.page-about {
  --about-rule: rgba(127, 216, 255, 0.2);
  --about-card-bg: linear-gradient(158deg, rgba(29, 53, 80, 0.44), rgba(14, 23, 36, 0.82));
  --about-gap: clamp(1.4rem, 4vw, 2.6rem);
}

.page-about [data-filter-item][hidden],
.page-about .filter-empty[hidden] {
  display: none;
}

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

.page-about .about-crumb-wrap {
  padding-top: 1.25rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-block: clamp(1.75rem, 5vw, 3.25rem) clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 8.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0.55rem 0 0;
}

.page-about .about-hero .lede {
  margin: 1.1rem 0 0;
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  line-height: 1.8;
  color: var(--mist);
  max-width: 46ch;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero-panel {
  position: relative;
  min-height: 240px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(110% 90% at 18% 8%, rgba(127, 216, 255, 0.24), transparent 62%),
    radial-gradient(90% 80% at 88% 92%, rgba(184, 255, 61, 0.16), transparent 66%),
    var(--ink-2);
  box-shadow: var(--shadow-float);
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
}

.page-about .about-hero-panel svg {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 240px;
}

.page-about .about-panel-label {
  position: absolute;
  left: 1.15rem;
  bottom: 1.35rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ice);
  opacity: 0.85;
}

/* ---------- 章节公共 ---------- */
.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.6vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 0.45rem 0 0.85rem;
}

.page-about .about-intro {
  max-width: 62ch;
  margin: 0 0 1.5rem;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .about-inline-link {
  display: inline-block;
  margin-top: 0.75rem;
  color: var(--ice);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 216, 255, 0.45);
  padding-bottom: 1px;
  min-height: 44px;
  line-height: 44px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .about-figure {
  margin: 1.5rem 0 0;
}

.page-about .about-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: inherit;
}

/* ---------- 时间线 ---------- */
.page-about .about-story {
  border-top: 1px solid var(--about-rule);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0 0 0 1.85rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.4rem;
  top: 0.4rem;
  bottom: 0.6rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--ice), rgba(127, 216, 255, 0.1));
}

.page-about .about-tl-item {
  position: relative;
  margin-bottom: 0.85rem;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -1.68rem;
  top: 1.1rem;
  width: 0.66rem;
  height: 0.66rem;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--ice);
  box-shadow: 0 0 0 4px rgba(127, 216, 255, 0.1);
}

.page-about .about-tl-node {
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-md);
  background: var(--about-card-bg);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-tl-node[open] {
  border-color: rgba(184, 255, 61, 0.42);
}

.page-about .about-tl-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.85rem;
  padding: 0.95rem 1.1rem;
  cursor: pointer;
  list-style: none;
  min-height: 44px;
}

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

.page-about .about-tl-node summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--lime);
  white-space: nowrap;
}

.page-about .about-tl-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--snow);
}

.page-about .about-tl-body {
  margin: 0;
  padding: 0 1.1rem 1.1rem;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.8;
  border-top: 1px solid rgba(29, 53, 80, 0.7);
  padding-top: 0.85rem;
}

/* ---------- 内容规模 ---------- */
.page-about .about-stat-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.page-about .about-stat-cell {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.15rem 1.05rem;
  background: var(--ink-2);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 6.5vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--snow);
}

.page-about .about-stat-num--lime {
  color: var(--lime);
}

.page-about .about-stat-num--ember {
  color: var(--ember);
}

.page-about .about-scale-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-note {
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-rule);
  background: var(--about-card-bg);
  padding: 1.35rem 1.25rem;
}

.page-about .about-note .card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 0.7rem;
  color: var(--snow);
}

.page-about .about-note p {
  margin: 0 0 0.7rem;
  color: var(--mist);
  font-size: 0.96rem;
  line-height: 1.8;
}

.page-about .about-note .card-meta {
  margin: 0;
  font-size: 0.82rem;
  color: var(--ice);
  letter-spacing: 0.01em;
}

/* ---------- 团队 ---------- */
.page-about .about-team-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.4rem 0 1.15rem;
}

