.page-about {
  --about-line: #24453D;
  --about-line-strong: #35605A;
}

.page-about .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about summary:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 22px 0 6px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray);
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--about-line-strong);
}

.page-about .breadcrumb__list a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--dur) ease-out;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-masthead {
  padding: 12px 0 34px;
}

.page-about .about-masthead .eyebrow {
  margin: 0;
}

.page-about .about-masthead__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 7.6vw, 96px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 14px 0 30px;
  max-width: 13em;
}

.page-about .about-masthead__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-masthead__lede {
  margin: 0;
  font-size: 19px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 40ch;
}

.page-about .about-masthead__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
}

.page-about .about-masthead__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border-left: 2px solid var(--about-line-strong);
  font-size: 13px;
  line-height: 1.5;
  color: var(--gray);
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -0.02em;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 44px;
  border: 2px solid var(--about-line-strong);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .45);
  overflow: hidden;
  background: var(--night);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: clamp(200px, 30vw, 470px);
  object-fit: cover;
}

.page-about .about-figure--square img {
  height: clamp(220px, 26vw, 340px);
}

.page-about .about-figure--board img {
  height: clamp(200px, 24vw, 300px);
}

/* ---------- 主骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 72px;
}

/* ---------- 左栏：编辑原则 ---------- */
.page-about .about-rail {
  border-left: 2px solid var(--about-line-strong);
  padding-left: 20px;
}

.page-about .about-rail__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .about-rail__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
  margin: 0 0 20px;
  max-width: 30ch;
}

.page-about .principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .principle-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 13px 10px 13px 0;
  border-top: 2px solid var(--about-line);
  transition: background-color var(--dur) ease-out;
}

.page-about .principle-item:last-child {
  border-bottom: 2px solid var(--about-line);
}

.page-about .principle-item__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--gray);
  padding-top: 3px;
  transition: color var(--dur) ease-out;
}

.page-about .principle-item__body {
  display: grid;
  gap: 4px;
}

.page-about .principle-item__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .principle-item__hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray);
  transition: color var(--dur) ease-out;
}

.page-about .principle-item:hover,
.page-about .principle-item:focus-within {
  background-color: rgba(200, 240, 74, .09);
}

.page-about .principle-item:hover .principle-item__no,
.page-about .principle-item:hover .principle-item__hint {
  color: var(--lime);
}

/* ---------- 右侧正文流 ---------- */
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-section {
  padding: 0 0 48px;
  margin-bottom: 48px;
  border-bottom: 2px solid var(--about-line-strong);
}

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

.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 0 0 20px;
}

.page-about .section-head__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0;
  max-width: 22em;
}

.page-about .section-head__note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0;
}

/* ---------- 正文与引用块 ---------- */
.page-about .prose p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 40ch;
  margin: 0 0 16px;
}

.page-about .about-quote {
  margin: 24px 0;
  padding: 18px 22px;
  border-left: 8px solid var(--lime);
  background-color: rgba(243, 247, 244, .06);
  border-radius: var(--radius);
}

.page-about .about-quote p {
  margin: 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--paper);
  max-width: 44ch;
}

.page-about .stance-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .stance-list li {
  border-left: 2px solid var(--about-line-strong);
  padding: 2px 0 2px 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .stance-list strong {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 数据口径 ---------- */
.page-about .scope-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .table-scroll {
  overflow-x: auto;
  border: 2px solid var(--court);
  border-radius: var(--radius);
  background-color: var(--paper);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .45);
}

.page-about .scope-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
}

.page-about .scope-table th {
  background-color: var(--court);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-align: left;
  padding: 11px 14px;
  white-space: nowrap;
}

.page-about .scope-table td {
  padding: 13px 14px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--court);
  border-top: 2px solid var(--court);
  vertical-align: top;
}

.page-about .scope-table td:first-child {
  font-family: var(--font-mono);
  font-weight: 700;
  white-space: nowrap;
}

