.page-about {
  --about-index-w: 236px;
  --about-gap: clamp(28px, 4vw, 56px);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h, 70px) + 28px) 0 clamp(36px, 6vw, 68px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(108, 92, 231, .10), transparent 62%),
    radial-gradient(90% 70% at 0% 100%, rgba(46, 125, 166, .10), transparent 60%),
    var(--paper);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -30%;
  width: 58%;
  height: 64%;
  background: linear-gradient(135deg, rgba(11, 110, 79, .16), rgba(46, 125, 166, .08) 55%, transparent);
  transform: rotate(-9deg);
  border-radius: 48px;
  pointer-events: none;
  z-index: 0;
}

.page-about .hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-about .hero-canvas img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .42;
}

.page-about .hero-canvas::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(175deg, rgba(253, 252, 248, .70) 0%, rgba(253, 252, 248, .90) 46%, var(--paper) 100%);
}

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

.page-about .about-crumbs {
  margin-bottom: 22px;
}

.page-about .about-crumbs .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-crumbs .crumb {
  font-size: .85rem;
  color: var(--ink-faint);
}

.page-about .about-crumbs .crumb + .crumb::before {
  content: "›";
  margin-right: 6px;
  color: var(--ink-faint);
}

.page-about .about-crumbs .crumb-link {
  color: var(--fir);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-crumbs .crumb-link:hover {
  color: var(--maple);
  border-bottom-color: var(--maple);
}

.page-about .hero-grid {
  display: grid;
  gap: 26px;
}

.page-about .hero-copy .eyebrow {
  color: var(--maple);
  font-weight: 700;
  letter-spacing: .1em;
  font-size: .82rem;
  margin: 0;
}

.page-about .hero-copy h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin: 12px 0 18px;
  max-width: 16em;
}

.page-about .hero-copy .lead {
  font-size: clamp(1rem, 2.2vw, 1.12rem);
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 42em;
  margin: 0;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .hero-note {
  background: var(--snow);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  padding: 22px;
}

.page-about .hero-note .note-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--fir);
  margin: 0 0 14px;
}

.page-about .hero-note .note-list {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .hero-note .note-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .hero-note .note-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .hero-note .note-key {
  font-size: .85rem;
  color: var(--ink-faint);
  margin: 0;
}

.page-about .hero-note .note-val {
  margin: 0;
  font-weight: 600;
  color: var(--ink);
  font-size: .92rem;
}

/* ---------- 编辑器式双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  gap: var(--about-gap);
  padding-block: clamp(32px, 5vw, 68px);
}

.page-about .about-index {
  font-size: .9rem;
}

.page-about .index-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--fir);
  margin: 0 0 12px;
}

.page-about .index-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  text-decoration: none;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .index-link .mono {
  font-size: .76rem;
  color: var(--gold);
  letter-spacing: .04em;
}

.page-about .index-link:hover {
  color: var(--maple);
  background: rgba(200, 16, 46, .05);
  border-left-color: var(--maple);
}

.page-about .index-note {
  font-size: .82rem;
  line-height: 1.75;
  color: var(--ink-faint);
  margin: 0;
}

.page-about .index-note a {
  color: var(--glacier);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 125, 166, .35);
}

.page-about .index-note a:hover {
  color: var(--maple);
  border-bottom-color: var(--maple);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h, 70px) + 24px);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .section-head .eyebrow {
  color: var(--maple);
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .1em;
  margin: 0;
}

.page-about .section-head h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.05rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  margin: 10px 0 12px;
}

.page-about .section-head .lead {
  color: var(--ink-soft);
  line-height: 1.8;
  max-width: 46em;
  margin: 0;
}

/* ---------- 品牌故事 ---------- */
.page-about .story-grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .story-body p {
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

.page-about .story-body p:first-child {
  font-size: 1.05rem;
  color: var(--ink);
}

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

.page-about .side-quote {
  border-left: 3px solid var(--maple);
  padding: 4px 0 4px 16px;
  margin: 0 0 18px;
}

.page-about .side-quote .quote-mark {
  font-family: var(--font-head);
  font-size: 2.4rem;
  line-height: .8;
  color: var(--maple);
  opacity: .32;
  margin: 0;
}

