.page-about .about-hero {
  padding: 28px 0 40px;
  background: linear-gradient(180deg, var(--amber-tint) 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-hero-copy .display-1 {
  margin: 10px 0 0;
  color: var(--ink);
}

.page-about .about-hero-lead {
  margin: 18px 0 0;
  max-width: 46ch;
  color: var(--ink);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--paper);
}

.page-about .about-stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--amber-core);
  line-height: 1.1;
}

.page-about .about-stat-label {
  font-size: 0.86rem;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-hero-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--sand);
}

.page-about .about-hero-figure img,
.page-about .about-team-figure img,
.page-about .about-tl-visual img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-flow {
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-sec {
  padding-top: clamp(36px, 5vw, 64px);
}

.page-about .about-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-col-body a,
.page-about .about-team-more a,
.page-about .about-promise-note a,
.page-about .about-next a {
  color: var(--ink-qing);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--t) var(--ease), text-decoration-color var(--t) var(--ease);
}

.page-about .about-col-body a:hover,
.page-about .about-team-more a:hover,
.page-about .about-promise-note a:hover,
.page-about .about-next a:hover {
  color: var(--cyan-ink);
}

.page-about .about-tl-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 34px;
}

.page-about .about-tl-year {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-tl-tag {
  display: inline-block;
  padding: 3px 9px;
  background: var(--amber-deep);
  color: var(--neon);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border: 1px solid var(--neon);
}

.page-about .about-tl-year-num {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-tl-panel {
  transition: border-color var(--t) var(--ease);
}

.page-about .about-tl-panel:hover {
  border-color: var(--neon);
}

.page-about .about-tl-panel .panel-body p {
  margin: 0;
  max-width: 62ch;
}

.page-about .about-more {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-more summary {
  display: inline-block;
  cursor: pointer;
  list-style: none;
  color: var(--ink-qing);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  transition: color var(--t) var(--ease);
}

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

.page-about .about-more summary::after {
  content: " +";
  font-family: var(--font-mono);
  color: var(--amber-core);
}

.page-about .about-more[open] summary::after {
  content: " –";
}

.page-about .about-more summary:hover {
  color: var(--cyan-ink);
}

.page-about .about-more p {
  margin: 10px 0 0;
  max-width: 62ch;
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .about-tl-visual {
  margin: 0 0 34px;
}

.page-about .about-tl-visual figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--sand);
}

.page-about .about-scope-wrap {
  margin-top: 22px;
}

.page-about .about-filter-btn {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background var(--t) var(--ease), color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-filter-btn:hover {
  border-color: var(--amber-core);
}

.page-about .about-filter-input:checked + .about-filter-btn {
  background: var(--amber-deep);
  border-color: var(--amber-deep);
  color: var(--paper);
}

.page-about .about-filter-input:focus-visible + .about-filter-btn {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .about-scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 18px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-scope-card {
  padding: 22px 20px 24px;
  background: var(--paper);
  transition: background var(--t) var(--ease);
}

.page-about .about-scope-card:hover {
  background: var(--amber-tint);
}

.page-about .about-scope-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--amber-core);
  color: var(--neon);
  border: 1px solid var(--neon);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: background var(--t) var(--ease);
}

.page-about .about-scope-card:hover .about-scope-num {
  background: var(--amber-deep);
}

.page-about .about-scope-title {
  margin: 14px 0 8px;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-scope-card p {
  margin: 0;
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-team-copy .display-2 {
  margin: 10px 0 16px;
}

.page-about .about-team-copy .prose p {
  margin: 0 0 14px;
}

.page-about .about-team-bar {
  margin-top: 26px;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.page-about .about-team-bar-cap {
  margin: 0 0 12px;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-qing);
}

.page-about .about-team-track {
  display: flex;
  height: 26px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.page-about .about-team-seg {
  height: 100%;
  box-sizing: border-box;
  border-right: 1px solid var(--paper);
}

.page-about .about-team-seg:last-child {
  border-right: 0;
}

.page-about .about-team-seg--rate {
  flex: 12 0 0;
  background: var(--amber-core);
}

.page-about .about-team-seg--channel {
  flex: 9 0 0;
  background: var(--snow-qing);
}

.page-about .about-team-seg--site {
  flex: 21 0 0;
  background: var(--sand);
}

.page-about .about-team-seg--rest {
  flex: 6 0 0;
  background: var(--amber-tint);
}

.page-about .about-team-legend {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 9px;
}

.page-about .about-team-legend li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.9rem;
  color: var(--ink);
}

.page-about .about-team-legend .u-mono {
  font-weight: 700;
  color: var(--amber-core);
  font-size: 1.1rem;
}

.page-about .about-dot {
  flex: none;
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 1px solid var(--line);
}

.page-about .about-dot--rate { background: var(--amber-core); }
.page-about .about-dot--channel { background: var(--snow-qing); }
.page-about .about-dot--site { background: var(--sand); }
.page-about .about-dot--rest { background: var(--amber-tint); }

.page-about .about-team-more {
  margin: 22px 0 0;
  max-width: 62ch;
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .about-team-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--sand);
}

.page-about .about-promise {
  padding: 26px 22px 28px;
  background: var(--amber-deep);
  border: 1px solid var(--amber-deep);
}

.page-about .about-promise-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .about-promise-title {
  margin: 12px 0 24px;
  font-size: var(--fs-section);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
  line-height: 1.25;
}

.page-about .about-promise-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair-dark);
  border: 1px solid var(--hair-dark);
}

.page-about .about-promise-item {
  padding: 18px 16px 20px;
  background: var(--amber-deep);
}

.page-about .about-promise-num {
  display: block;
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  letter-spacing: 0.02em;
}

.page-about .about-promise-item p {
  margin: 10px 0 0;
  color: var(--amber-tint);
  font-size: 0.92rem;
  line-height: 1.75;
}

.page-about .about-promise-note {
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--paper);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .about-promise-note a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-promise-note a:hover {
  color: var(--amber-tint);
}

.page-about .about-cred-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 22px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-cred-card {
  padding: 22px 20px 24px;
  background: var(--amber-tint);
}

.page-about .about-cred-label {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-qing);
}

.page-about .about-cred-value {
  margin: 10px 0 0;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.4;
}

.page-about .about-cred-value .u-mono {
  font-size: 1.15rem;
  color: var(--amber-core);
}

.page-about .about-cred-note {
  margin: 12px 0 0;
  color: var(--ink);
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-next p {
  flex: 1 1 260px;
  margin: 0;
  max-width: 62ch;
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.8;
}

@media (min-width: 720px) {
  .page-about .about-scope-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-promise {
    padding: 34px 32px 36px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 44px 0 56px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-hero-figure {
    align-self: start;
  }

  .page-about .about-two-col {
    grid-template-columns: minmax(0, 0.34fr) minmax(0, 0.66fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-tl-list::before {
    content: "";
    position: absolute;
    top: 12px;
    bottom: 34px;
    left: 107px;
    width: 1px;
    background: var(--line);
  }

  .page-about .about-tl-item {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 32px;
    padding-bottom: 44px;
  }

  .page-about .about-tl-item::before {
    content: "";
    position: absolute;
    left: 102px;
    top: 24px;
    width: 11px;
    height: 11px;
    border: 2px solid var(--paper);
    background: var(--amber-core);
    box-sizing: content-box;
    box-shadow: 0 0 0 1px var(--amber-core);
  }

  .page-about .about-tl-year {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .about-tl-visual {
    padding-bottom: 44px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 40px;
    align-items: start;
  }

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

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

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