.page-about {
  --about-rail-w: 172px;
  --about-cut: 14px;
  background-color: var(--pitch);
  color: var(--lamp);
  overflow-x: hidden;
}

.page-about .about-crumb-wrap {
  padding-top: 20px;
  padding-bottom: 6px;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb-item {
  font-family: var(--font-narrow);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grid-line);
}

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

.page-about .breadcrumb-item a {
  color: var(--grid-line);
  text-decoration: none;
}

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

.page-about .breadcrumb-current {
  color: var(--lamp);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-top: 26px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 30px;
}

.page-about .about-scale-tick {
  display: flex;
  align-items: flex-end;
  height: 20px;
  border-right: 1px solid var(--line-soft);
}

.page-about .about-scale-tick:last-child {
  border-right: 0;
}

.page-about .about-scale-tick::after {
  content: "";
  width: 10px;
  height: 3px;
  background-color: var(--line-strong);
  transition: background-color 300ms ease, box-shadow 300ms ease;
}

.page-about .about-scale-tick.is-lit::after {
  background-color: var(--cyan);
  box-shadow: 0 0 10px rgba(35, 211, 211, 0.55);
}

.page-about .about-hero-inner {
  padding-bottom: 44px;
}

.page-about .about-kicker {
  color: var(--orange);
  margin: 0;
}

.page-about .about-title {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(34px, 7.4vw, 76px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--lamp);
  max-width: 15em;
}

.page-about .about-lead {
  margin: 22px 0 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 246, 244, 0.82);
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  padding: 1px;
  background-color: var(--line);
  list-style: none;
}

.page-about .about-meta-cell {
  background-color: var(--pitch);
  padding: 16px 16px 18px;
}

.page-about .about-meta-num {
  display: block;
  font-size: 28px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-meta-label {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 246, 244, 0.66);
}

/* ---------- 章节通用 ---------- */

.page-about .about-section {
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-section-head {
  max-width: 46em;
}

.page-about .about-section-head--tight {
  max-width: 40em;
}

.page-about .about-section-head .section-title {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--lamp);
}

.page-about .about-section-head .section-label {
  margin: 0;
  color: var(--yellow);
}

.page-about .about-section-head .section-note {
  margin: 16px 0 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 246, 244, 0.72);
}

/* ---------- 配图 ---------- */

.page-about .about-figure {
  margin: 34px 0 0;
}

.page-about .about-figure img,
.page-about .about-check-figure img {
  border-radius: 0;
}

/* ---------- 时间轴 ---------- */

.page-about .about-trace-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 44px;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .about-rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -1px;
  padding: 10px 0 10px 16px;
  border-left: 2px solid transparent;
  font-family: var(--font-narrow);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--grid-line);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about .about-rail-link .mono {
  font-size: 11px;
  color: var(--line-strong);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--lamp);
  border-left-color: var(--cyan);
}

.page-about .about-rail-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

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

.page-about .about-trace-item {
  position: relative;
  padding: 4px 0 38px 28px;
  border-left: 1px solid var(--line);
  scroll-margin-top: 130px;
}

.page-about .about-trace-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-trace-dot {
  position: absolute;
  left: -5px;
  top: 12px;
  width: 9px;
  height: 9px;
  background-color: var(--pitch);
  border: 1px solid var(--grid-line);
  transform: rotate(45deg);
  transition: background-color 260ms ease, border-color 260ms ease;
}

.page-about .about-trace-dot.is-lit {
  background-color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-trace-range {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-trace-title {
  margin: 8px 0 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.35;
  color: var(--lamp);
}

.page-about .about-trace-item p {
  margin: 0;
  max-width: 38em;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 246, 244, 0.78);
}

.page-about .about-trace-more {
  margin-top: 12px !important;
  font-size: 14px !important;
  color: rgba(242, 246, 244, 0.6) !important;
}

.page-about .about-trace-more a,
.page-about .about-rule-body a,
.page-about .about-check-more a,
.page-about .about-region-text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 211, 211, 0.45);
}

.page-about .about-trace-more a:hover,
.page-about .about-rule-body a:hover,
.page-about .about-check-more a:hover,
.page-about .about-region-text a:hover,
.page-about .about-trace-more a:focus-visible,
.page-about .about-rule-body a:focus-visible,
.page-about .about-check-more a:focus-visible,
.page-about .about-region-text a:focus-visible {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}

/* ---------- 注释带 ---------- */

.page-about .about-note {
  position: relative;
  margin-top: 44px;
  padding: 22px 22px 22px 26px;
  background-color: var(--paper);
  color: var(--night);
  border-left: 3px solid var(--orange);
}

.page-about .about-note .note-label {
  margin: 0;
  font-family: var(--font-narrow);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8a4a1c;
}

.page-about .about-note .note-text {
  margin: 10px 0 0;
  max-width: 40em;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.8;
  color: #24302b;
}

.page-about .about-details {
  margin-top: 16px;
}

.page-about .about-details summary {
  display: inline-block;
  padding-bottom: 2px;
  font-family: var(--font-narrow);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--night);
  border-bottom: 1px solid rgba(8, 17, 15, 0.4);
  cursor: pointer;
}

.page-about .about-details summary:focus-visible {
  outline: 2px solid var(--deep);
  outline-offset: 3px;
}

.page-about .about-details-list {
  margin: 14px 0 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px solid var(--paper-line);
  display: grid;
  gap: 10px;
}

.page-about .about-details-list li {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.75;
  color: #24302b;
}

.page-about .about-details-list .mono {
  display: inline-block;
  min-width: 8.5em;
  margin-right: 10px;
  font-size: 13px;
  color: #8a4a1c;
}