.page-about .side-quote p:last-child {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 6px 0 0;
  color: var(--ink);
}

.page-about .side-note {
  background: rgba(217, 154, 43, .09);
  border: 1px solid rgba(217, 154, 43, .28);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.page-about .side-note-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: .86rem;
  color: #8a5d10;
  margin: 0 0 6px;
}

.page-about .side-note p:last-child {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 团队 ---------- */
.page-about .team-figure {
  margin: 22px 0 22px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .filter-btn {
  font: inherit;
  font-weight: 700;
  font-size: .85rem;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(46, 125, 166, .38);
  background: var(--snow);
  color: var(--glacier);
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .filter-btn:hover {
  border-color: var(--glacier);
  transform: translateY(-1px);
}

.page-about .filter-btn[data-active],
.page-about .filter-btn[aria-pressed="true"] {
  background: var(--glacier);
  border-color: var(--glacier);
  color: #fff;
}

.page-about .filter-status {
  font-size: .82rem;
  color: var(--ink-faint);
  margin-left: auto;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about [data-filtered-out] {
  display: none !important;
}

.page-about .team-card {
  position: relative;
  overflow: hidden;
  background: var(--snow);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-1);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--maple), var(--gold));
  opacity: 0;
  transition: opacity .25s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
  border-color: var(--line);
}

.page-about .team-card:hover::before {
  opacity: 1;
}

.page-about .team-role {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--fir);
  margin: 0 0 10px;
}

.page-about .team-card h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.45;
  margin: 0 0 10px;
}

.page-about .team-card p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .team-meta {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 5px;
}

.page-about .team-meta li {
  position: relative;
  padding-left: 14px;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--ink-faint);
}

.page-about .team-meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 信息合作 ---------- */
.page-about .source-list {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-about .source-note {
  background: var(--snow);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .source-note[open] {
  border-color: rgba(11, 110, 79, .45);
  box-shadow: var(--shadow-1);
}

.page-about .source-note > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  transition: background .2s var(--ease);
}

.page-about .source-note > summary::-webkit-details-marker {
  display: none;
}

.page-about .source-note[open] > summary {
  background: rgba(11, 110, 79, .05);
}

.page-about .source-num {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--maple);
  min-width: 2.6ch;
}

.page-about .source-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.02rem;
}

.page-about .source-note .node-hint {
  margin-left: auto;
  font-size: .78rem;
  color: var(--ink-faint);
  white-space: nowrap;
}

.page-about .source-body {
  padding: 0 18px 18px;
}

.page-about .source-body p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.85;
  font-size: .94rem;
}

/* ---------- 使用规模 ---------- */
.page-about .scale-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.page-about .scale-stats .stat {
  background: linear-gradient(158deg, var(--snow), var(--mist));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 18px;
}

.page-about .scale-stats .stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.45rem, 4vw, 1.95rem);
  letter-spacing: -.02em;
  color: var(--maple);
  margin: 0 0 6px;
}

.page-about .scale-stats .stat-label {
  margin: 0;
  font-size: .84rem;
  line-height: 1.65;
  color: var(--ink-faint);
}

.page-about .scale-note {
  margin-top: 16px;
  padding: 14px 18px;
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(217, 154, 43, .08);
}

.page-about .scale-note p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.85;
}

/* ---------- 发展历程 ---------- */
.page-about .about-journey {
  border-top: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: clamp(24px, 4vw, 42px);
  margin-top: clamp(12px, 2vw, 22px);
}

.page-about .journey-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-about .journey-canvas img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .2;
}

.page-about .journey-canvas::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 90% at 12% 0%, rgba(11, 110, 79, .12), transparent 62%),
    radial-gradient(90% 80% at 92% 100%, rgba(46, 125, 166, .14), transparent 60%),
    rgba(253, 252, 248, .93);
}

.page-about .about-journey > *:not(.journey-canvas) {
  position: relative;
  z-index: 1;
}

.page-about .journey-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 28px;
  position: relative;
}

.page-about .journey-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--fir), rgba(11, 110, 79, .12));
}

