.page-about {
  --ab-ink-soft: rgba(17, 22, 26, 0.66);
  --ab-line: rgba(17, 22, 26, 0.16);
  --ab-strong: rgba(17, 22, 26, 0.88);
  --ab-cyan-ink: #0a6f5d;
  background: var(--np-paper);
  color: var(--np-ink);
  overflow-x: clip;
}

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

.page-about :focus-visible {
  outline: 2px solid var(--np-cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--np-header-h) + clamp(28px, 5vw, 56px));
  padding-bottom: clamp(36px, 6vw, 76px);
  padding-inline: var(--np-gutter);
  background-color: var(--np-night);
  background-image:
    linear-gradient(180deg, rgba(10, 31, 51, 0.12) 0%, rgba(10, 31, 51, 0.94) 78%),
    repeating-linear-gradient(115deg, rgba(56, 242, 196, 0.07) 0 2px, transparent 2px 104px);
  color: var(--np-white);
  border-bottom: 2px solid var(--np-cyan);
}

.page-about .about-hero .np-breadcrumb {
  color: var(--np-steel);
}

.page-about .about-hero .np-breadcrumb a {
  color: var(--np-steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-hero .np-breadcrumb a:hover {
  color: var(--np-cyan);
  border-bottom-color: var(--np-cyan);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__head {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--np-font-display);
  font-weight: 700;
  font-size: clamp(30px, 6vw, 60px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--np-white);
  text-shadow: 3px 3px 0 rgba(56, 242, 196, 0.24);
  overflow-wrap: break-word;
}

.page-about .about-hero__text {
  min-width: 0;
}

.page-about .about-hero .np-lede {
  color: var(--np-white);
}

.page-about .about-hero .np-body {
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 1px;
  background: rgba(154, 169, 175, 0.3);
  border: 2px solid rgba(56, 242, 196, 0.32);
}

.page-about .about-hero__stats > div {
  background: var(--np-deep);
  padding: 14px 16px 16px;
}

.page-about .about-hero__stats dt {
  font-family: var(--np-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--np-steel);
}

.page-about .about-hero__stats dd {
  margin: 8px 0 0;
  font-family: var(--np-font-mono);
  font-size: clamp(19px, 3vw, 27px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--np-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__figure {
  margin: clamp(26px, 4vw, 46px) 0 0;
  border: 2px solid rgba(56, 242, 196, 0.35);
  box-shadow: var(--np-shadow-hard);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-hero__figure .np-media__caption {
  background: var(--np-deep);
  color: var(--np-steel);
  padding: 10px 14px;
  font-size: 13px;
}

/* ---------- 通用分栏 ---------- */

.page-about .about-what,
.page-about .about-team,
.page-about .about-fields {
  padding-block: clamp(40px, 7vw, 88px);
  padding-inline: var(--np-gutter);
  background: var(--np-paper);
}

.page-about .about-fields {
  border-top: 2px solid var(--ab-strong);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-note {
  border-top: 2px solid var(--ab-strong);
  padding-top: 12px;
  font-family: var(--np-font-mono);
  font-size: 12px;
  line-height: 1.95;
  letter-spacing: 0.06em;
  color: var(--ab-ink-soft);
}

.page-about .about-note .np-tag {
  display: inline-block;
  margin-bottom: 10px;
}

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

.page-about .about-body {
  min-width: 0;
}

.page-about .about-body .np-h2 {
  margin-top: 0;
  color: var(--np-ink);
}

.page-about .about-body .np-lede {
  color: var(--ab-strong);
}

.page-about .about-body .np-body {
  color: var(--ab-ink-soft);
}

.page-about .about-body a {
  color: var(--ab-cyan-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .about-body a:hover {
  color: var(--np-ink);
  text-decoration-color: var(--np-cyan);
  text-decoration-thickness: 2px;
}

/* ---------- 版本演进 ---------- */

.page-about .about-versions {
  padding-block: clamp(44px, 7vw, 92px);
  padding-inline: var(--np-gutter);
  background: var(--np-deep);
  color: var(--np-white);
  border-top: 2px solid var(--np-cyan);
  border-bottom: 2px solid rgba(154, 169, 175, 0.24);
}

.page-about .about-versions__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-versions__rail {
  min-width: 0;
}

.page-about .about-versions .np-h2 {
  color: var(--np-white);
  margin-top: 12px;
}

.page-about .about-versions .np-body {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-versions .np-eyebrow {
  color: var(--np-cyan);
}

.page-about .about-versions__figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 2px solid rgba(56, 242, 196, 0.3);
  box-shadow: var(--np-shadow-hard-sm);
}

.page-about .about-versions__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .about-versions__figure .np-media__caption {
  background: var(--np-raise);
  color: var(--np-steel);
  padding: 10px 14px;
  font-size: 13px;
}

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

.page-about .about-timeline__item {
  padding-bottom: clamp(20px, 3vw, 28px);
  border-bottom: 1px solid rgba(154, 169, 175, 0.24);
}

