.page-about {
  --about-panel: #0E1A30;
  --about-panel-2: #101C34;
  --about-body: #C6D3E6;
  color: var(--mist);
  font-family: var(--font-body);
  padding-bottom: 72px;
  overflow-x: clip;
}

.page-about .about-crumbs {
  padding-top: 6px;
  padding-bottom: 2px;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .breadcrumb-link {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

.page-about .breadcrumb-link:hover {
  color: var(--gold-soft);
}

.page-about .breadcrumb-sep {
  color: var(--line);
}

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

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 58px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .section-title {
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.6vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .section-head {
  display: block;
  margin-bottom: 6px;
}

.page-about .section-lead {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .section {
  padding: 52px 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: 14px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -80px 0 auto;
  height: 560px;
  background:
    radial-gradient(110% 90% at 82% 0%, rgba(69, 224, 208, 0.14), transparent 62%),
    radial-gradient(90% 80% at 6% 12%, rgba(245, 196, 81, 0.12), transparent 58%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  padding-top: 18px;
  padding-bottom: 4px;
}

.page-about .about-hero-lead {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--navy);
  box-shadow: 0 30px 64px -34px rgba(0, 0, 0, 0.95);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 18px 14px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
  background: linear-gradient(to top, rgba(7, 10, 18, 0.94), rgba(7, 10, 18, 0));
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--about-panel);
  padding: 15px 15px 17px;
  min-width: 0;
}

.page-about .stat-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-stat-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(21px, 5.4vw, 28px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat-unit {
  margin-left: 4px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--muted);
}

/* ---------- 起点 ---------- */
.page-about .about-origin-inner {
  max-width: 760px;
}

.page-about .about-origin-title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 40px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-origin-body p {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-origin-body .about-origin-lead {
  padding-left: 16px;
  border-left: 3px solid var(--gold);
  font-size: 18px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 四组 ---------- */
.page-about .crew-grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .crew-item {
  position: relative;
  background: linear-gradient(180deg, #17253F, var(--about-panel-2));
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow:
    0 1px 0 0 rgba(255, 255, 255, 0.04),
    9px 11px 0 -2px #0A1324,
    9px 11px 0 -1px rgba(42, 61, 94, 0.9),
    0 18px 36px -26px rgba(0, 0, 0, 0.95);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .crew-item:hover {
  border-color: #3A5580;
  transform: translateY(-2px);
}

.page-about .crew-h {
  margin: 0;
}

.page-about .crew-trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 17px 16px 15px;
  background: none;
  border: 0;
  border-radius: var(--radius-md);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

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

.page-about .crew-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
}

.page-about .crew-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .crew-trigger .tag {
  font-size: 11.5px;
}

.page-about .accordion-icon {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.page-about .accordion-icon::before,
.page-about .accordion-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-about .accordion-icon::before {
  width: 10px;
  height: 1.5px;
}

.page-about .accordion-icon::after {
  width: 1.5px;
  height: 10px;
}

.page-about .crew-trigger[aria-expanded="true"] .accordion-icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-about .accordion-panel {
  border-top: 1px dashed rgba(42, 61, 94, 0.9);
}

.page-about .crew-panel-inner {
  padding: 16px 16px 20px;
}

.page-about .crew-panel-inner p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .crew-panel-inner ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .crew-panel-inner li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .crew-panel-inner li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  background: linear-gradient(180deg, rgba(12, 23, 48, 0.92), rgba(7, 10, 18, 0));
  border-top: 1px solid rgba(42, 61, 94, 0.6);
  border-bottom: 1px solid rgba(42, 61, 94, 0.6);
}

.page-about .about-flow-inner {
  display: grid;
  gap: 28px;
}

.page-about .about-flow-lead {
  margin: 0 0 4px;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .flow-board {
  margin-top: 22px;
  padding: 20px 16px;
  background: rgba(20, 35, 63, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .flow-line {
  display: none;
  width: 100%;
  height: 40px;
  margin-bottom: 4px;
}

