.page-about {
  --about-rule: 1px solid var(--line);
  --about-block: clamp(44px, 7vw, 88px);
  overflow-x: clip;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-topbar {
  padding-top: clamp(14px, 3vw, 26px);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(10px, 2vw, 20px);
  padding: clamp(26px, 5vw, 60px) 0 clamp(40px, 7vw, 84px);
  background: linear-gradient(158deg, var(--deep-800) 0%, var(--ink-900) 62%, var(--ink-900) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 34px));
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -26%;
  width: min(64vw, 720px);
  height: min(64vw, 720px);
  border-radius: 50%;
  background: radial-gradient(circle at 38% 38%, rgba(45, 226, 230, 0.18), transparent 64%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.page-about .about-hero .display-title {
  margin: clamp(16px, 3vw, 24px) 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(34px, 7vw, 74px);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-lede {
  margin: clamp(16px, 3vw, 22px) 0 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-hero-note {
  margin: 14px 0 0;
  max-width: 54ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  border-left: 2px solid var(--coral-500);
  padding-left: 12px;
}

.page-about .stat-strip {
  list-style: none;
  margin: clamp(26px, 5vw, 44px) 0 0;
  padding: clamp(20px, 4vw, 30px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  border-top: var(--about-rule);
}

.page-about .stat-cell {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan-400);
}

.page-about .stat-cell:nth-child(2n) .stat-num {
  color: var(--coral-500);
}

.page-about .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ---------- Body layout ---------- */
.page-about .about-body {
  padding-top: var(--about-block);
}

.page-about .about-index {
  display: none;
}

.page-about .about-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--tide-300);
}

.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: var(--about-rule);
}

.page-about .about-index-link {
  display: flex;
  gap: 8px;
  margin-left: -1px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  font-size: 13px;
  line-height: 1.45;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: var(--text);
  border-left-color: var(--coral-500);
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  color: var(--cyan-400);
}

/* ---------- Chapter ---------- */
.page-about .about-chapter + .about-chapter {
  margin-top: clamp(44px, 7vw, 88px);
  padding-top: clamp(26px, 4vw, 42px);
  border-top: var(--about-rule);
}

.page-about .about-chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: clamp(16px, 3vw, 22px);
}

.page-about .about-chapter-num {
  color: var(--coral-500);
}

.page-about .about-chapter-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.4vw, 44px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .about-intro {
  margin: 0 0 clamp(20px, 3vw, 26px);
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

/* ---------- Figures ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0 0 clamp(20px, 3vw, 26px);
  overflow: hidden;
  border: var(--about-rule);
  background: var(--deep-800);
}

.page-about .about-figure::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  width: 52px;
  height: 3px;
  background: var(--coral-500);
}

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

.page-about .about-figure .figure-caption {
  margin: 0;
  padding: 10px 14px;
  border-top: var(--about-rule);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-muted);
}

.page-about .about-stage-figure {
  margin: clamp(24px, 4vw, 34px) 0 0;
  height: 280px;
  overflow: hidden;
  border: var(--about-rule);
  background: var(--deep-800);
}

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

/* ---------- Content lines ---------- */
.page-about .line-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .line-row {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: var(--about-rule);
}

.page-about .line-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-about .line-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 10px;
  background: var(--cyan-400);
  transform: rotate(45deg);
  vertical-align: middle;
}

.page-about .line-row:nth-child(2) .line-title::before {
  background: var(--coral-500);
}

.page-about .line-row:nth-child(4) .line-title::before {
  background: var(--violet-500);
}

.page-about .line-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- Team ---------- */
.page-about .team-stack {
  display: grid;
  gap: 0;
  margin-top: 6px;
}

.page-about .team-panel {
  position: relative;
  margin-top: -1px;
  padding: 18px 20px 18px 24px;
  background: var(--bg-panel);
  border: var(--about-rule);
}

.page-about .team-panel:first-child {
  margin-top: 0;
}

.page-about .team-panel::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--cyan-400);
}

