.page-about {
  --about-gutter: 20px;
  --about-section-y: 56px;
  display: block;
  background: var(--ink);
  color: var(--fog);
  overflow-x: hidden;
}

.page-about .about-shell {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
}

/* 面包屑 */
.page-about .about-crumbbar {
  padding: 16px var(--about-gutter) 0;
}
.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--haze);
}
.page-about .crumbs a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .crumbs a:hover {
  text-decoration: underline;
}
.page-about .crumbs__sep {
  color: var(--sand-2);
}

/* 通用小标签 */
.page-about .about-chip {
  display: inline-block;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  background: var(--wine);
  color: var(--fog);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.6;
}
.page-about .about-chip--amber {
  background: var(--amber);
  color: var(--ink);
  font-weight: 700;
}

/* 首屏 */
.page-about .about-hero {
  padding: 24px var(--about-gutter) 48px;
  background: linear-gradient(155deg, var(--ink) 0%, var(--ink-2) 58%, var(--sand) 138%);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}
.page-about .about-hero__grid {
  display: grid;
  gap: 22px;
}
.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--haze);
  text-transform: uppercase;
}
.page-about .about-hero__rail-line {
  flex: none;
  width: 26px;
  height: 1px;
  background: var(--sand-2);
}
.page-about .about-hero__rail-text {
  white-space: nowrap;
}
.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 7.2vw, 56px);
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: var(--fog);
}
.page-about .about-hero__lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--bone);
}
.page-about .about-hero__stats {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}
.page-about .about-stat {
  padding-left: 12px;
  border-left: 1px solid var(--sand-2);
  display: grid;
  gap: 4px;
}
.page-about .about-stat__num {
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.02em;
}
.page-about .about-stat__unit {
  margin-left: 4px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--haze);
  letter-spacing: 0.04em;
}
.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--bone);
}

/* 章节标记 */
.page-about .about-sec {
  padding: var(--about-section-y) var(--about-gutter);
}
.page-about .section-mark {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 12px;
  align-items: baseline;
  margin-bottom: 26px;
}
.page-about .section-mark__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}
.page-about .section-mark__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 5.4vw, 40px);
  line-height: 1.18;
  color: var(--fog);
}
.page-about .section-mark__note {
  grid-column: 1 / -1;
  padding-left: 10px;
  border-left: 1px solid var(--sand-2);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--haze);
}

/* 图片容器 */
.page-about .frame-figure {
  margin: 0;
}
.page-about .frame-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  filter: brightness(0.82) saturate(0.88);
}
.page-about .frame-figure__caption {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--haze);
}

/* 沿革时间轴 */
.page-about .about-era {
  background: var(--ink);
}
.page-about .about-era__grid {
  display: grid;
  gap: 30px;
}
.page-about .era-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .era-item {
  position: relative;
  padding: 0 0 26px 24px;
  border-left: 1px solid rgba(110, 90, 63, 0.55);
}
.page-about .era-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}
.page-about .era-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(227, 167, 47, 0.14);
}
.page-about .era-item__year {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--amber);
}
.page-about .era-item__card {
  margin-top: 10px;
  padding: 16px 18px;
  border: 1px solid rgba(110, 90, 63, 0.42);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(35, 56, 77, 0.92), rgba(11, 30, 45, 0.94));
}
.page-about .era-item__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--fog);
}
.page-about .era-item__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bone);
}
.page-about .about-era__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}
.page-about .about-era__aside-note {
  margin: 0;
  padding-left: 14px;
  border-left: 1px solid var(--sand-2);
  font-size: 13px;
  line-height: 1.85;
  color: var(--haze);
}

/* 空间分区标签页 */
.page-about .about-space {
  background: var(--sand);
}
.page-about .space-tabs {
  position: relative;
  margin-bottom: 28px;
}
.page-about .space-tabs__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.page-about .space-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}
.page-about .space-tabs__label {
  cursor: pointer;
  padding: 9px 18px;
  border: 1px solid rgba(233, 220, 198, 0.34);
  border-radius: var(--radius-pill);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--bone);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.page-about .space-tabs__label:hover {
  border-color: var(--amber);
  color: var(--fog);
}
.page-about #space-tab-1:checked ~ .space-tabs__bar [for="space-tab-1"],
.page-about #space-tab-2:checked ~ .space-tabs__bar [for="space-tab-2"],
.page-about #space-tab-3:checked ~ .space-tabs__bar [for="space-tab-3"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
  font-weight: 700;
}
.page-about #space-tab-1:focus-visible ~ .space-tabs__bar [for="space-tab-1"],
.page-about #space-tab-2:focus-visible ~ .space-tabs__bar [for="space-tab-2"],
.page-about #space-tab-3:focus-visible ~ .space-tabs__bar [for="space-tab-3"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-about .space-tabs__panel {
  display: none;
}
.page-about #space-tab-1:checked ~ .space-tabs__panel--1,
.page-about #space-tab-2:checked ~ .space-tabs__panel--2,
.page-about #space-tab-3:checked ~ .space-tabs__panel--3 {
  display: block;
  animation: about-panel-in 0.2s ease-out;
}
@keyframes about-panel-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.page-about .space-tabs__panel-inner {
  padding: 22px 20px;
  border: 1px solid rgba(227, 167, 47, 0.22);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--ink) 0%, var(--ink-2) 100%);
}
.page-about .space-tabs__panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--fog);
}
.page-about .space-tabs__panel p {
  margin: 0 0 12px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--bone);
}
.page-about .space-tabs__panel p:last-child {
  margin-bottom: 0;
}
.page-about .space-tabs__facts {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-about .space-tabs__facts li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--bone);
}
.page-about .space-tabs__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}
.page-about .about-space__figure {
  margin-top: 28px;
}

