.page-about {
  --about-index-w: 236px;
  --about-gap: 56px;
  --about-card: #FFFCF4;
  --about-text: #32343a;
  --about-text-dim: #4a463d;
  --about-meta: #7b7261;
  background: var(--paper);
  color: var(--black);
  font-family: var(--f-sans);
  padding-bottom: 88px;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  font-size: 13px;
  color: var(--about-meta);
}
.page-about .breadcrumb a {
  color: var(--about-meta);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .breadcrumb a:hover {
  color: var(--ink);
  border-bottom-color: var(--amber);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}
.page-about .breadcrumb__sep {
  color: var(--paper-2);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 38px 0 0;
}
.page-about .about-hero__eyebrow {
  margin: 0 0 20px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: #9a8f7c;
}
.page-about .about-hero h1 {
  margin: 0 0 24px;
  max-width: 14em;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(34px, 6.4vw, 72px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.page-about .about-hero__lead {
  margin: 0 0 30px;
  max-width: 40em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--about-text);
}

.page-about .hero-stats {
  list-style: none;
  margin: 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--paper-2);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 18px;
}
.page-about .hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .hero-stats .stat-num {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.page-about .hero-stats .stat-lbl {
  font-size: 12.5px;
  color: var(--about-meta);
}

/* ---------- 整体栅格 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 52px;
}

/* ---------- 档案索引 ---------- */
.page-about .about-index__label {
  margin: 0 0 12px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: #9a8f7c;
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}
.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
  padding: 9px 15px;
  border: 1px solid var(--paper-2);
  border-radius: var(--pill);
  background: var(--about-card);
  color: var(--about-text-dim);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-about .about-index__link:hover {
  border-color: var(--amber);
  color: var(--ink);
  background: rgba(255, 138, 31, .1);
}
.page-about .about-index__num {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--amber);
}

/* ---------- 长文区 ---------- */
.page-about .about-doc {
  min-width: 0;
}
.page-about .doc-section {
  padding-top: 34px;
  margin-top: 52px;
  border-top: 1px solid var(--paper-2);
  scroll-margin-top: 88px;
}
.page-about .doc-section:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}
.page-about .doc-section__kicker {
  margin: 0 0 6px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--amber);
}
.page-about .doc-section__title {
  margin: 0 0 4px;
  font-family: var(--f-sans);
  font-weight: 900;
  font-size: clamp(23px, 3.4vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.012em;
  color: var(--ink);
}
.page-about .doc-section__title::before {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  margin-bottom: 18px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--amber), var(--amber-soft));
}
.page-about .doc-section p {
  max-width: 42em;
  margin: 16px 0 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--about-text);
}
.page-about .link-inline {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
  transition: background var(--dur) var(--ease);
}
.page-about .link-inline:hover {
  background: rgba(255, 138, 31, .18);
}

/* ---------- 读者分类 ---------- */
.page-about .audience-list,
.page-about .rule-list,
.page-about .shift-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}
.page-about .audience-list {
  display: grid;
  gap: 14px;
  max-width: 42em;
}
.page-about .audience-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--r-lg);
  background: var(--about-card);
  border: 1px solid var(--paper-2);
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-text-dim);
}
.page-about .audience-list b {
  display: block;
  color: var(--ink);
  font-weight: 700;
}
.page-about .audience-list__n {
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: var(--ink);
  border-radius: var(--pill);
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 30px 0 0;
  max-width: 100%;
}
.page-about .figure__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--paper-2);
}
.page-about .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .figure--tall {
  max-width: 420px;
}
.page-about .figure--tall .figure__media--tall img {
  max-height: 540px;
}
.page-about .figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-meta);
  max-width: 38em;
}

/* ---------- 旧版档案卡片 ---------- */
.page-about .archive-deck {
  margin-top: 28px;
  display: grid;
  gap: 14px;
  padding-bottom: 10px;
}
.page-about .archive-card {
  position: relative;
  z-index: 1;
  border-radius: var(--r-lg);
  background: var(--about-card);
  border: 1px solid var(--paper-2);
  overflow: hidden;
  box-shadow: 0 2px 0 var(--paper-2), 0 4px 0 #F2EAD9, 0 16px 32px rgba(11, 31, 51, .08);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .archive-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32px;
  height: 32px;
  border-radius: 0 var(--r-lg) 0 0;
  background: linear-gradient(225deg, var(--pink) 0 50%, transparent 50%);
  opacity: .9;
  pointer-events: none;
}
.page-about .archive-card:hover {
  border-color: var(--amber-soft);
}
.page-about .archive-card[open] {
  box-shadow: 0 2px 0 var(--paper-2), 0 22px 44px rgba(11, 31, 51, .14);
}
.page-about .archive-card__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 18px 52px 18px 20px;
  cursor: pointer;
  list-style: none;
}
.page-about .archive-card__head::-webkit-details-marker {
  display: none;
}
.page-about .archive-card__ver {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--ink);
  background: var(--paper-2);
  border-radius: var(--pill);
  padding: 5px 11px;
  transition: background var(--dur) var(--ease);
}
.page-about .archive-card__head:hover .archive-card__ver {
  background: var(--amber-soft);
}
.page-about .archive-card__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}
.page-about .archive-card__body {
  margin: 0 20px;
  padding: 14px 0 20px;
  border-top: 1px dashed var(--paper-2);
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-text-dim);
}

