.page-about {
  --about-edge: clamp(1.1rem, 4vw, 3rem);
  --about-rule: rgba(139, 143, 138, .28);
  --paper: #FAF6EE;
  background: var(--bone);
  color: var(--ink);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  color: var(--bone);
  background-color: var(--ink);
  background-image:
    radial-gradient(circle at 82% 10%, rgba(201, 162, 74, .20), transparent 52%),
    radial-gradient(circle at 6% 92%, rgba(197, 58, 46, .18), transparent 48%);
  padding: calc(var(--header-h) + 2.25rem) var(--about-edge) 2.75rem;
  border-bottom: 2px solid var(--char);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(244, 239, 230, .14) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  color: var(--stone);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .04em;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1.5rem;
}

.page-about .about-hero .breadcrumb a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease, color .18s ease;
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  border-bottom-color: var(--gold);
}

.page-about .about-hero .eyebrow {
  margin: 0 0 1rem;
  color: var(--gold);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.2vw, 3.7rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  margin: 0 0 1rem;
  max-width: 20ch;
  color: var(--bone);
}

.page-about .about-hero .lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(.95rem, 2.4vw, 1.06rem);
  line-height: 1.8;
  color: rgba(244, 239, 230, .84);
}

.page-about .hero-facts {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px dashed var(--line-strong);
  display: grid;
  gap: .9rem;
}

.page-about .hero-facts li {
  display: flex;
  align-items: baseline;
  gap: .6rem;
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  color: var(--gold);
  line-height: 1;
}

.page-about .fact-label {
  font-size: .84rem;
  color: rgba(244, 239, 230, .72);
  line-height: 1.5;
}

/* ---------- 主体栅格 ---------- */

.page-about .about-deck {
  display: grid;
  gap: 2.25rem;
  padding-top: 2.5rem;
  padding-bottom: 4rem;
}

.page-about .about-main {
  min-width: 0;
}

.page-about .about-rail {
  display: grid;
  gap: 1rem;
  align-content: start;
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .about-chapter {
  padding-bottom: 2.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-chapter--end {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .chapter-head {
  display: flex;
  align-items: flex-start;
  gap: .85rem;
  margin-bottom: 1.1rem;
}

.page-about .chapter-num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -.02em;
  flex: none;
  padding-top: .12em;
}

.page-about .chapter-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.32rem, 4.4vw, 2rem);
  line-height: 1.25;
  margin: 0;
  color: var(--ink);
}

.page-about .about-chapter p {
  max-width: 66ch;
  margin: 0 0 1rem;
  font-size: .96rem;
  line-height: 1.8;
  color: #23303C;
}

.page-about .after-list {
  margin-top: 1.2rem !important;
  padding-left: .9rem;
  border-left: 3px solid var(--celadon);
  font-size: .9rem !important;
  color: #3A4750 !important;
}

/* ---------- 卡片 ---------- */

.page-about .two-up {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

.page-about .about-card {
  background: var(--paper);
  border: 2px solid var(--char);
  box-shadow: var(--shadow-soft);
  padding: 1.05rem 1.15rem 1.15rem;
  transition: transform .18s ease, box-shadow .18s ease;
}

.page-about .about-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 rgba(23, 26, 28, .6);
}

.page-about .card-tag {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--cinnabar);
  margin: 0 0 .5rem !important;
  line-height: 1 !important;
}

.page-about .about-card-title {
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  margin: 0 0 .5rem;
  color: var(--ink);
}

.page-about .about-card-text {
  margin: 0 !important;
  font-size: .88rem !important;
  line-height: 1.75 !important;
  color: #3A4750 !important;
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 1.6rem 0 0;
  border: 2px solid var(--char);
  box-shadow: var(--shadow-hard);
  background: var(--ink-2);
  overflow: hidden;
}

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

.page-about .about-figure .media-caption {
  display: block;
  padding: .65rem .85rem;
  background: var(--ink);
  color: rgba(244, 239, 230, .76);
  font-size: .78rem;
  line-height: 1.6;
  border-top: 2px solid var(--char);
}

/* ---------- 栏目清单 ---------- */

.page-about .column-list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: .1rem;
  border-top: 2px solid var(--char);
}

.page-about .column-list li {
  display: flex;
  gap: .9rem;
  padding: .95rem .2rem;
  border-bottom: 1px solid var(--about-rule);
  transition: background-color .18s ease;
}

.page-about .column-list li:hover {
  background: rgba(201, 162, 74, .10);
}

.page-about .col-num {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--stone);
  padding-top: .2rem;
  flex: none;
}

.page-about .col-name {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 .25rem;
  color: var(--ink);
}

.page-about .col-name a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  transition: color .18s ease, border-color .18s ease;
}

