.page-about {
  --about-rail-w: 170px;
  --about-tick-line: rgba(200, 242, 76, 0.3);
  --about-card-line: rgba(215, 220, 214, 0.12);
  --about-card-line-strong: rgba(215, 220, 214, 0.24);
  background: var(--night);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(115% 85% at 86% 8%, rgba(31, 107, 255, 0.22), transparent 60%),
    linear-gradient(158deg, var(--night) 0%, var(--night-deep) 100%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 42%;
  right: -18%;
  width: 62%;
  height: 46%;
  background: linear-gradient(118deg, rgba(255, 122, 33, 0.16), transparent 68%);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

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

.page-about .about-hero__title {
  margin: 0.7rem 0 1rem;
  max-width: 20em;
  font-size: clamp(1.85rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 38em;
  font-size: clamp(0.98rem, 2vw, 1.06rem);
  line-height: 1.78;
  color: var(--silver);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1rem;
  margin: 1.8rem 0 0;
}

.page-about .about-hero__facts > div {
  padding-top: 0.6rem;
  border-top: 2px solid rgba(31, 107, 255, 0.55);
}

.page-about .about-hero__facts dt {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-hero__facts dd {
  margin: 0.3rem 0 0;
  font-family: var(--font-num);
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .about-hero__media {
  margin: 0;
}

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

/* ---------- 时间线 ---------- */

.page-about .about-era {
  background: linear-gradient(180deg, var(--night-deep) 0%, var(--night) 100%);
  border-top: 1px solid var(--hair);
}

.page-about .about-era__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2.75rem);
}

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

.page-about .about-era__rail-note {
  margin: 0.5rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-era__ticks {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-era__ticks li {
  position: relative;
}

.page-about .about-era__ticks a {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--about-card-line-strong);
  border-radius: 999px;
  font-family: var(--font-num);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-era__ticks a:hover,
.page-about .about-era__ticks a:focus-visible {
  color: var(--night);
  background: var(--lime);
  border-color: var(--lime);
}

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

.page-about .about-era__entries {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(0.9rem, 2.4vw, 1.4rem);
}

.page-about .about-era__entry {
  position: relative;
  padding: clamp(1.1rem, 3vw, 1.6rem) clamp(1.1rem, 3vw, 1.7rem);
  background: var(--turf);
  border: 1px solid var(--about-card-line);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius-md);
  scroll-margin-top: 6rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about .about-era__entry:hover {
  transform: translateY(-4px);
  border-color: rgba(31, 107, 255, 0.5);
  box-shadow: var(--shadow-1);
}

.page-about .about-era__year {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-num);
  font-size: clamp(1.35rem, 3.4vw, 1.8rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-era__entry h3 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-era__entry p {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.75;
  color: var(--silver);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  background: linear-gradient(198deg, var(--night) 0%, var(--night-deep) 100%);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.4rem);
}

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

.page-about .about-team__root {
  display: inline-block;
  margin: 0;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  background: var(--blue);
  color: #FFFFFF;
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-about .about-team__nodes {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0 0 0 1.4rem;
  border-left: 2px dashed rgba(31, 107, 255, 0.5);
  display: grid;
  gap: 0.9rem;
}

.page-about .about-team__node {
  position: relative;
  padding: 1.05rem 1.15rem;
  background: var(--turf);
  border: 1px solid var(--about-card-line);
  border-radius: var(--radius-md);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-team__node::before {
  content: "";
  position: absolute;
  top: 1.6rem;
  left: -1.4rem;
  margin-left: -5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(31, 107, 255, 0.16);
}

.page-about .about-team__node:hover {
  transform: translateY(-4px);
  border-color: rgba(31, 107, 255, 0.55);
  box-shadow: var(--shadow-1);
}

.page-about .about-team__node h3 {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-team__count {
  margin: 0.35rem 0 0.6rem;
  font-family: var(--font-num);
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .about-team__node p:last-child {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.74;
  color: var(--silver);
}

.page-about .about-team__rhythm {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-team__rhythm li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.2rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--about-card-line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
}

.page-about .about-team__rhythm strong {
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  color: var(--blue);
  font-weight: 800;
}

.page-about .about-team__rhythm span {
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-team__media {
  margin: 0;
}

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

/* ---------- 合作生态 ---------- */

.page-about .about-partners__list {
  list-style: none;
  margin: clamp(1.4rem, 4vw, 2.2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-partner {
  padding: 1.25rem 1.3rem 1.35rem;
  border-radius: var(--radius-md);
  background: #FFFCF4;
  border: 1px solid rgba(16, 22, 26, 0.14);
  border-top: 4px solid var(--blue);
  box-shadow: 0 6px 18px rgba(16, 22, 26, 0.06);
}