.page-about .timeline-item {
  position: relative;
  margin-bottom: 4px;
}

.page-about .journey-timeline .node-dot {
  position: absolute;
  left: -28px;
  top: 9px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--maple);
  box-shadow: 0 0 0 4px rgba(200, 16, 46, .10);
  transition: background .22s var(--ease), box-shadow .22s var(--ease);
  z-index: 1;
}

.page-about .timeline-item:hover .node-dot,
.page-about .node-details[open] + .node-dot {
  background: var(--maple);
  box-shadow: 0 0 0 6px rgba(200, 16, 46, .14);
}

.page-about .node-details > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 6px 12px 6px 0;
  border-radius: var(--radius-sm);
  transition: background .2s var(--ease);
}

.page-about .node-details > summary::-webkit-details-marker {
  display: none;
}

.page-about .node-details > summary:hover {
  background: rgba(46, 125, 166, .06);
}

.page-about .node-label {
  font-size: .95rem;
  font-weight: 700;
  color: var(--maple);
  letter-spacing: .02em;
}

.page-about .node-hint {
  font-size: .88rem;
  color: var(--ink-soft);
}

.page-about .node-details > summary::after {
  content: "展开";
  margin-left: auto;
  font-size: .72rem;
  font-weight: 700;
  color: var(--glacier);
  border: 1px solid rgba(46, 125, 166, .42);
  border-radius: var(--radius-pill);
  padding: 1px 9px;
  white-space: nowrap;
}

.page-about .node-details[open] > summary::after {
  content: "收起";
}

.page-about .journey-timeline .timeline-body {
  padding: 6px 0 16px;
}

.page-about .timeline-summary {
  margin: 0;
  max-width: 62ch;
  color: var(--ink-soft);
  line-height: 1.85;
  font-size: .94rem;
}

.page-about .journey-more {
  margin: 20px 0 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ink-faint);
}

.page-about .journey-more a {
  color: var(--glacier);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 125, 166, .4);
}

.page-about .journey-more a:hover {
  color: var(--maple);
  border-bottom-color: var(--maple);
}

/* ---------- 结尾召唤 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(26px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: linear-gradient(132deg, var(--fir) 0%, #0E7A57 46%, var(--glacier) 100%);
  color: #fff;
  box-shadow: var(--shadow-2);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 62%;
  height: 180%;
  background: radial-gradient(circle at 60% 40%, rgba(108, 92, 231, .45), transparent 66%);
  pointer-events: none;
}

.page-about .about-cta > * {
  position: relative;
  z-index: 1;
}

.page-about .about-cta h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.35rem, 3.2vw, 1.9rem);
  line-height: 1.3;
  color: #fff;
  margin: 0 0 10px;
}

.page-about .about-cta p {
  margin: 0 0 22px;
  max-width: 50em;
  line-height: 1.85;
  color: rgba(255, 255, 255, .88);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .about-cta .btn-primary {
  background: #fff;
  color: var(--maple-deep);
  border-color: #fff;
}

.page-about .about-cta .btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .55);
}

.page-about .cta-link {
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  text-decoration: underline;
  text-underline-offset: 4px;
  padding: 6px 0;
}

.page-about .cta-link:hover {
  color: #FFE7B8;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 619px) {
  .page-about .filter-status {
    margin-left: 0;
    width: 100%;
  }

  .page-about .source-note .node-hint {
    display: none;
  }

  .page-about .about-journey,
  .page-about .about-cta {
    border-radius: var(--radius-md);
  }
}

@media (max-width: 999px) {
  .page-about .about-index {
    padding-bottom: 4px;
    border-bottom: 1px solid var(--line-soft);
  }

  .page-about .index-list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
  }

  .page-about .index-link {
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    padding: 7px 14px;
    white-space: nowrap;
    background: var(--snow);
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .story-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(220px, .9fr);
    gap: 32px;
  }

  .page-about .scale-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 920px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(270px, .72fr);
    align-items: end;
    gap: clamp(28px, 5vw, 64px);
  }

  .page-about .hero-note {
    transform: translateY(24px);
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h, 70px) + 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .filter-btn,
  .page-about .index-link,
  .page-about .journey-timeline .node-dot {
    transition: none;
  }

  .page-about .hero-note {
    transform: none;
  }
}