.page-about {
  --about-rail-w: 116px;
  --about-radius: 18px;
  --about-radius-lg: 24px;
  background: var(--ink);
  color: var(--white);
  padding-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.8rem, 5vw, 3.4rem) 0 clamp(2.2rem, 5.5vw, 4rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(255, 78, 66, 0.22), transparent 58%),
    radial-gradient(90% 70% at 6% 12%, rgba(43, 227, 180, 0.1), transparent 62%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -6%;
  top: -22%;
  width: min(54%, 560px);
  height: 152%;
  background: linear-gradient(155deg, rgba(255, 176, 32, 0.16), rgba(255, 78, 66, 0.06) 55%, transparent 78%);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(0.8rem, 2vw, 1.2rem);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 6.2vw, 3.9rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0.5rem 0 1rem;
  max-width: 20ch;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  max-width: 60ch;
  font-size: clamp(1rem, 2.2vw, 1.12rem);
  line-height: 1.75;
  color: var(--steel);
  margin: 0;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-stat {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  padding: 1rem 1.05rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 4.4vw, 2.35rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.page-about .about-stat:nth-child(1) .about-stat__num,
.page-about .about-stat:nth-child(3) .about-stat__num {
  color: var(--coral);
}

.page-about .about-stat__unit {
  font-size: 0.55em;
  margin-left: 0.06em;
  color: var(--teal);
}

.page-about .about-stat__label {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 双栏档案册 ---------- */
.page-about .dossier {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 1.2rem;
}

.page-about .dossier-rail {
  position: sticky;
  top: var(--header-h);
  z-index: 8;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 0;
  margin-bottom: 0.6rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  background: linear-gradient(180deg, rgba(11, 16, 32, 0.97) 72%, rgba(11, 16, 32, 0));
}

.page-about .dossier-rail::-webkit-scrollbar {
  display: none;
}

.page-about .dossier-rail__cap {
  display: none;
}

.page-about .dossier-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.page-about .rail-node {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.38rem 0.78rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--steel);
  font-size: 0.8rem;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) ease, border-color var(--dur) ease, background var(--dur) ease;
}

.page-about .rail-node:hover,
.page-about .rail-node:focus-visible {
  color: var(--white);
  border-color: var(--coral);
  background: rgba(255, 78, 66, 0.14);
}

.page-about .rail-node__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.76rem;
  color: var(--coral);
  letter-spacing: -0.02em;
}

.page-about .rail-node__label {
  font-size: 0.78rem;
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding: clamp(2.2rem, 5vw, 3.8rem) 0;
  border-top: 1px solid var(--line);
}

.page-about .chapter:first-child {
  border-top: 0;
  padding-top: clamp(1.4rem, 3vw, 2.2rem);
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: clamp(0.7rem, 2vw, 1.1rem);
  margin-bottom: clamp(0.9rem, 2.4vw, 1.5rem);
  flex-wrap: wrap;
}

.page-about .chapter__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 5.6vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--coral);
  text-shadow: 0 0 28px rgba(255, 78, 66, 0.28);
}

.page-about .chapter__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 3.4vw, 2.05rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--white);
  margin: 0;
  max-width: 22ch;
}

.page-about .chapter__lede {
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--steel);
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .chapter__foot {
  max-width: 68ch;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--steel);
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid rgba(255, 176, 32, 0.5);
}

.page-about .chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.1rem, 3vw, 1.8rem);
  align-items: start;
}

.page-about .chapter__grid + .chapter__grid {
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .prose p {
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(247, 245, 240, 0.88);
  margin: 0 0 1rem;
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 侧注 ---------- */
.page-about .about-aside {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--about-radius);
  padding: 1rem 1.15rem 1.15rem;
}

.page-about .about-aside--teal {
  border-left-color: var(--teal);
}

.page-about .about-aside__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
  margin: 0 0 0.5rem;
}

.page-about .about-aside--teal .about-aside__num {
  color: var(--teal);
  font-size: clamp(1.2rem, 3.2vw, 1.6rem);
}

.page-about .about-aside__text {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--steel);
  margin: 0;
}

/* ---------- 引文 ---------- */
.page-about .pull-quote {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.7vw, 1.75rem);
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--gold);
  margin: clamp(1.4rem, 3.5vw, 2.2rem) 0;
  padding: 0.1rem 0 0.1rem 1.1rem;
  border-left: 3px solid var(--coral);
  max-width: 40ch;
}

/* ---------- 采编流程 ---------- */
.page-about .process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .process__step {
  position: relative;
  margin-left: 1rem;
  padding: 0 0 1.6rem 2.1rem;
  border-left: 2px solid var(--line);
}

.page-about .process__step:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .process__idx {
  position: absolute;
  left: -1.02rem;
  top: -0.15rem;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--coral);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--coral);
  letter-spacing: -0.02em;
}

.page-about .process__step:nth-child(3) .process__idx,
.page-about .process__step:nth-child(5) .process__idx {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .process__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 0.35rem;
}

