.page-about {
  --about-line: 2px solid var(--edge);
  --about-pad: clamp(18px, 3vw, 32px);
  background:
    radial-gradient(circle at 84% 6%, rgba(255, 106, 42, 0.12), transparent 46%),
    linear-gradient(160deg, rgba(184, 255, 61, 0.07), rgba(6, 42, 35, 0) 38%),
    var(--jade);
  color: var(--fog);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

.page-about .wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel);
  margin: 0 0 22px;
}

.page-about .crumbs a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(28px, 6vw, 64px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  align-items: center;
}

.page-about .about-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sand);
  margin: 0 0 12px;
}

.page-about .display {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5.4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
  color: var(--fog);
  max-width: 18em;
}

.page-about .lede {
  margin: 0;
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  line-height: 1.8;
  color: rgba(244, 247, 242, 0.84);
  max-width: 40em;
}

.page-about .about-hero-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 22px 0 0;
  padding: 14px 0 0;
  border-top: var(--about-line);
  font-size: 13px;
  color: var(--steel);
}

.page-about .about-hero-tags li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-hero-tags .num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero-figure {
  margin: 0;
  border: var(--about-line);
  background: var(--coal);
  clip-path: polygon(0 0, 100% 0, 100% 93%, 0 100%);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- layout with index ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
}

.page-about .about-index-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--steel);
  margin: 0 0 12px;
}

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

.page-about .about-index-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: var(--about-line);
  background: rgba(18, 59, 50, 0.55);
  color: var(--steel);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: color 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-index-link:hover .about-index-num,
.page-about .about-index-link:focus-visible .about-index-num {
  color: var(--ink);
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .about-body {
  min-width: 0;
}

/* ---------- blocks ---------- */
.page-about .about-block {
  padding: clamp(24px, 4vw, 44px) 0;
  border-top: var(--about-line);
}

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

.page-about .about-block-head {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.2vw, 2rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--fog);
  max-width: 24em;
}

.page-about .about-p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.8);
  max-width: 40em;
}

/* ---------- work rows ---------- */
.page-about .work-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: var(--about-line);
}

.page-about .work-row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: var(--about-line);
}

.page-about .work-row .idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--sand);
}

.page-about .work-name {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--fog);
}

.page-about .work-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 247, 242, 0.78);
}

/* ---------- split / tree ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
  align-items: start;
}

.page-about .tree {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-about .tree-node {
  border: var(--about-line);
  background: rgba(18, 59, 50, 0.55);
}

.page-about .tree-node summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  font-weight: 800;
  font-size: 0.98rem;
  color: var(--fog);
}

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

.page-about .tree-node summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--lime);
  line-height: 1;
}

.page-about .tree-node[open] summary {
  border-bottom: var(--about-line);
  color: var(--lime);
}

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

.page-about .tree-node summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -4px;
}

.page-about .tree-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
  font-weight: 600;
  margin-left: auto;
}

.page-about .tree-body {
  display: grid;
  gap: 10px;
  padding: 12px 14px 14px;
}

.page-about .tree-branch {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 247, 242, 0.78);
  border-left: 2px solid var(--sand);
  padding-left: 10px;
}

.page-about .tree-branch b {
  color: var(--fog);
  margin-right: 6px;
  font-weight: 800;
}

.page-about .about-media {
  margin: 0;
  border: var(--about-line);
  background: var(--coal);
  overflow: hidden;
  min-width: 0;
}

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

.page-about .about-media--wide {
  margin-bottom: clamp(16px, 3vw, 24px);
}

/* ---------- duty grid ---------- */
.page-about .duty-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .duty-card {
  border: var(--about-line);
  background: linear-gradient(160deg, rgba(18, 59, 50, 0.92), rgba(10, 31, 25, 0.92));
  padding: 16px 16px 18px;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .duty-card:hover,
.page-about .duty-card:focus-within {
  border-color: var(--lime);
  transform: translateY(-3px);
}

