
    align-items: start;
  }

  .page-about .about-hunan__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(2rem, 4.5vw, 3.5rem);
  }

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team .tabs__tab,
  .page-about .about-standards__panels .panel__trigger-btn {
    transition: none;
  }
}