.page-about .about-timeline__item + .about-timeline__item {
  padding-top: clamp(20px, 3vw, 28px);
}

.page-about .about-timeline__ver {
  display: block;
  font-family: var(--np-font-mono);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  color: var(--np-cyan);
  margin-bottom: 10px;
}

.page-about .about-timeline__item .np-h3 {
  margin: 0 0 8px;
  color: var(--np-white);
}

.page-about .about-timeline__item .np-body {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 15px;
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 22px);
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-team__card {
  background: var(--np-white);
  border: 2px solid var(--ab-strong);
  box-shadow: 6px 6px 0 rgba(17, 22, 26, 0.14);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.page-about .about-team__card[open] {
  border-color: var(--np-ink);
  box-shadow: 8px 8px 0 rgba(17, 22, 26, 0.2);
}

.page-about .about-team__card summary {
  display: block;
  cursor: pointer;
  padding: 18px 18px 16px;
  list-style: none;
}

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

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

.page-about .about-team__num {
  display: inline-block;
  background: var(--np-cyan);
  color: var(--np-ink);
  font-family: var(--np-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 3px 8px;
}

.page-about .about-team__name {
  display: block;
  margin-top: 12px;
  font-family: var(--np-font-display);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--np-ink);
}

.page-about .about-team__desc {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ab-ink-soft);
}

.page-about .about-team__duties {
  margin: 0;
  padding: 0 18px 18px;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-about .about-team__duties li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(17, 22, 26, 0.8);
}

.page-about .about-team__duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--np-cyan);
}

/* ---------- 十八个字段 ---------- */

.page-about .about-fields__big {
  display: block;
  font-family: var(--np-font-mono);
  font-size: clamp(64px, 14vw, 116px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--ab-strong);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fields__big::after {
  content: "";
  display: block;
  width: 52px;
  height: 6px;
  margin-top: 14px;
  background: var(--np-cyan);
}

.page-about .about-fields__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(22px, 3vw, 32px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 2px solid var(--ab-line);
}

.page-about .about-field {
  min-width: 0;
}

.page-about .about-field__k {
  display: inline-block;
  margin-bottom: 8px;
  padding-left: 8px;
  border-left: 3px solid var(--np-cyan);
  font-family: var(--np-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ab-cyan-ink);
}

.page-about .about-field p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(17, 22, 26, 0.78);
}

/* ---------- 项目覆盖 ---------- */

.page-about .about-cats {
  padding-block: clamp(44px, 7vw, 92px);
  padding-inline: var(--np-gutter);
  background: var(--np-indigo);
  color: var(--np-white);
  border-top: 2px solid var(--np-cyan);
}

.page-about .about-cats .np-h2 {
  color: var(--np-white);
  margin-top: 0;
}

.page-about .about-cats .np-lede {
  color: rgba(255, 255, 255, 0.8);
}

.page-about .about-cats__figure {
  margin: 0 0 clamp(24px, 3.5vw, 40px);
  border: 2px solid rgba(56, 242, 196, 0.32);
  box-shadow: var(--np-shadow-hard);
}

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

.page-about .about-cats__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-cat {
  border: 2px solid rgba(154, 169, 175, 0.32);
  background: rgba(255, 255, 255, 0.04);
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-cat[open],
.page-about .about-cat:hover {
  border-color: var(--np-cyan);
  background: rgba(56, 242, 196, 0.08);
}

.page-about .about-cat summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-about .about-cat__name {
  font-family: var(--np-font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--np-white);
}

.page-about .about-cat__count {
  font-family: var(--np-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--np-cyan);
  white-space: nowrap;
}

.page-about .about-cat__body {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(255, 255, 255, 0.76);
}

.page-about .about-cats__note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-top: 16px;
  border-top: 2px solid rgba(56, 242, 196, 0.32);
  font-family: var(--np-font-serif);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.86);
}

/* ---------- 结尾 ---------- */

.page-about .about-next {
  padding-block: clamp(44px, 7vw, 92px);
  padding-inline: var(--np-gutter);
  background: var(--np-wine);
  color: var(--np-white);
  border-top: 2px solid var(--np-cyan);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 44px);
}

.page-about .about-next .np-eyebrow {
  color: var(--np-cyan);
}

.page-about .about-next .np-h2 {
  color: var(--np-white);
  margin-top: 12px;
}

.page-about .about-next .np-body {
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-next .np-body a {
  color: var(--np-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-fields__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(24px, 4vw, 60px);
  }

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

  .page-about .about-split {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    gap: clamp(24px, 4vw, 56px);
  }

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

  .page-about .about-team__card:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 52px;
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-versions__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1024px) {
  .page-about .about-cats__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1240px) {
  .page-about .about-hero,
  .page-about .about-what,
  .page-about .about-versions,
  .page-about .about-team,
  .page-about .about-fields,
  .page-about .about-cats,
  .page-about .about-next {
    padding-inline: 0;
  }
}

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