.page-about {
  --about-deep: #2C3E50;
  --about-warm: #EAECEE;
  --about-card: #FFFFFF;
  --about-orange: #E67E22;
  --about-yellow: #F1C40F;
  --about-teal: #1ABC9C;
  --about-blue: #3498DB;
  --about-muted: #6B7A7D;
  --about-border: #BDC3C7;
  --about-radius: 10px;
  background: var(--about-warm);
}

.page-about .sac-layout {
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .sac-aside {
  position: relative;
  background: var(--about-deep);
  color: #FDFEFE;
  padding: 28px 20px 36px;
}

.page-about .sac-aside .breadcrumb a {
  color: rgba(253, 254, 254, 0.72);
}

.page-about .sac-aside .breadcrumb a:hover,
.page-about .sac-aside .breadcrumb a:focus-visible {
  color: #FFFFFF;
}

.page-about .sac-aside .breadcrumb-sep {
  color: rgba(253, 254, 254, 0.4);
}

.page-about .sac-aside .breadcrumb [aria-current="page"] {
  color: var(--about-yellow);
}

.page-about .sac-caption {
  margin: 28px 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--about-yellow);
}

.page-about .sac-title {
  margin: 0 0 16px;
  font-size: 32px;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .sac-lead {
  margin: 0 0 28px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(253, 254, 254, 0.82);
}

.page-about .sac-anchor {
  display: grid;
  gap: 2px;
  margin: 0 0 28px;
  border-top: 1px solid rgba(253, 254, 254, 0.16);
}

.page-about .sac-anchor a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 2px;
  color: rgba(253, 254, 254, 0.72);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid rgba(253, 254, 254, 0.16);
  transition: padding-left 0.18s ease, color 0.18s ease;
}

.page-about .sac-anchor a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(253, 254, 254, 0.35);
}

.page-about .sac-anchor a:hover,
.page-about .sac-anchor a:focus-visible {
  color: var(--about-yellow);
  padding-left: 8px;
  outline: none;
}

.page-about .aside-foot {
  border-left: 3px solid var(--about-orange);
  padding: 12px 14px;
  background: rgba(253, 254, 254, 0.06);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(253, 254, 254, 0.7);
}

.page-about .aside-foot p {
  margin: 0;
}

.page-about .sac-main {
  padding: 32px 16px 48px;
}

.page-about .section-block {
  margin-bottom: 52px;
}

.page-about .ov-wrap {
  display: grid;
  gap: 18px;
}

.page-about .ov-cardwall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .ov-card {
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-top: 3px solid transparent;
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-sm);
  padding: 18px 16px;
  min-height: 158px;
  display: flex;
  flex-direction: column;
}

.page-about .ov-card.is-orange {
  border-top-color: var(--about-orange);
}

.page-about .ov-card.is-teal {
  border-top-color: var(--about-teal);
}

.page-about .ov-card.is-blue {
  border-top-color: var(--about-blue);
}

.page-about .ov-card.is-yellow {
  border-top-color: var(--about-yellow);
}

.page-about .ov-icon {
  width: 30px;
  height: 30px;
  margin-bottom: 10px;
}

.page-about .ov-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-about .ov-num {
  margin: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.page-about .ov-name {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.page-about .ov-note {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-muted);
}

.page-about .ov-tag {
  margin-top: auto;
  align-self: flex-start;
  padding: 4px 9px;
  border-radius: 4px;
  background: var(--about-warm);
  font-size: 12px;
  color: var(--text-main);
}

.page-about .ov-figure {
  margin: 0;
  padding: 16px;
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.page-about .ov-figure img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

.page-about .ov-figure figcaption {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

.page-about .dim-illus-wrap {
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .dim-illus-wrap img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--about-border);
}

.page-about .dim-illus-wrap figcaption {
  font-size: 13px;
  color: var(--text-muted);
}

.page-about .dim-wrap {
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.page-about .dim-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-border);
}

.page-about .dim-card {
  display: flex;
  flex-direction: column;
  color: var(--text-main);
  text-decoration: none;
  padding: 22px 20px 18px;
  position: relative;
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}

.page-about .dim-card:hover,
.page-about .dim-card:focus-visible {
  box-shadow: inset 0 0 0 2px var(--text-main);
  outline: none;
  transform: translateY(-1px);
  z-index: 1;
}

.page-about .dim-card.is-yellow {
  background: var(--about-yellow);
}

.page-about .dim-card.is-teal {
  background: var(--about-teal);
}

.page-about .dim-card.is-blue {
  background: var(--about-blue);
}

.page-about .dim-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(44, 62, 80, 0.65);
  margin-bottom: 8px;
}

.page-about .dim-title {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 10px;
}

.page-about .dim-desc {
  font-size: 14px;
  line-height: 1.68;
  margin: 0 0 14px;
  color: rgba(44, 62, 80, 0.88);
}

.page-about .dim-foot {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 5px;
  padding: 6px 10px;
  color: var(--text-main);
}

.page-about .dim-expand {
  margin-top: 14px;
  font-size: 13px;
  font-weight: 700;
  color: rgba(44, 62, 80, 0.72);
}