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

.page-about .flow-steps li {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.page-about .flow-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .flow-steps strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .flow-steps span:last-child {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-flow-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--navy);
}

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

/* ---------- 里程碑 ---------- */
.page-about .milestone-track {
  display: flex;
  gap: 16px;
  margin-top: 26px;
  padding: 4px 0 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .milestone {
  position: relative;
  flex: 0 0 auto;
  width: min(320px, 80vw);
  padding: 22px 20px 24px;
  scroll-snap-align: start;
  background: linear-gradient(160deg, rgba(20, 35, 63, 0.92), rgba(9, 16, 30, 0.92));
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(245, 196, 81, 0));
}

.page-about .milestone-stage {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .milestone h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--mist);
}

.page-about .milestone-body {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 栏目 ---------- */
.page-about .about-topics-inner {
  display: grid;
  gap: 32px;
}

.page-about .about-topics-lead {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .topic-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(42, 61, 94, 0.75);
}

.page-about .topic-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 4px;
  border-bottom: 1px solid rgba(42, 61, 94, 0.75);
  transition: background 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-about .topic-row:hover,
.page-about .topic-row:focus-visible {
  padding-left: 10px;
  background: rgba(69, 224, 208, 0.06);
  outline: none;
}

.page-about .topic-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
}

.page-about .topic-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .topic-freq {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--gold);
  white-space: nowrap;
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-topics-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--navy);
}

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

.page-about .about-partner {
  padding: 20px;
  background: rgba(20, 35, 63, 0.5);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-partner p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-inline-link {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(69, 224, 208, 0.45);
  padding-bottom: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-inline-link:hover {
  color: var(--gold-soft);
  border-color: var(--gold-soft);
}

/* ---------- 联络 ---------- */
.page-about .contact-card {
  display: grid;
  gap: 26px;
  padding: 24px 18px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(245, 196, 81, 0.12), transparent 58%),
    linear-gradient(180deg, var(--about-panel-2), #0A1222);
}

.page-about .contact-lead {
  margin: 0 0 22px;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .contact-methods {
  min-width: 0;
}

.page-about .contact-method-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .copy-chip {
  display: block;
  width: 100%;
  margin: 0 0 14px;
  padding: 10px 12px;
  text-align: left;
  background: rgba(7, 10, 18, 0.62);
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  word-break: break-word;
  cursor: pointer;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .copy-chip:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

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

.page-about .copy-chip.is-copied {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .contact-hours {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.page-about .copy-status {
  margin: 10px 0 0;
  min-height: 18px;
  font-size: 12.5px;
  color: var(--cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    margin-top: 32px;
  }

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

  .page-about .flow-line {
    display: block;
  }

  .page-about .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .crew-trigger {
    padding: 18px 20px 16px;
  }

  .page-about .crew-panel-inner {
    padding: 16px 20px 22px;
  }
}

@media (hover: hover) and (pointer: fine) {
  .page-about .topic-freq {
    opacity: 0;
    transform: translateX(6px);
  }

  .page-about .topic-row:hover .topic-freq,
  .page-about .topic-row:focus-visible .topic-freq {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 860px) {
  .page-about .about-flow-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 44px;
  }

  .page-about .contact-card {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 44px;
    align-items: start;
    padding: 40px 36px;
  }
}

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 96px;
  }

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

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: end;
    gap: 52px;
    padding-top: 44px;
  }

  .page-about .about-hero::before {
    height: 620px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 44px;
  }

  .page-about .crew-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 28px;
    margin-top: 36px;
    align-items: start;
  }

  .page-about .crew-item:nth-child(even) {
    margin-top: 34px;
  }

  .page-about .about-topics-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .milestone-track {
    gap: 22px;
    margin-top: 34px;
    overflow-x: visible;
  }

  .page-about .milestone {
    flex: 1 1 0;
    width: auto;
    min-width: 0;
    padding: 26px 24px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }

  .page-about .crew-item:hover {
    transform: none;
  }
}