/* ---------- 整理标准 ---------- */
.page-about .rule-list {
  display: grid;
  gap: 0;
  max-width: 44em;
  border-top: 1px solid var(--paper-2);
}
.page-about .rule-list li {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--paper-2);
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-text-dim);
}
.page-about .rule-list__k {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--amber);
  padding-top: 4px;
}

/* ---------- 深色值班卡 ---------- */
.page-about .ink-card {
  position: relative;
  overflow: hidden;
  margin-top: 26px;
  padding: 28px 22px;
  border-radius: var(--r-xl);
  background: var(--ink);
  color: var(--on-ink);
  box-shadow: var(--shadow-1);
}
.page-about .ink-card::before {
  content: "";
  position: absolute;
  top: -45%;
  right: -18%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 138, 31, .3), transparent 68%);
  pointer-events: none;
}
.page-about .ink-card__meta {
  position: relative;
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber-soft);
}
.page-about .shift-list {
  position: relative;
  margin: 0;
  display: grid;
  gap: 14px;
}
.page-about .shift-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 13px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-ink);
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-ink-dim);
}
.page-about .shift-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .shift-list b {
  display: block;
  margin-bottom: 3px;
  color: var(--on-ink);
  font-weight: 700;
}
.page-about .shift-list__n {
  font-size: 12px;
  color: var(--amber);
  padding-top: 3px;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin-top: 30px;
  padding-left: 38px;
}
.page-about .timeline__rail {
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 22px;
  height: calc(100% - 8px);
  pointer-events: none;
}
.page-about .tl-node {
  position: relative;
  margin-bottom: 14px;
  border-radius: var(--r-lg);
  background: var(--about-card);
  border: 1px solid var(--paper-2);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .tl-node:hover {
  border-color: var(--amber-soft);
  box-shadow: 0 12px 26px rgba(11, 31, 51, .09);
}
.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--amber);
  transform: translateX(-50%);
  z-index: 1;
  transition: background var(--dur) var(--ease);
}
.page-about .tl-node[open]::before {
  background: var(--amber);
}
.page-about .tl-node__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}
.page-about .tl-node__sum::-webkit-details-marker {
  display: none;
}
.page-about .tl-node__ver {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--amber-soft);
  border-radius: var(--pill);
  padding: 5px 12px;
  transition: background var(--dur) var(--ease);
}
.page-about .tl-node__sum:hover .tl-node__ver {
  background: var(--amber);
}
.page-about .tl-node__label {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}
.page-about .tl-node__flag {
  margin-left: auto;
  font-size: 11px;
  letter-spacing: .09em;
  color: #8a7a60;
}
.page-about .tl-node__body {
  margin: 0 18px;
  padding: 12px 0 18px;
  border-top: 1px dashed var(--paper-2);
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--about-text-dim);
}

/* ---------- 备案与联系 ---------- */
.page-about .filing-block {
  margin-top: 24px;
  padding: 22px 20px;
  border-radius: var(--r-lg);
  background: var(--about-card);
  border: 1px solid var(--paper-2);
  border-left: 4px solid var(--amber);
}
.page-about .filing-block--contact {
  border-left-color: var(--jade);
}
.page-about .kv {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .kv li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--paper-2);
  font-size: 15px;
  line-height: 1.7;
}
.page-about .kv li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .kv__k {
  font-size: 12px;
  letter-spacing: .1em;
  color: #8a7a60;
}
.page-about .kv__v {
  color: var(--ink);
  word-break: break-word;
}
.page-about .kv__v.mono {
  font-family: var(--f-mono);
  font-size: 14.5px;
}

.page-about .doc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.page-about .link-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--pill);
  border: 1px solid var(--paper-2);
  background: var(--about-card);
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .link-chip::after {
  content: "→";
  font-family: var(--f-mono);
  color: var(--amber);
}
.page-about .link-chip:hover {
  border-color: var(--amber);
  background: rgba(255, 138, 31, .1);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px 24px;
  }
  .page-about .kv li {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
  .page-about .filing-block {
    padding: 26px 26px;
  }
  .page-about .ink-card {
    padding: 32px 30px;
  }
  .page-about .doc-section p {
    font-size: 17px;
  }
}

/* ---------- 桌面：固定档案索引 ---------- */
@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: 36px;
    align-self: start;
  }
  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-index__link {
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: var(--r-sm);
    background: transparent;
    padding: 11px 12px;
    font-size: 14px;
  }
  .page-about .about-index__link:hover {
    background: rgba(255, 138, 31, .1);
    border-left-color: var(--amber);
  }
  .page-about .about-doc {
    max-width: 760px;
  }
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 559px) {
  .page-about .timeline {
    padding-left: 30px;
  }
  .page-about .timeline__rail {
    width: 18px;
  }
  .page-about .tl-node::before {
    left: -21px;
  }
  .page-about .rule-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
  .page-about .rule-list__k {
    padding-top: 0;
  }
  .page-about .figure--tall {
    max-width: 100%;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .archive-card,
  .page-about .archive-card__ver,
  .page-about .tl-node,
  .page-about .tl-node__ver,
  .page-about .tl-node::before,
  .page-about .link-chip,
  .page-about .link-inline,
  .page-about .breadcrumb a {
    transition: none;
  }
}