/* ===== 关于本站 · 页面专属样式 ===== */

.page-about {
  display: block;
}

/* --- 面包屑 --- */
.page-about .about-crumb {
  padding-top: var(--space-4);
  color: var(--color-ink-muted);
}

/* --- 首屏 --- */
.page-about .about-hero {
  padding: var(--space-6) 0 var(--space-8);
  border-bottom: var(--border-thin) dashed var(--color-line);
  background:
    radial-gradient(120% 90% at 100% 0%, var(--color-primary-soft) 0%, transparent 62%),
    var(--color-surface);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--space-6);
  align-items: end;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
  max-width: 22ch;
}

.page-about .about-hero .lede {
  max-width: var(--measure);
  color: var(--color-ink);
  margin: 0;
}

/* 关键数字块 */
.page-about .about-figures {
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-3);
}

.page-about .about-figures__value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  margin: 0;
}

.page-about .about-figures__label {
  margin: var(--space-1) 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-about .about-figures__list {
  list-style: none;
  margin: 0;
  padding: var(--space-2) 0 0;
  border-top: var(--border-thin) dashed var(--color-line);
  display: grid;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-about .about-figures__list .num {
  color: var(--color-ink);
  margin-right: 4px;
}

/* --- 正文与侧栏目录 --- */
.page-about .about-body {
  display: grid;
  gap: var(--space-6);
  padding: var(--space-6) 0 var(--space-8);
}

.page-about .about-toc__title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) dashed var(--color-line);
}

.page-about .toc {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--space-2);
}

.page-about .toc__link {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  text-decoration: none;
  padding: 6px 0 6px var(--space-2);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: color 160ms ease-out, border-color 160ms ease-out, background-color 160ms ease-out;
}

.page-about .toc__link:hover {
  color: var(--color-ink);
  border-left-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-about .toc__link[aria-current="true"] {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-about .toc__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* --- 章节 --- */
.page-about .about-sec {
  padding: var(--space-6) 0;
  border-top: var(--border-thin) dashed var(--color-line);
}

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

.page-about .about-sec__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-primary);
  margin: 0 0 var(--space-2);
}

.page-about .about-sec h2 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-3);
  max-width: 24ch;
}

.page-about .about-sec p {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
}

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

/* 段首主色竖线 */
.page-about .about-mark {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-3);
}

/* --- 图文错位分栏 --- */
.page-about .about-split {
  display: grid;
  gap: var(--space-4);
  align-items: start;
  margin-top: var(--space-3);
}

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

/* --- 媒体容器 --- */
.page-about .media-frame {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

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

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

.page-about .about-figure .media-frame__caption {
  display: block;
  margin-top: var(--space-1);
  color: var(--color-ink-muted);
}

/* --- 三条收录边界 --- */
.page-about .about-bounds {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-about .about-bound {
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-line);
  transition: border-color 160ms ease-out, background-color 160ms ease-out;
}

.page-about .about-bound:hover,
.page-about .about-bound:focus-within {
  border-left-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-about .about-bound__key {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 4px;
}

.page-about .about-bound__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  max-width: var(--measure);
}

/* --- 浅色档案纸区：三种核验状态 --- */
.page-about .about-sec--paper {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-4);
  margin: var(--space-6) 0;
}

.page-about .about-sec--paper .about-sec__num {
  color: var(--color-contrast-accent);
}

.page-about .about-sec--paper h2,
.page-about .about-sec--paper p {
  color: var(--color-contrast-ink);
}

.page-about .about-sec--paper .media-frame {
  border-color: var(--color-contrast-line);
  background: var(--color-contrast-surface);
  box-shadow: none;
}

.page-about .about-sec--paper .media-frame__caption {
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface));
}

.page-about .about-states {
  display: grid;
  gap: var(--space-4);
  margin: var(--space-4) 0 var(--space-3);
}

.page-about .about-state {
  position: relative;
  padding: var(--space-3) 0 0 var(--space-3);
  border-top: 1px dashed var(--color-contrast-line);
  transition: background-color 160ms ease-out;
}

