.page-about {
  --about-rail-w: 268px;
  --about-line: var(--abyss-700);
  position: relative;
  background: var(--abyss-900);
  color: var(--ink-050);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 34px);
}
.page-about .crumb-link {
  color: var(--ink-300);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .crumb-link:hover,
.page-about .crumb-link:focus-visible {
  color: var(--coral-400);
  border-color: var(--coral-400);
}

/* ---------- 首屏：斜切色块 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(34px, 5vw, 62px) clamp(52px, 7vw, 100px);
  overflow: hidden;
}
.page-about .about-hero__slab {
  position: absolute;
  inset: -18% -22% auto -22%;
  height: 132%;
  z-index: -1;
  pointer-events: none;
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 98%);
  background:
    radial-gradient(120% 82% at 8% 0%, rgba(79, 209, 176, 0.16), transparent 62%),
    conic-gradient(from 212deg at 80% 26%, rgba(255, 106, 61, 0.20), transparent 36%),
    linear-gradient(162deg, var(--abyss-800), var(--abyss-900) 72%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-about .about-hero__body .eyebrow {
  color: var(--celadon-400);
}
.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(1.85rem, 5.2vw, 3.4rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
  max-width: 22em;
}
.page-about .about-hero .lead {
  margin-top: 20px;
  max-width: 34em;
  color: var(--ink-300);
  line-height: 1.85;
}

.page-about .about-facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .about-fact {
  background: var(--abyss-800);
  padding: 16px 18px 18px;
}
.page-about .about-fact dt {
  font-size: 0.71rem;
  letter-spacing: 0.18em;
  color: var(--ink-300);
  margin-bottom: 10px;
}
.page-about .about-fact dd {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 900;
  line-height: 1;
  color: var(--ink-050);
}

/* ---------- 分屏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 42px;
  padding-bottom: clamp(60px, 9vw, 120px);
}

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

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(38px, 6vw, 62px);
  border-top: 1px solid var(--about-line);
  scroll-margin-top: 120px;
}
.page-about .about-chapter:first-child {
  border-top: none;
  padding-top: clamp(16px, 3vw, 30px);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 22px;
}
.page-about .about-chapter__num {
  font-size: clamp(2.5rem, 7vw, 4.2rem);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--about-line);
  transition: -webkit-text-stroke-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-about .about-chapter[data-active] .about-chapter__num {
  -webkit-text-stroke-color: var(--coral-500);
  color: rgba(255, 106, 61, 0.07);
}
.page-about .about-chapter__note {
  position: relative;
  margin: 0;
  padding-top: 24px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--ink-300);
  white-space: nowrap;
}
.page-about .about-chapter__note::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 2px;
  height: 12px;
  background: var(--coral-500);
}

.page-about .about-chapter__body > h2 {
  margin: 0 0 18px;
  font-size: clamp(1.32rem, 3.4vw, 1.95rem);
  font-weight: 800;
  line-height: 1.3;
}
.page-about .about-chapter__body > p {
  max-width: 34em;
  line-height: 1.85;
  color: var(--ink-050);
  margin: 0 0 16px;
}
.page-about .about-chapter__body > p:last-of-type {
  margin-bottom: 0;
}
.page-about .about-intro {
  color: var(--ink-300);
}

.page-about .inline-link {
  color: var(--celadon-400);
  text-decoration: none;
  border-bottom: 1px solid var(--celadon-600);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .inline-link:hover,
.page-about .inline-link:focus-visible {
  color: var(--coral-400);
  border-color: var(--coral-400);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
}
.page-about .about-figure .frame {
  border: 1px solid var(--about-line);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-figure .frame-cap {
  margin-top: 12px;
  color: var(--ink-300);
}
.page-about .about-figure--narrow {
  max-width: 720px;
}