/* ---------- 登记原则 ---------- */

.page-about .about-rules {
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rule {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 0 18px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rule:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-rule-num {
  font-size: 18px;
  line-height: 1.4;
  color: var(--orange);
}

.page-about .about-rule-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.4;
  color: var(--lamp);
}

.page-about .about-rule-body p {
  margin: 0;
  max-width: 40em;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 246, 244, 0.76);
}

/* ---------- 校核机制 ---------- */

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

.page-about .about-check-text .section-title {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--lamp);
}

.page-about .about-check-text .section-label {
  margin: 0;
  color: var(--yellow);
}

.page-about .about-check-lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 246, 244, 0.78);
}

.page-about .about-check-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-check-list li {
  padding: 18px 0 18px 18px;
  border-left: 2px solid var(--deep);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-check-list li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-check-list h3 {
  margin: 0 0 8px;
  font-family: var(--font-narrow);
  font-size: 15px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-check-list p {
  margin: 0;
  max-width: 38em;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 246, 244, 0.74);
}

.page-about .about-check-more {
  margin: 22px 0 0;
  max-width: 34em;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 246, 244, 0.6);
}

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

/* ---------- 团队 ---------- */

.page-about .about-team-panel {
  background-color: var(--deep);
  padding: 30px 22px 34px;
  clip-path: polygon(
    var(--about-cut) 0,
    100% 0,
    100% calc(100% - var(--about-cut)),
    calc(100% - var(--about-cut)) 100%,
    0 100%,
    0 var(--about-cut)
  );
}

.page-about .about-team {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 24px;
}

.page-about .about-team-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 9px;
}

.page-about .about-team-name {
  font-family: var(--font-narrow);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lamp);
}

.page-about .about-team-num {
  font-size: 14px;
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team-bar {
  position: relative;
  height: 6px;
  background-color: rgba(154, 168, 162, 0.22);
  overflow: hidden;
}

.page-about .about-team-fill {
  display: block;
  height: 100%;
  background-color: var(--cyan);
  transition: filter 200ms ease;
}

.page-about .about-team-row:nth-child(1) .about-team-fill {
  width: 42.3%;
  background-color: var(--cyan);
}

.page-about .about-team-row:nth-child(2) .about-team-fill {
  width: 19.2%;
  background-color: var(--orange);
}

.page-about .about-team-row:nth-child(3) .about-team-fill {
  width: 26.9%;
  background-color: var(--yellow);
}

.page-about .about-team-row:nth-child(4) .about-team-fill {
  width: 11.5%;
  background-color: var(--grid-line);
}

.page-about .about-team-row:hover .about-team-fill {
  filter: brightness(1.25);
}

.page-about .about-team-desc {
  margin: 10px 0 0;
  max-width: 38em;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 246, 244, 0.68);
}

/* ---------- 地区与备案 ---------- */

.page-about .about-region {
  padding: 48px 0;
  background-color: var(--paper);
  color: var(--night);
  border-bottom: 1px solid var(--paper-line);
}

.page-about .about-region-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-region-label {
  margin: 0;
  color: #8a4a1c;
}

.page-about .about-region-title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--night);
}

.page-about .about-region-text p {
  margin: 16px 0 0;
  max-width: 36em;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  color: #24302b;
}

.page-about .about-region-text a {
  color: #0f5a63;
  border-bottom-color: rgba(15, 90, 99, 0.4);
}

.page-about .about-region-text a:hover,
.page-about .about-region-text a:focus-visible {
  color: #8a4a1c;
  border-bottom-color: #8a4a1c;
}

.page-about .about-region-facts {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--paper-line);
  border: 1px solid var(--paper-line);
}

.page-about .about-region-facts > div {
  background-color: var(--paper);
  padding: 14px 16px;
}

.page-about .about-region-facts dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--violet);
}

.page-about .about-region-facts dd {
  margin: 8px 0 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--night);
}

/* ---------- 编辑部自述 ---------- */

.page-about .about-editorial {
  position: relative;
  padding: 56px 0 60px;
  background-color: var(--night);
  overflow: hidden;
}

.page-about .about-editorial-bg {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  pointer-events: none;
}

.page-about .about-editorial-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-editorial-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-editorial-label {
  margin: 0;
  color: var(--orange);
}

.page-about .about-editorial-title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(26px, 5vw, 42px);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--lamp);
}

.page-about .about-editorial-body {
  margin-top: 22px;
}

.page-about .about-editorial-body p {
  margin: 0 0 16px;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 246, 244, 0.8);
}

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

.page-about .about-editorial-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin: 32px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-editorial-links a {
  display: inline-block;
  padding: 9px 16px;
  font-family: var(--font-narrow);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lamp);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  background-color: transparent;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-editorial-links a:hover,
.page-about .about-editorial-links a:focus-visible {
  color: var(--night);
  background-color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-editorial-links a:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-meta-cell {
    padding: 18px 18px 20px;
  }

  .page-about .about-team-panel {
    padding: 40px 34px 44px;
  }

  .page-about .about-note {
    padding: 26px 30px 26px 32px;
  }

  .page-about .about-region-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-hero-inner {
    padding-bottom: 58px;
  }

  .page-about .about-section {
    padding: 72px 0;
  }

  .page-about .about-trace-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 54px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 116px;
    align-self: start;
  }

  .page-about .about-check-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.68fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .about-region {
    padding: 76px 0;
  }

  .page-about .about-region-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-editorial {
    padding: 82px 0 88px;
  }

  .page-about .about-editorial-body {
    margin-top: 26px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-rule {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 0 26px;
    padding: 30px 0;
  }

  .page-about .about-rule-num {
    font-size: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-scale-tick::after,
  .page-about .about-trace-dot,
  .page-about .about-team-fill,
  .page-about .about-rail-link,
  .page-about .about-editorial-links a {
    transition: none;
  }
}