.page-about .col-name a:hover,
.page-about .col-name a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-about .col-text {
  margin: 0 !important;
  font-size: .87rem !important;
  line-height: 1.7 !important;
  color: #4A555F !important;
}

/* ---------- 家庭场景 ---------- */

.page-about .family-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.4rem;
}

.page-about .slot {
  padding: 0 0 1.1rem;
  margin-bottom: 1.1rem;
  border-bottom: 1px dashed var(--about-rule);
}

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

.page-about .slot-time {
  display: inline-block;
  margin: 0 0 .45rem !important;
  padding: .18rem .55rem;
  background: var(--ink);
  color: var(--gold);
  font-size: .72rem !important;
  letter-spacing: .1em;
  line-height: 1.4 !important;
}

.page-about .slot-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 .4rem;
  color: var(--ink);
}

.page-about .slot p:not(.slot-time) {
  margin: 0 !important;
  font-size: .89rem !important;
  line-height: 1.75 !important;
  color: #3A4750 !important;
}

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

/* ---------- 更新三类 ---------- */

.page-about .update-grid {
  display: grid;
  gap: .9rem;
  margin-top: 1.4rem;
}

.page-about .update-card {
  background: var(--ink-2);
  color: var(--bone);
  border: 2px solid var(--char);
  box-shadow: var(--shadow-soft);
  padding: 1rem 1.1rem 1.15rem;
  transition: background-color .18s ease, transform .18s ease;
}

.page-about .update-card:hover {
  background: #172F47;
  transform: translate(-2px, -2px);
}

.page-about .update-tag {
  margin: 0 0 .55rem !important;
  font-size: .7rem !important;
  letter-spacing: .14em;
  color: var(--gold);
  line-height: 1 !important;
}

.page-about .update-card h3 {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  margin: 0 0 .45rem;
  color: var(--bone);
}

.page-about .update-card p {
  margin: 0 !important;
  font-size: .85rem !important;
  line-height: 1.72 !important;
  color: rgba(244, 239, 230, .78) !important;
}

/* ---------- 团队 ---------- */

.page-about .team-list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: .8rem;
  counter-reset: team;
}

.page-about .team-list li {
  position: relative;
  background: var(--paper);
  border: 2px solid var(--char);
  border-left-width: 8px;
  border-left-color: var(--moss);
  padding: .95rem 1rem;
}

.page-about .team-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 .35rem;
  color: var(--ink);
}

.page-about .team-list p {
  margin: 0 !important;
  font-size: .87rem !important;
  line-height: 1.72 !important;
  color: #3A4750 !important;
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 1.6rem 1.85rem;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 1.45rem;
  bottom: -.2rem;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(110, 156, 138, .7));
}

.page-about .tl-item:last-child::before {
  display: none;
}

.page-about .tl-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: .55rem;
  width: 12px;
  height: 12px;
  background: var(--gold);
  border: 2px solid var(--char);
  box-shadow: 0 0 0 3px rgba(201, 162, 74, .18);
}

.page-about .tl-year {
  display: inline-block;
  margin: 0 0 .4rem;
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--ink);
  background: rgba(201, 162, 74, .22);
  border: 1px solid var(--line-strong);
  padding: .16rem .5rem;
  line-height: 1.4;
}

.page-about .tl-title {
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  margin: 0 0 .35rem;
  color: var(--ink);
}

.page-about .tl-text {
  margin: 0 0 .6rem !important;
  font-size: .89rem !important;
  line-height: 1.75 !important;
  color: #3A4750 !important;
}

.page-about .tl-more {
  border: 2px solid var(--char);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

.page-about .tl-more summary {
  cursor: pointer;
  padding: .55rem .8rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--ink);
  list-style: none;
}

.page-about .tl-more summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-more summary::before {
  content: "+";
  display: inline-block;
  width: 1em;
  color: var(--cinnabar);
  font-weight: 700;
}

.page-about .tl-more[open] summary::before {
  content: "−";
}

.page-about .tl-more summary:hover,
.page-about .tl-more summary:focus-visible {
  background: rgba(201, 162, 74, .16);
  outline: none;
}

.page-about .tl-more p {
  margin: 0 !important;
  padding: 0 .8rem .8rem;
  font-size: .84rem !important;
  line-height: 1.72 !important;
  color: #4A555F !important;
}

/* ---------- 能力数据 ---------- */

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: .7rem;
  margin-top: 1.4rem;
}

.page-about .stat {
  background: var(--paper);
  border-top: 3px solid var(--celadon);
  border-right: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  border-left: 1px solid var(--about-rule);
  padding: .8rem .85rem;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: .3rem;
}

.page-about .stat-key {
  display: block;
  font-size: .78rem;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 下一步 ---------- */