.page-about .about-partner--media {
  border-top-color: var(--orange);
}

.page-about .about-partner h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-partner__count {
  margin: 0.35rem 0 0.65rem;
  font-family: var(--font-num);
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  color: var(--blue-deep);
}

.page-about .about-partner--media .about-partner__count {
  color: #C24E0A;
}

.page-about .about-partner p:last-child {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-partners__note {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--lime);
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-partners__note a {
  color: var(--blue-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-partners__note a:hover {
  color: var(--orange);
}

/* ---------- 档案库 ---------- */

.page-about .about-archive {
  background: linear-gradient(180deg, var(--night-deep) 0%, var(--night) 100%);
  border-top: 1px solid var(--hair);
}

.page-about .about-archive__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

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

.page-about .about-archive__keys {
  list-style: none;
  margin: clamp(1.3rem, 3.5vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-archive__keys li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.15rem;
  padding: 0.8rem 1rem;
  background: var(--turf);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--lime);
}

.page-about .about-archive__k {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-archive__v {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-archive__note {
  margin: 1.2rem 0 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--silver);
}

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

.page-about .about-archive__media {
  margin: 0;
}

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

.page-about .about-archive__wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 0.55rem;
  margin-top: 1rem;
}

.page-about .about-archive__badge {
  display: block;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 2px solid var(--about-card-line-strong);
  background: radial-gradient(circle at 50% 40%, rgba(200, 242, 76, 0.08), transparent 68%);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-archive__badge:hover {
  border-color: var(--lime);
  transform: translateY(-3px);
}

/* ---------- 读者构成 ---------- */

.page-about .about-audience {
  background: linear-gradient(160deg, var(--night) 0%, var(--turf) 130%);
}

.page-about .about-audience__figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.9rem;
  margin-top: clamp(1.4rem, 4vw, 2.2rem);
}

.page-about .about-audience__fig {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius-md);
  background: rgba(8, 34, 25, 0.6);
  border: 1px solid var(--about-card-line);
  border-bottom: 3px solid var(--orange);
}

.page-about .about-audience__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .about-audience__cap {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-audience__note {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  max-width: 44em;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .about-audience__note a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-audience__note a:hover {
  color: var(--orange);
}

/* ---------- 接下来 ---------- */

.page-about .about-next__list {
  list-style: none;
  margin: clamp(1.4rem, 4vw, 2.2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-next__item {
  position: relative;
  padding: 1.2rem 1.25rem 1.3rem 1.4rem;
  border-radius: var(--radius-md);
  background: #FFFCF4;
  border: 1px solid rgba(16, 22, 26, 0.14);
  border-left: 4px solid var(--lime);
}

.page-about .about-next__idx {
  display: block;
  font-family: var(--font-num);
  font-size: 0.9rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-next__item h3 {
  margin: 0.4rem 0 0.5rem;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-next__item p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 结尾行动 ---------- */

.page-about .about-cta {
  background: var(--night-deep);
}

.page-about .about-cta__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.3rem, 4vw, 2.2rem);
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 120% at 12% 10%, rgba(31, 107, 255, 0.24), transparent 62%),
    linear-gradient(140deg, var(--turf) 0%, var(--night) 100%);
  border: 1px solid var(--about-card-line);
}

.page-about .about-cta__text h2 {
  margin: 0.6rem 0 0.7rem;
  font-size: clamp(1.4rem, 3.6vw, 2.05rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 42em;
  font-size: 0.97rem;
  line-height: 1.78;
  color: var(--silver);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-content: start;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 760px) {
  .page-about .about-partners__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-era__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-era__rail {
    position: sticky;
    top: 5.5rem;
  }

  .page-about .about-era__ticks {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 1.15rem;
    margin-top: 1.1rem;
    padding-left: 1.15rem;
    border-left: 2px solid var(--about-tick-line);
  }

  .page-about .about-era__ticks li::before {
    content: "";
    position: absolute;
    top: 0.5rem;
    left: -1.15rem;
    margin-left: -5px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--lime);
    box-shadow: 0 0 0 4px rgba(200, 242, 76, 0.14);
  }

  .page-about .about-era__ticks a {
    padding: 0;
    border: 0;
    border-radius: 0;
    font-size: 1.06rem;
    background: transparent;
  }

  .page-about .about-era__ticks a:hover,
  .page-about .about-era__ticks a:focus-visible {
    background: transparent;
    color: var(--lime);
  }

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

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

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: center;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 940px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-archive__keys {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-era__entry,
  .page-about .about-team__node,
  .page-about .about-archive__badge,
  .page-about .about-era__ticks a {
    transition: none;
  }

  .page-about .about-era__entry:hover,
  .page-about .about-team__node:hover,
  .page-about .about-archive__badge:hover {
    transform: none;
  }
}