.page-about .filter-chip {
  min-height: 44px;
  padding: 0.5rem 1.05rem;
  border-radius: var(--pill);
  border: 1px solid var(--about-rule);
  background: transparent;
  color: var(--snow);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .filter-chip:hover {
  border-color: rgba(127, 216, 255, 0.6);
}

.page-about .filter-chip:active {
  transform: scale(0.98);
}

.page-about .filter-chip:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .filter-chip[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

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

.page-about .about-team-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.3rem 1.2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-rule);
  background: var(--about-card-bg);
  position: relative;
  overflow: hidden;
}

.page-about .about-team-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 1.2rem;
  right: 1.2rem;
  height: 2px;
  background: linear-gradient(90deg, var(--ice), rgba(127, 216, 255, 0));
}

.page-about .about-team-count {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

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

.page-about .about-team-card p {
  margin: 0;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.78;
}

.page-about .about-team-card .card-meta {
  margin-top: auto;
  padding-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--ice);
}

.page-about .about-filter-empty {
  margin: 1rem 0 0;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px dashed var(--about-rule);
  color: var(--mist);
  font-size: 0.94rem;
}

/* ---------- 制作流程 ---------- */
.page-about .about-flow-section {
  background: linear-gradient(180deg, rgba(14, 23, 36, 0.85), rgba(6, 10, 16, 0));
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-flow-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

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

.page-about .about-flow-step {
  position: relative;
  padding: 1.15rem 1.1rem 1.2rem;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--ice);
  background: rgba(14, 23, 36, 0.72);
}

.page-about .about-flow-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--lime);
  margin-bottom: 0.4rem;
}

.page-about .about-flow-step h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--snow);
}

.page-about .about-flow-step p {
  margin: 0;
  color: var(--mist);
  font-size: 0.93rem;
  line-height: 1.78;
}

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

/* ---------- 合作生态 ---------- */
.page-about .about-partners-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: center;
}

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

.page-about .about-partner-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.85rem;
  margin: 0 0 1.15rem;
}

.page-about .about-partner-stat {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(29, 53, 80, 0.32);
  border: 1px solid var(--about-rule);
}

.page-about .about-partner-stat .about-stat-num {
  font-size: clamp(1.4rem, 4.6vw, 1.9rem);
  min-width: 2.6ch;
}

.page-about .about-partner-stat .stat-label {
  font-size: 0.9rem;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-partners-note {
  margin: 0 0 0.4rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--ember);
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.8;
}

/* ---------- 价值主张 ---------- */
.page-about .about-quote {
  margin: 1rem 0 1.6rem;
  padding: 0 0 0 1rem;
  border-left: 4px solid var(--lime);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 5.4vw, 2.35rem);
  line-height: 1.28;
  letter-spacing: -0.015em;
  color: var(--snow);
}

.page-about .about-value-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.page-about .about-value-copy p {
  margin: 0 0 0.9rem;
  color: var(--mist);
  font-size: 0.98rem;
  line-height: 1.82;
}

.page-about .about-value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-value-list li {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(29, 53, 80, 0.5), rgba(14, 23, 36, 0.6));
  border: 1px solid var(--about-rule);
  color: var(--snow);
  font-size: 0.93rem;
  line-height: 1.7;
}

.page-about .about-value-k {
  display: inline-block;
  margin-right: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-cta {
  margin-top: 2rem;
  padding: 1.5rem 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(184, 255, 61, 0.3);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(184, 255, 61, 0.12), transparent 60%),
    rgba(14, 23, 36, 0.86);
}

.page-about .about-cta-line {
  margin: 0 0 1.1rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--snow);
  max-width: 52ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-scale-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

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

  .page-about .about-cta {
    padding: 1.85rem 1.75rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-hero-panel,
  .page-about .about-hero-panel svg {
    min-height: 420px;
  }

  .page-about .about-team-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 2rem;
    align-items: end;
  }

  .page-about .about-team-head .about-figure {
    margin: 0;
  }

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

  .page-about .about-flow-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 2.25rem;
  }

  .page-about .about-partners-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(2rem, 4vw, 3rem);
  }

  .page-about .about-value-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 2.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .filter-chip,
  .page-about .about-tl-node {
    transition: none;
  }
}