.page-about .team-panel:nth-child(2)::before {
  background: var(--coral-500);
}

.page-about .team-panel:nth-child(3)::before {
  background: var(--violet-500);
}

.page-about .team-panel:nth-child(4)::before {
  background: var(--amber-500);
}

.page-about .team-panel:nth-child(5)::before {
  background: var(--tide-300);
}

.page-about .team-name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-about .team-role {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-muted);
}

/* ---------- Details ---------- */
.page-about .about-details {
  margin-top: clamp(20px, 3vw, 26px);
  border: var(--about-rule);
  border-left: 3px solid var(--coral-500);
  background: rgba(11, 47, 56, 0.6);
}

.page-about .about-details-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-details-summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--coral-500);
}

.page-about .about-details[open] .about-details-summary::after {
  content: "−";
}

.page-about .about-details-body {
  padding: 16px 18px 18px;
  border-top: var(--about-rule);
}

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-about .step-num {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-900);
  background: var(--cyan-400);
}

/* ---------- Stages ---------- */
.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 2px solid var(--line-strong);
  display: grid;
  gap: clamp(22px, 3vw, 30px);
}

.page-about .stage-item {
  position: relative;
}

.page-about .stage-item::before {
  content: "";
  position: absolute;
  top: 7px;
  left: -28px;
  width: 11px;
  height: 11px;
  background: var(--ink-900);
  border: 2px solid var(--cyan-400);
  transform: rotate(45deg);
}

.page-about .stage-item:nth-child(4)::before {
  border-color: var(--coral-500);
}

.page-about .stage-item:nth-child(5)::before {
  border-color: var(--violet-500);
}

.page-about .stage-tag {
  display: inline-block;
  margin-bottom: 8px;
}

.page-about .stage-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-about .stage-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- Partners ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 3vw, 24px);
  border: var(--about-rule);
  background: var(--line);
}

.page-about .partner-item {
  padding: 20px 18px;
  background: var(--bg-panel);
}

.page-about .partner-name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-about .partner-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-muted);
}

.page-about .partner-note {
  margin: clamp(18px, 3vw, 24px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- Rhythm ---------- */
.page-about .rhythm-list {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: var(--about-rule);
}

.page-about .rhythm-row {
  display: grid;
  gap: 4px;
  padding: 18px 0;
  border-bottom: var(--about-rule);
}

.page-about .rhythm-row dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}

.page-about .rhythm-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- Inline links ---------- */
.page-about .about-flow a:not(.btn) {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-flow a:not(.btn):hover {
  color: var(--coral-300);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  margin-top: clamp(48px, 8vw, 96px);
  padding: clamp(28px, 5vw, 52px) clamp(22px, 4vw, 46px) clamp(34px, 5vw, 58px);
  border: var(--about-rule);
  background: linear-gradient(135deg, var(--deep-800) 0%, var(--ink-900) 72%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 74, 0.24), transparent 70%);
  pointer-events: none;
}

.page-about .about-cta-tag {
  position: relative;
  display: inline-block;
  margin: 0;
  color: var(--coral-500);
}

.page-about .about-cta h2 {
  position: relative;
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .about-cta p {
  position: relative;
  margin: 0 0 12px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-about .about-cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(18px, 3vw, 24px) 0 18px;
}

.page-about .about-cta-links {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- Media queries ---------- */
@media (min-width: 560px) {
  .page-about .stat-strip {
    gap: 24px 28px;
  }

  .page-about .rhythm-row {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }
}

@media (min-width: 720px) {
  .page-about .line-row {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 0 24px;
    align-items: start;
  }

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

  .page-about .about-stage-figure {
    height: 380px;
  }

  .page-about .about-prose p {
    font-size: 17px;
  }
}

@media (min-width: 760px) {
  .page-about .stat-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .team-panel:nth-child(even) {
    margin-left: 32px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-chapter-title {
    line-height: 1.06;
  }
}

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