.page-about .dim-panels {
  background: var(--about-warm);
  padding: 20px;
}

.page-about .dim-panel + .dim-panel {
  border-top: 1px dashed var(--about-border);
  margin-top: 18px;
  padding-top: 18px;
}

.page-about .dim-panel h4 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--text-main);
}

.page-about .dim-panel p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-about .dim-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .dim-list li {
  padding: 6px 10px;
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: 5px;
  font-size: 13px;
  color: var(--text-main);
}

.page-about .tl {
  position: relative;
  padding-left: 26px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--about-border);
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 18px;
}

.page-about .tl-node {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-blue);
  border: 2px solid var(--about-card);
  box-shadow: 0 0 0 1px var(--about-border);
}

.page-about .tl-node.is-current {
  background: var(--about-orange);
  box-shadow: 0 0 0 4px rgba(230, 126, 34, 0.2);
}

.page-about .tl-card {
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: 10px;
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}

.page-about .tl-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.page-about .tl-batch {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  padding: 3px 9px;
  border-radius: 4px;
  background: var(--about-deep);
  color: #FDFEFE;
}

.page-about .tl-time {
  font-size: 13px;
  color: var(--text-muted);
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 7px;
  border-radius: 4px;
  background: var(--about-warm);
  color: var(--text-main);
}

.page-about .status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid transparent;
}

.page-about .status-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.page-about .status-badge.is-new {
  background: rgba(26, 188, 156, 0.12);
  color: #0E6655;
  border-color: rgba(26, 188, 156, 0.35);
}

.page-about .status-badge.is-updating {
  background: rgba(231, 76, 60, 0.1);
  color: #B03A2E;
  border-color: rgba(231, 76, 60, 0.35);
}

.page-about .status-badge.is-done {
  background: rgba(52, 152, 219, 0.1);
  color: #1F618D;
  border-color: rgba(52, 152, 219, 0.35);
}

.page-about .tl-head {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--text-main);
}

.page-about .tl-desc {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-about .tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl-tags li {
  font-size: 12px;
  padding: 4px 9px;
  border-radius: 4px;
  background: var(--about-warm);
  color: var(--text-main);
}

.page-about .tl-more {
  border: 1px solid var(--about-border);
  border-radius: 10px;
  background: var(--about-card);
}

.page-about .tl-more summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.page-about .tl-more summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--about-orange);
}

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

.page-about .tl-more-list {
  padding: 4px 18px 16px;
  border-top: 1px dashed var(--about-border);
}

.page-about .tl-more-list .tl-item {
  margin-top: 16px;
}

.page-about .batch-foot {
  margin-top: 24px;
}

.page-about .path-grid {
  display: grid;
  gap: 20px;
}

.page-about .path-steps {
  display: grid;
  gap: 14px;
}

.page-about .path-step {
  padding: 18px 18px 16px;
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-left: 4px solid var(--about-orange);
  border-radius: 10px;
}

.page-about .path-step:last-of-type {
  border-left-color: var(--about-teal);
}

.page-about .path-no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--about-orange);
}

.page-about .path-step:last-of-type .path-no {
  color: var(--about-teal);
}

.page-about .path-title {
  margin: 6px 0 6px;
  font-size: 18px;
  color: var(--text-main);
}

.page-about .path-desc {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-about .path-tag {
  display: inline-block;
  font-size: 12px;
  padding: 4px 9px;
  border-radius: 4px;
  background: var(--about-warm);
  color: var(--text-main);
}

.page-about .path-arrow {
  text-align: center;
  font-size: 26px;
  line-height: 1;
  color: var(--about-orange);
}

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

.page-about .path-figure img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--about-border);
  display: block;
}

.page-about .path-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .related-grid {
  display: grid;
  gap: 14px;
}

.page-about .related-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 16px;
  background: var(--about-card);
  border: 1px solid var(--about-border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}

.page-about .related-card:hover,
.page-about .related-card:focus-visible {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  outline: none;
}

.page-about .related-card strong {
  font-size: 16px;
}

.page-about .related-card span {
  font-size: 13px;
  color: var(--text-muted);
}

.page-about .related-card .related-go {
  margin-top: 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--about-orange);
}

@media (min-width: 720px) {
  .page-about .ov-wrap {
    grid-template-columns: 1fr 300px;
  }

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

  .page-about .dim-panels {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .dim-panel + .dim-panel {
    border-top: none;
    border-left: 1px dashed var(--about-border);
    margin-top: 0;
    padding-top: 0;
    padding-left: 20px;
  }

  .page-about .path-steps {
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 18px;
  }

  .page-about .path-arrow {
    font-size: 30px;
  }

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

@media (min-width: 1024px) {
  .page-about .sac-layout {
    grid-template-columns: 300px minmax(0, 1fr);
    max-width: var(--container-max);
    margin: 0 auto;
  }

  .page-about .sac-aside {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: 44px 32px;
  }

  .page-about .sac-main {
    padding: 48px 44px 64px;
  }
}

@media (max-width: 379px) {
  .page-about .ov-cardwall {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .sac-anchor a,
  .page-about .dim-card,
  .page-about .related-card {
    transition: none;
  }
}