.page-about .scope-table tbody tr:hover td {
  background-color: rgba(200, 240, 74, .22);
}

.page-about .scope-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray);
  max-width: 48ch;
}

/* ---------- 编辑团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .card.team-card {
  background-color: var(--paper);
  color: var(--court);
  border: 2px solid var(--court);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .45);
  padding: 20px 20px 22px;
  transition: transform var(--dur) ease-out, box-shadow var(--dur) ease-out;
}

.page-about .card.team-card:hover,
.page-about .card.team-card:focus-within {
  transform: translateY(-2px);
  box-shadow: 8px 9px 0 rgba(0, 0, 0, .5);
}

.page-about .team-card .card__meta {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--orange-deep);
}

.page-about .team-card .card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--court);
}

.page-about .team-card .card__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--court);
}

.page-about .team-card__hand {
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 2px solid rgba(11, 43, 38, .25);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--orange-deep);
}

/* ---------- 核对与时间标注 ---------- */
.page-about .check-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 34px;
  position: relative;
}

.page-about .timeline__list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background-color: var(--about-line-strong);
}

.page-about .timeline__item {
  position: relative;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 28px;
  width: 12px;
  height: 2px;
  background-color: var(--gray);
  transition: width var(--dur) ease-out, background-color var(--dur) ease-out;
}

.page-about .timeline__item[data-active]::before {
  width: 32px;
  background-color: var(--lime);
}

.page-about .timeline__node {
  display: grid;
  gap: 5px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  border-top: 2px solid var(--about-line);
  padding: 13px 0;
  cursor: pointer;
  font: inherit;
  color: var(--paper);
  transition: background-color var(--dur) ease-out;
}

.page-about .timeline__item:first-child .timeline__node {
  border-top: 0;
  padding-top: 4px;
}

.page-about .timeline__node:hover {
  background-color: rgba(200, 240, 74, .07);
}

.page-about .timeline__time {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
  transition: color var(--dur) ease-out;
}

.page-about .timeline__item[data-active] .timeline__title {
  color: var(--lime);
}

.page-about .timeline__readout {
  margin: 22px 0 0;
  padding: 15px 18px;
  border: 2px solid var(--about-line-strong);
  box-shadow: inset 6px 0 0 var(--lime);
  border-radius: var(--radius);
  background-color: rgba(243, 247, 244, .06);
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
}

/* ---------- 栏目演进 ---------- */
.page-about .evo-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .evo-item {
  border-top: 2px solid var(--about-line);
}

.page-about .evo-item:last-child {
  border-bottom: 2px solid var(--about-line);
}

.page-about .fold__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
  transition: color var(--dur) ease-out;
}

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

.page-about .fold__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--lime);
}

.page-about .fold[open] .fold__head::after {
  content: "\2212";
}

.page-about .fold__head:hover {
  color: var(--lime);
}

.page-about .evo-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--court);
  background-color: var(--lime);
  padding: 2px 8px;
  border-radius: var(--radius);
}

.page-about .fold__body {
  padding: 0 0 20px;
  max-width: 52ch;
}

.page-about .fold__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 本地运营与规范 ---------- */
.page-about .op-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .op-text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 38ch;
}

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

.page-about .op-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .op-list li {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-top: 2px solid var(--about-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .op-list li:last-child {
  border-bottom: 2px solid var(--about-line);
}

.page-about .op-list .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gray);
  padding-top: 5px;
}

.page-about .op-links {
  margin: 30px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .op-links a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 2px solid rgba(200, 240, 74, .4);
  transition: border-color var(--dur) ease-out;
}

.page-about .op-links a:hover {
  border-bottom-color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .stance-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .scope-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 30px;
  }

  .page-about .check-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 34px;
  }

  .page-about .op-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 34px;
  }
}

@media (min-width: 900px) {
  .page-about .about-masthead__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 46px;
  }

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

  .page-about .team-card:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: 60px;
  }
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: minmax(210px, 3fr) minmax(0, 9fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 116px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}