.page-about .process__step p {
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--steel);
  margin: 0;
}

/* ---------- 时间线 ---------- */
.page-about .chronicle {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .chronicle::before {
  content: "";
  position: absolute;
  left: 3.9rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 78, 66, 0.75), rgba(255, 176, 32, 0.75) 55%, rgba(43, 227, 180, 0.75));
}

.page-about .chronicle__item {
  position: relative;
  display: grid;
  grid-template-columns: 3.9rem minmax(0, 1fr);
  gap: 1.5rem;
  padding-bottom: 1.7rem;
}

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

.page-about .chronicle__item::before {
  content: "";
  position: absolute;
  left: 3.9rem;
  top: 0.55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--coral);
  border: 2px solid var(--ink);
  transform: translateX(-50%);
}

.page-about .chronicle__item:nth-child(2)::before {
  background: var(--gold);
}

.page-about .chronicle__item:nth-child(3)::before {
  background: var(--teal);
}

.page-about .chronicle__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.03em;
  color: var(--white);
  text-align: right;
  padding-top: 0.15rem;
}

.page-about .chronicle__content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 0.4rem;
}

.page-about .chronicle__content > p {
  max-width: 58ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--steel);
  margin: 0;
}

.page-about .chronicle__more {
  margin-top: 0.55rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--line);
}

.page-about .chronicle__more summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--teal);
  list-style: none;
}

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

.page-about .chronicle__more summary::before {
  content: "▸ ";
  color: var(--teal);
}

.page-about .chronicle__more[open] summary::before {
  content: "▾ ";
}

.page-about .chronicle__more p {
  max-width: 58ch;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(154, 166, 194, 0.92);
  margin: 0.5rem 0 0;
}

/* ---------- 奶油纸面团队区 ---------- */
.page-about .about-paper {
  background: var(--paper);
  color: var(--brown);
  border-radius: var(--about-radius-lg);
  padding: clamp(1.2rem, 3.4vw, 2.2rem);
  box-shadow: 0 26px 60px -34px rgba(0, 0, 0, 0.85);
}

.page-about .about-paper__lede {
  max-width: 62ch;
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  font-weight: 700;
  line-height: 1.72;
  color: var(--brown);
  margin: 0 0 clamp(1rem, 2.6vw, 1.5rem);
}

.page-about .team-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
}

.page-about .team-card {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--sand);
  border-radius: var(--about-radius);
  padding: 0.9rem 1rem 1rem;
}

.page-about .team-card__num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--stamp);
  margin: 0 0 0.45rem;
}

.page-about .team-card__text {
  font-size: 0.9rem;
  line-height: 1.72;
  color: rgba(42, 31, 25, 0.86);
  margin: 0;
}

/* ---------- 图像 ---------- */
.page-about .about-figure {
  margin: clamp(1.3rem, 3.2vw, 2rem) 0 0;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-about .chapter__grid--media {
  align-items: stretch;
}

.page-about .about-figure--side {
  margin: 0;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(2rem, 5vw, 3.4rem);
  padding: clamp(2.2rem, 5.5vw, 3.6rem) 0;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(90% 130% at 8% 0%, rgba(255, 78, 66, 0.18), transparent 62%),
    linear-gradient(180deg, var(--panel), var(--ink));
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.6vw, 2.2rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0.4rem 0 0.8rem;
  max-width: 20ch;
}

.page-about .about-cta__text {
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--steel);
  margin: 0 0 1.4rem;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .chapter__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.44fr);
  }

  .page-about .chapter__grid--media {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
    gap: clamp(1.2rem, 3vw, 2.2rem);
  }
}

@media (min-width: 960px) {
  .page-about .dossier {
    grid-template-columns: calc(var(--about-rail-w) + 22px) minmax(0, 1fr);
    gap: clamp(1.4rem, 3.6vw, 3rem);
    align-items: start;
    padding-top: 2rem;
  }

  .page-about .dossier-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.6rem);
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    margin-bottom: 0;
    padding: 0.4rem 0 0.4rem 1.1rem;
    overflow: visible;
    background: none;
    border-left: 2px solid var(--line);
  }

  .page-about .dossier-rail__cap {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.2em;
    color: var(--steel);
    margin-bottom: 0.4rem;
  }

  .page-about .dossier-rail__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.34rem;
  }

  .page-about .rail-node {
    justify-content: flex-start;
    border-radius: 8px;
    border-color: transparent;
    background: none;
    padding: 0.32rem 0.5rem;
  }

  .page-about .rail-node:hover,
  .page-about .rail-node:focus-visible {
    background: rgba(255, 78, 66, 0.12);
    border-color: transparent;
  }

  .page-about .chapter:first-child {
    padding-top: 0;
  }

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

  .page-about .about-paper {
    padding: clamp(1.8rem, 3vw, 2.6rem);
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    font-size: clamp(2.6rem, 5.2vw, 4.2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-node,
  .page-about .about-figure img {
    transition: none;
  }
}