.page-about {
  --about-rail-w: 196px;
  --about-gutter: clamp(1.5rem, 4vw, 4rem);
  --about-soft-text: rgba(242, 239, 230, 0.86);
  display: block;
  background-color: var(--ink-green);
  color: var(--bone-white);
}

/* ---------- 页首 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background-image: var(--glow-gradient);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background-image: linear-gradient(90deg, var(--signal-cyan), var(--ember-orange));
  transform: skewY(-0.4deg);
  transform-origin: left bottom;
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .about-crumbs a {
  color: var(--slate);
  text-decoration: none;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--signal-cyan);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-eyebrow {
  margin: 0 0 1rem;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal-cyan);
}

.page-about .about-hero-copy h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.9rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.01em;
  text-transform: none;
  color: var(--bone-white);
}

.page-about .about-hero-lede {
  max-width: 34em;
  margin: 1.4rem 0 0;
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.8;
  color: var(--about-soft-text);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.9rem;
}

.page-about .about-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--line-strong);
  border: 1px solid var(--line-strong);
  align-self: end;
}

.page-about .about-board-cell {
  padding: 1.15rem 1.1rem 1.25rem;
  background-color: rgba(11, 32, 24, 0.74);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-about .about-board-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 5vw, 2.9rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--signal-cyan);
}

.page-about .about-board-num--ember {
  color: var(--ember-orange);
}

.page-about .about-board-num--amber {
  color: var(--amber);
}

.page-about .about-board-label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--slate);
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5.5rem);
}

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

.page-about .about-rail {
  align-self: start;
}

.page-about .about-rail-title {
  margin: 0 0 0.8rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .about-rail-list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.5rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line);
  background-color: rgba(11, 32, 24, 0.5);
  color: rgba(242, 239, 230, 0.72);
  font-size: 0.875rem;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--bone-white);
  border-color: var(--line-strong);
}

.page-about .about-rail-num {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--ember-orange);
}

/* ---------- 章节 ---------- */

.page-about .about-section {
  padding: 0 0 clamp(2.25rem, 4.5vw, 3.5rem);
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-section-head {
  margin-bottom: 1.4rem;
}

.page-about .about-kicker {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .about-h2 {
  margin: 0.65rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--bone-white);
}

.page-about .about-h3 {
  margin: 0 0 0.45rem;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--bone-white);
}

.page-about .about-p {
  max-width: 38em;
  margin: 0 0 1rem;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--about-soft-text);
}

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

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

.page-about .about-p a:hover,
.page-about .about-p a:focus-visible {
  color: var(--mist-cyan);
}

/* ---------- 角色分工 ---------- */

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  background-color: var(--line);
}

.page-about .about-role {
  padding: 1.1rem 1.15rem 1.2rem;
  background-color: rgba(22, 48, 42, 0.62);
}

.page-about .about-role-tag {
  margin: 0 0 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-role-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--about-soft-text);
}

/* ---------- 图示 ---------- */

.page-about .about-figure {
  margin: 1.9rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(0.92) contrast(1.03);
}

.page-about .about-figcap {
  margin-top: 0.7rem;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .about-figure--wide {
  margin-top: 0;
  margin-bottom: 1.6rem;
}

.page-about .about-figure--wide img {
  aspect-ratio: 16 / 6;
}

/* ---------- 数据来源 ---------- */

.page-about .about-sources {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 1.6rem 0 0;
  background-color: var(--line);
}

.page-about .about-source {
  padding: 1.35rem 1.2rem 1.45rem;
  background-color: var(--deep-slate);
}

.page-about .about-source-tag {
  margin: 0 0 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal-cyan);
}

.page-about .about-source-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--about-soft-text);
}

.page-about .about-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin: 1.75rem 0;
  padding: clamp(1.2rem, 3vw, 1.85rem);
  border-left: 3px solid var(--ember-orange);
  background-image: linear-gradient(120deg, rgba(255, 91, 54, 0.11), rgba(11, 32, 24, 0) 72%);
}

.page-about .about-callout-num {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ember-orange);
}

.page-about .about-callout .about-p {
  margin-bottom: 0;
}

/* ---------- 表格 ---------- */

.page-about .about-table-wrap {
  margin: 1.75rem 0;
  overflow-x: auto;
}

.page-about .about-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.page-about .about-table caption {
  padding-bottom: 0.75rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 0.7rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.page-about .about-table thead th {
  background-color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist-cyan);
  border-bottom-color: var(--line-strong);
}

.page-about .about-table tbody tr:nth-child(even) {
  background-color: rgba(22, 48, 42, 0.42);
}

.page-about .about-table tbody td:first-child {
  color: var(--bone-white);
  font-weight: 600;
}

.page-about .about-table tbody td {
  color: var(--about-soft-text);
  line-height: 1.6;
}

/* ---------- 本地小组色带 ---------- */

.page-about .about-band {
  margin-top: 1.6rem;
  padding: clamp(1.15rem, 3vw, 1.7rem) clamp(1.15rem, 3vw, 1.9rem);
  border-left: 3px solid var(--signal-cyan);
  background-image: linear-gradient(120deg, rgba(47, 230, 200, 0.1), rgba(11, 32, 24, 0) 74%);
}

.page-about .about-band-text {
  margin: 0;
  max-width: 38em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--about-soft-text);
}

/* ---------- 规模数字 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 1.6rem 0 0;
  background-color: var(--line);
}

.page-about .about-metric {
  padding: 1.25rem 1.15rem 1.35rem;
  background-color: var(--deep-slate);
}

.page-about .about-metric-num {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--signal-cyan);
}

.page-about .about-metric-label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-scenes {
  display: grid;
  gap: 0.85rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scenes li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 1rem;
  line-height: 1.72;
  color: var(--about-soft-text);
}

.page-about .about-scenes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.6rem;
  height: 2px;
  background-color: var(--signal-cyan);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  display: grid;
  gap: 1.1rem;
  margin-top: 2.25rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-cta-text {
  margin: 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(242, 239, 230, 0.8);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 720px) {
  .page-about .about-callout {
    grid-template-columns: 5rem minmax(0, 1fr);
    align-items: start;
    gap: 1.4rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gutter);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-offset) + 1.25rem);
  }

  .page-about .about-rail-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail-list li + li {
    margin-top: 0.15rem;
  }

  .page-about .about-rail-link {
    display: flex;
    gap: 0.7rem;
    width: 100%;
    padding: 0.5rem 0 0.5rem 0.8rem;
    border: 0;
    border-left: 2px solid transparent;
    background-color: transparent;
    white-space: normal;
    font-size: 0.875rem;
    line-height: 1.5;
    transition: color 200ms ease, border-color 200ms ease;
  }

  .page-about .about-rail-link[aria-current="true"] {
    border-left-color: var(--signal-cyan);
    color: var(--bone-white);
  }

  .page-about .about-rail-link[aria-current="true"] .about-rail-num {
    color: var(--signal-cyan);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-copy {
    padding-right: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-link {
    transition: none;
  }

  .page-about .about-hero::after {
    transform: none;
  }
}
<<<END>>>