.page-about .duty-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 6px 10px;
  margin-bottom: 8px;
}

.page-about .duty-name {
  margin: 0;
  font-size: 1rem;
  font-weight: 800;
  color: var(--fog);
}

.page-about .duty-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--sand);
  border: 1px solid var(--edge);
  padding: 2px 7px;
}

.page-about .duty-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 247, 242, 0.78);
}

/* ---------- rhythm ---------- */
.page-about .rhythm-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0 0 0 20px;
  border-left: var(--about-line);
  display: grid;
}

.page-about .rhythm-row {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 12px 0 14px;
  border-bottom: 1px dashed rgba(143, 166, 178, 0.3);
}

.page-about .rhythm-row:last-child {
  border-bottom: 0;
}

.page-about .rhythm-row::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 18px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--jade);
}

.page-about .rhythm-row--orange::before {
  background: var(--orange);
}

.page-about .rhythm-row--steel::before {
  background: var(--steel);
}

.page-about .rhythm-time {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .rhythm-row--orange .rhythm-time {
  color: var(--orange-soft);
}

.page-about .rhythm-row--steel .rhythm-time {
  color: var(--steel);
}

.page-about .rhythm-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 247, 242, 0.8);
}

.page-about .status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .status-item {
  flex: 1 1 220px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  padding: 12px 14px;
  border: var(--about-line);
  background: rgba(10, 31, 25, 0.65);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 247, 242, 0.78);
}

.page-about .status-item b {
  display: block;
  color: var(--fog);
  font-weight: 800;
  font-size: 13.5px;
}

.page-about .status-dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--steel);
}

.page-about .status-dot--lime {
  background: var(--lime);
}

.page-about .status-dot--orange {
  background: var(--orange);
}

.page-about .status-dot--fog {
  background: var(--fog);
}

.page-about .status-dot--sand {
  background: var(--sand);
}

/* ---------- stages ---------- */
.page-about .stage-list {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .stage-item {
  border: var(--about-line);
  background: rgba(18, 59, 50, 0.4);
  padding: 16px 18px 18px;
  display: grid;
  gap: 6px;
}

.page-about .stage-num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  font-weight: 800;
  line-height: 1;
  color: rgba(216, 179, 106, 0.55);
  letter-spacing: -0.02em;
}

.page-about .stage-name {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--fog);
}

.page-about .stage-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 247, 242, 0.78);
}

/* ---------- reach ---------- */
.page-about .reach-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
  margin-bottom: clamp(16px, 3vw, 24px);
}

.page-about .reach-card {
  border: var(--about-line);
  padding: 16px;
  background: linear-gradient(150deg, rgba(184, 255, 61, 0.1), rgba(10, 31, 25, 0.7));
}

.page-about .reach-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .reach-label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-contact {
  display: grid;
  gap: 14px;
  padding: var(--about-pad);
  border: var(--about-line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .about-contact-line {
  display: grid;
  gap: 4px;
}

.page-about .about-contact-key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.page-about .about-contact-val {
  font-size: 15px;
  color: var(--fog);
  word-break: break-word;
}

.page-about .about-contact-note {
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: var(--about-line);
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(244, 247, 242, 0.76);
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(16px, 3vw, 24px);
}

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

  .page-about .about-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 24px;
  }

  .page-about .about-contact-note {
    grid-column: 1 / -1;
  }

  .page-about .work-row {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 4px 16px;
    align-items: baseline;
  }

  .page-about .work-row .idx {
    grid-row: 1 / span 2;
  }

  .page-about .rhythm-row {
    grid-template-columns: 156px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
  }

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

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

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: 212px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    border-right: var(--about-line);
    padding-right: 20px;
  }

  .page-about .about-index-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 6px;
  }

  .page-about .about-index-link {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .duty-card {
    transition: none;
  }

  .page-about .duty-card:hover,
  .page-about .duty-card:focus-within {
    transform: none;
  }
}
<<<END>>>