.page-about .next-grid {
  display: grid;
  gap: .9rem;
  margin-top: 1.4rem;
}

.page-about .next-card {
  display: block;
  text-decoration: none;
  background: var(--ink);
  color: var(--bone);
  border: 2px solid var(--char);
  box-shadow: var(--shadow-hard);
  padding: 1rem 1.1rem 1.15rem;
  transition: transform .18s ease, background-color .18s ease, box-shadow .18s ease;
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  transform: translate(-3px, -3px);
  background: var(--ink-2);
  box-shadow: 8px 8px 0 0 var(--cinnabar);
  outline: none;
}

.page-about .next-kicker {
  display: block;
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--gold);
  margin-bottom: .45rem;
}

.page-about .next-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: .35rem;
}

.page-about .next-text {
  display: block;
  font-size: .85rem;
  line-height: 1.7;
  color: rgba(244, 239, 230, .78);
}

/* ---------- 侧栏 ---------- */

.page-about .rail-card {
  background: var(--paper);
  border: 2px solid var(--char);
  box-shadow: var(--shadow-soft);
  padding: .95rem 1rem 1.05rem;
}

.page-about .rail-card--contact {
  background: var(--ink-2);
  color: var(--bone);
}

.page-about .rail-title {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--cinnabar);
  margin: 0 0 .75rem !important;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--about-rule);
  line-height: 1.4 !important;
}

.page-about .rail-card--contact .rail-title {
  color: var(--gold);
  border-bottom-color: var(--line-strong);
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-about .about-index a {
  display: flex;
  gap: .55rem;
  align-items: baseline;
  padding: .38rem .35rem;
  font-size: .85rem;
  color: var(--ink);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  background: rgba(201, 162, 74, .16);
  border-left-color: var(--cinnabar);
  color: var(--cinnabar);
  outline: none;
}

.page-about .about-index .mono {
  font-size: .72rem;
  color: var(--gold);
  flex: none;
}

.page-about .rail-fold {
  border-bottom: 1px dashed var(--about-rule);
  padding-bottom: .35rem;
  margin-bottom: .35rem;
}

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

.page-about .rail-fold summary {
  cursor: pointer;
  font-size: .87rem;
  font-weight: 700;
  color: var(--ink);
  padding: .3rem 0;
  list-style: none;
}

.page-about .rail-fold summary::-webkit-details-marker {
  display: none;
}

.page-about .rail-fold summary::before {
  content: "▸";
  color: var(--moss);
  margin-right: .4rem;
  display: inline-block;
  transition: transform .16s ease;
}

.page-about .rail-fold[open] summary::before {
  transform: rotate(90deg);
}

.page-about .rail-fold summary:hover,
.page-about .rail-fold summary:focus-visible {
  color: var(--cinnabar);
  outline: none;
}

.page-about .rail-fold p {
  margin: .1rem 0 .5rem !important;
  font-size: .82rem !important;
  line-height: 1.7 !important;
  color: #4A555F !important;
}

.page-about .rail-text {
  margin: 0 0 .8rem !important;
  font-size: .82rem !important;
  line-height: 1.7 !important;
  color: rgba(244, 239, 230, .78) !important;
}

.page-about .rail-card--contact .copy-btn {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  width: 100%;
  text-align: left;
  background: var(--ink);
  color: var(--bone);
  border: 2px solid var(--gold);
  padding: .5rem .65rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  cursor: pointer;
  transition: background-color .16s ease, color .16s ease, border-color .16s ease;
}

.page-about .rail-card--contact .copy-btn:hover,
.page-about .rail-card--contact .copy-btn:focus-visible {
  background: var(--gold);
  color: var(--char);
  border-color: var(--char);
  outline: none;
}

.page-about .rail-card--contact .copy-hint {
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .rail-card--contact .copy-btn:hover .copy-hint,
.page-about .rail-card--contact .copy-btn:focus-visible .copy-hint {
  color: var(--char);
}

.page-about .rail-link {
  margin: .75rem 0 0 !important;
  font-size: .8rem !important;
}

.page-about .rail-link a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .rail-link a:hover,
.page-about .rail-link a:focus-visible {
  border-bottom-color: var(--gold);
}

/* ---------- 断点 ---------- */

@media (min-width: 40rem) {
  .page-about .two-up {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }

  .page-about .hero-facts li {
    flex-direction: column;
    gap: .3rem;
  }

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

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

@media (min-width: 52rem) {
  .page-about .family-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 2rem;
  }

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

@media (min-width: 64rem) {
  .page-about .about-deck {
    grid-template-columns: minmax(0, 1fr) 19rem;
    gap: 3.5rem;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }

  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 3rem);
    padding-bottom: 3.25rem;
  }

  .page-about .about-hero .lede {
    font-size: 1.06rem;
  }
}

@media (min-width: 84rem) {
  .page-about .about-deck {
    grid-template-columns: minmax(0, 1fr) 21rem;
  }
}