/* 服务网络 */
.page-about .about-network {
  background: var(--ink);
}
.page-about .about-network__grid {
  display: grid;
  gap: 28px;
}
.page-about .coverage-map {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
}
.page-about .about-network__legend {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 13px;
  line-height: 1.85;
  color: var(--haze);
}
.page-about .about-network__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-network__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(110, 90, 63, 0.4);
}
.page-about .about-network__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-network__num {
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}
.page-about .about-network__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--bone);
}

/* 团队（浅色阅读区） */
.page-about .about-team {
  background: var(--bone);
  color: var(--ink);
}
.page-about .about-team .section-mark__num {
  color: var(--wine);
}
.page-about .about-team .section-mark__title {
  color: var(--ink);
}
.page-about .about-team .section-mark__note {
  color: var(--sand);
  border-left-color: var(--sand-2);
}
.page-about .about-team__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .team-stat {
  padding: 20px 18px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--amber);
  background: var(--ink);
  color: var(--fog);
}
.page-about .team-stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.02em;
}
.page-about .team-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--haze);
}
.page-about .team-stat p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--bone);
}
.page-about .about-team__body {
  margin-top: 24px;
}
.page-about .about-team__body p {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-2);
}
.page-about .about-team__body p:last-child {
  margin-bottom: 0;
}
.page-about .about-team__body .rule-text {
  padding-left: 16px;
  border-left: 1px solid var(--sand-2);
  font-weight: 300;
  color: var(--ink);
}

/* 资质与合作 */
.page-about .about-honor {
  background: var(--ink-2);
}
.page-about .about-honor__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .about-card {
  padding: 18px;
  border: 1px solid rgba(233, 220, 198, 0.18);
  border-radius: var(--radius-md);
  background: rgba(233, 220, 198, 0.06);
}
.page-about .about-card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.3;
  color: var(--fog);
}
.page-about .about-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--bone);
}
.page-about .about-honor__figure {
  margin-top: 26px;
}

/* 到访与联络 */
.page-about .about-cta {
  padding: var(--about-section-y) var(--about-gutter) 64px;
  background: var(--ink);
}
.page-about .about-cta__board {
  position: relative;
  overflow: hidden;
  padding: 26px 22px;
  border: 1px solid rgba(227, 167, 47, 0.32);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(63, 46, 34, 0.96) 0%, rgba(11, 30, 45, 0.98) 72%);
}
.page-about .about-cta__board::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 208, 192, 0.16), transparent 70%);
  pointer-events: none;
}
.page-about .about-cta h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.2vw, 34px);
  line-height: 1.2;
  color: var(--fog);
}
.page-about .about-cta p {
  position: relative;
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--bone);
}
.page-about .hours {
  position: relative;
  margin-top: 22px;
  max-width: 420px;
}
.page-about .hours__ruler {
  position: relative;
  height: 10px;
  border-radius: var(--radius-pill);
  background: repeating-linear-gradient(90deg, rgba(233, 220, 198, 0.22) 0 1px, transparent 1px 14px), rgba(233, 220, 198, 0.14);
  overflow: hidden;
}
.page-about .hours__bar {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--amber), var(--cyan));
}
.page-about .hours__legend {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--haze);
}
.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}
.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.page-about .about-btn--primary {
  background: var(--amber);
  color: var(--ink);
  font-weight: 700;
}
.page-about .about-btn--primary:hover {
  background: #f0b63f;
}
.page-about .about-btn--ghost {
  border: 1px solid rgba(233, 220, 198, 0.45);
  color: var(--fog);
}
.page-about .about-btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.page-about a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-about .about-cta__more {
  position: relative;
  margin-top: 18px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--haze);
}
.page-about .about-cta__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 208, 192, 0.4);
}
.page-about .about-cta__more a:hover {
  border-bottom-color: var(--cyan);
}

/* 平板与桌面 */
@media (min-width: 760px) {
  .page-about {
    --about-section-y: 68px;
    --about-gutter: 32px;
  }
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .era-item:nth-child(even) {
    margin-left: 28px;
  }
  .page-about .about-team__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-honor__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .space-tabs__panel-inner {
    padding: 26px 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 30px;
    padding-bottom: 60px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
  .page-about .about-hero__rail {
    flex-direction: column;
    justify-content: flex-start;
    align-self: stretch;
    padding-top: 10px;
  }
  .page-about .about-hero__rail-line {
    width: 1px;
    height: 64px;
  }
  .page-about .about-hero__rail-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }
  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-about .about-era__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .about-era__aside {
    position: sticky;
    top: calc(var(--top-h) + 24px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-honor__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta__board {
    padding: 40px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .space-tabs__panel {
    animation: none !important;
  }
  .page-about .space-tabs__label,
  .page-about .about-btn {
    transition: none;
  }
}