.page-about .about-state::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-3);
  bottom: 0;
  width: 2px;
  background: var(--color-contrast-line);
  transition: width 160ms ease-out, background-color 160ms ease-out;
}

.page-about .about-state:hover,
.page-about .about-state:focus-within {
  background: color-mix(in srgb, var(--color-primary) 9%, var(--color-contrast-surface));
}

.page-about .about-state:hover::before,
.page-about .about-state:focus-within::before {
  width: 4px;
}

.page-about .about-state[data-status="verified"]::before {
  background: var(--color-contrast-accent);
}

.page-about .about-state[data-status="pending"]::before {
  background: var(--color-primary);
}

.page-about .about-state[data-status="superseded"]::before {
  background: color-mix(in srgb, var(--color-contrast-ink) 52%, var(--color-contrast-surface));
}

.page-about .about-state__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-1);
}

.page-about .about-state__judge,
.page-about .about-state__act {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  margin: 0 0 6px;
  max-width: var(--measure);
}

.page-about .about-state__judge {
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, var(--color-contrast-surface));
  transition: color 160ms ease-out;
}

.page-about .about-state:hover .about-state__judge,
.page-about .about-state:focus-within .about-state__judge {
  color: var(--color-contrast-ink);
}

.page-about .about-state__act {
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
  margin-bottom: 0;
}

.page-about .about-state__key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
  margin-right: 6px;
}

/* --- 字段口径带 --- */
.page-about .about-fields {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: 0 0 var(--space-3);
  padding: var(--space-2) 0;
  border-top: var(--border-thin) dashed var(--color-line);
  border-bottom: var(--border-thin) dashed var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

.page-about .about-fields li::before {
  content: "▸";
  margin-right: 6px;
  color: var(--color-primary);
}

/* --- 小组分工（窄栏批注） --- */
.page-about .about-roles {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-about .about-role {
  display: grid;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  border-left: 2px solid var(--color-line);
  transition: border-color 160ms ease-out, background-color 160ms ease-out;
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-left-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-about .about-role__key {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
}

.page-about .about-role__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  max-width: var(--measure);
}

/* --- 正文链接 --- */
.page-about .about-articles a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px dashed color-mix(in srgb, var(--color-primary) 60%, transparent);
  transition: color 160ms ease-out, border-color 160ms ease-out;
}

.page-about .about-articles a:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink);
}

.page-about .about-articles a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- 勘误入口 --- */
.page-about .about-cta {
  display: inline-block;
  margin-top: var(--space-3);
  padding: 10px var(--space-3);
  border: var(--border-thin) solid var(--color-primary);
  border-bottom: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-decoration: none;
  transition: background-color 160ms ease-out, color 160ms ease-out;
}

.page-about .about-cta:hover {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-bottom-color: var(--color-primary);
}

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

/* --- 平板 --- */
@media (min-width: 720px) {
  .page-about .about-hero h1 {
    font-size: var(--text-2xl);
  }

  .page-about .about-bounds {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-about .about-states {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-about .about-role {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }

  .page-about .about-sec--paper {
    padding: var(--space-8) var(--space-6);
  }
}

/* --- 桌面 --- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: var(--space-8) 0 var(--section-y);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.9fr);
    gap: var(--space-8);
  }

  .page-about .about-sec h2 {
    font-size: var(--text-3xl);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: var(--space-8);
    padding: var(--space-8) 0 var(--section-y-lg);
  }

  .page-about .about-toc {
    position: sticky;
    top: 96px;
  }

  .page-about .toc {
    display: grid;
    gap: 2px;
  }

  .page-about .about-sec {
    padding: var(--space-8) 0;
  }
}

/* --- 减少动效 --- */
@media (prefers-reduced-motion: reduce) {
  .page-about .toc__link,
  .page-about .about-bound,
  .page-about .about-state,
  .page-about .about-state::before,
  .page-about .about-state__judge,
  .page-about .about-role,
  .page-about .about-articles a,
  .page-about .about-cta {
    transition-duration: 0ms;
  }
}
<<<END>>>