/* ---------- 历程刻度 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0 0 0 28px;
  border-left: 1px solid var(--about-line);
  display: grid;
  gap: 30px;
}
.page-about .timeline-item {
  position: relative;
}
.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--abyss-900);
  border: 2px solid var(--coral-500);
}
.page-about .timeline-year {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 900;
  line-height: 1;
  color: var(--coral-400);
}
.page-about .timeline-title {
  margin: 8px 0 6px;
  font-size: 1rem;
  font-weight: 700;
}
.page-about .timeline-text {
  margin: 0;
  max-width: 34em;
  color: var(--ink-300);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* ---------- 片区结构 ---------- */
.page-about .zone-wrap {
  position: relative;
  margin-top: 26px;
  padding: 4px 0;
  overflow: hidden;
}
.page-about .zone-wrap::before {
  content: "";
  position: absolute;
  right: -90px;
  top: -70px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.72;
  background: repeating-radial-gradient(
    circle,
    transparent 0 40px,
    rgba(22, 48, 79, 0.85) 40px 41px
  );
}
.page-about .zone-grid {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .zone-cell {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
  min-height: 104px;
  padding: 16px 15px 15px;
  border: 1px solid var(--about-line);
  background:
    radial-gradient(140% 150% at 100% 0%, rgba(79, 209, 176, 0.11), transparent 62%),
    var(--abyss-800);
}
.page-about .zone-cell:nth-child(2n) {
  background:
    radial-gradient(140% 150% at 100% 0%, rgba(255, 106, 61, 0.13), transparent 62%),
    var(--abyss-800);
}
.page-about .zone-idx {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink-300);
}
.page-about .zone-name {
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  font-weight: 800;
  letter-spacing: 0.08em;
}

/* ---------- 维护小组 ---------- */
.page-about .crew-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .crew-step {
  position: relative;
  padding: 20px 18px 20px 20px;
  border: 1px solid var(--about-line);
  border-left: 2px solid var(--celadon-600);
  background: var(--abyss-800);
}
.page-about .crew-num {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--celadon-400);
  margin-bottom: 12px;
}
.page-about .crew-title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 800;
}
.page-about .crew-text {
  margin: 0;
  color: var(--ink-300);
  font-size: 0.93rem;
  line-height: 1.75;
}

.page-about .crew-tags {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .crew-tag {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border: 1px solid var(--about-line);
  background: var(--abyss-950);
  font-size: 0.92rem;
  color: var(--ink-300);
}
.page-about .crew-tag .tag {
  flex: none;
}

/* ---------- 原则 ---------- */
.page-about .principle-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  counter-reset: none;
}
.page-about .principle {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .principle:last-child {
  border-bottom: 1px solid var(--about-line);
}
.page-about .principle-num {
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--coral-500);
}
.page-about .principle-title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 800;
}
.page-about .principle p {
  margin: 0;
  max-width: 34em;
  color: var(--ink-300);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  margin-top: 34px;
  padding: 22px 20px;
  border: 1px solid var(--about-line);
  background: var(--abyss-950);
  box-shadow: 8px -8px 0 -1px var(--abyss-950), 8px -8px 0 0 var(--about-line);
}
.page-about .about-next__title {
  margin: 0 0 16px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--ink-300);
}
.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .next-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--about-line);
  background: var(--abyss-800);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .next-link__label {
  font-weight: 700;
  color: var(--ink-050);
  font-size: 0.98rem;
}
.page-about .next-link__note {
  font-size: 0.83rem;
  color: var(--ink-300);
  letter-spacing: 0.04em;
}
.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--coral-500);
  background: var(--abyss-700);
}

/* ---------- 右侧索引轨道 ---------- */
.page-about .about-rail {
  min-width: 0;
  display: grid;
  gap: 18px;
  align-content: start;
}
.page-about .about-rail__card {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--about-line);
  background: var(--abyss-800);
  box-shadow: 8px -8px 0 -1px var(--abyss-900), 8px -8px 0 0 var(--about-line);
}
.page-about .rail-title {
  margin: 0 0 16px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--ink-300);
}
.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-about .rail-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 8px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .rail-num {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink-300);
  transition: color var(--dur) var(--ease);
}
.page-about .rail-text {
  font-size: 0.92rem;
  color: var(--ink-050);
}
.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  border-left-color: var(--coral-500);
  background: var(--abyss-950);
}
.page-about .rail-link:hover .rail-num,
.page-about .rail-link:focus-visible .rail-num {
  color: var(--coral-400);
}

.page-about .about-console {
  border: 1px solid var(--about-line);
  background: var(--abyss-950);
  padding: 6px 14px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .zone-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .crew-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) var(--about-rail-w);
    gap: 60px;
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }
  .page-about .about-chapter__head {
    gap: 22px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero {
    padding-bottom: clamp(80px, 8vw, 130px);
  }
  .page-about .about-chapter {
    padding-block: clamp(52px, 5vw, 78px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chapter__num,
  .page-about .rail-num,
  .page-about .rav-link,
  .page-about .crumb-link,
  .page-about .inline-link,
  .page-about .next-link {
    transition-duration: 1ms;
  }
  .page-about .zone-wrap::before {
    opacity: 0.5;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>