.page-about {
  --about-line: rgba(16, 34, 46, 0.13);
  --about-line-light: rgba(245, 247, 250, 0.2);
  --about-shadow: 0 18px 40px -30px rgba(7, 42, 65, 0.8);
  background: var(--c-white);
  color: var(--c-ink);
  font-family: var(--font-body);
}

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

.page-about .breadcrumb {
  padding-block: clamp(0.9rem, 2.4vw, 1.4rem) 0;
  font-size: 13px;
}

.page-about .breadcrumb a {
  color: var(--c-mist);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--c-orange);
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: clamp(1.2rem, 3vw, 1.9rem);
}

.page-about .section-no {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-orange);
  padding: 0.15rem 0.6rem;
  border: 1px solid currentColor;
  border-radius: var(--r-pill);
}

.page-about .section-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--c-deep);
}

/* ---------- hero ---------- */
.page-about .about-hero {
  padding-block: clamp(1rem, 2.6vw, 1.6rem) clamp(2rem, 4.6vw, 3.2rem);
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.9rem;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-about .about-kicker::before {
  content: "";
  width: 34px;
  height: 3px;
  border-radius: 2px;
  background: var(--c-orange);
}

.page-about h1.display {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.9rem, 6vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--c-deep);
  margin: 0 0 1rem;
  max-width: 20ch;
}

.page-about .about-lead {
  max-width: 40ch;
  color: rgba(16, 34, 46, 0.85);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(1.4rem, 3.4vw, 2.2rem) 0 0;
  padding: clamp(1rem, 2.4vw, 1.4rem) 0 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.2rem;
}

.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .about-stats strong {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  color: var(--c-deep);
  line-height: 1.1;
}

.page-about .about-stats li:nth-child(2) strong { color: var(--c-blue); }
.page-about .about-stats li:nth-child(3) strong { color: var(--c-orange); }
.page-about .about-stats li:nth-child(4) strong { color: var(--c-green); }

.page-about .about-stats span {
  font-size: 13px;
  color: var(--c-mist);
}

/* ---------- origin ---------- */
.page-about .about-origin {
  background: var(--c-paper);
  padding-block: clamp(2.2rem, 5.5vw, 3.8rem);
  clip-path: polygon(0 0, 100% 16px, 100% 100%, 0 calc(100% - 16px));
}

.page-about .origin-grid {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.4rem);
}

.page-about .origin-copy p {
  margin: 0 0 1rem;
  line-height: 1.75;
  max-width: 38ch;
}

.page-about .origin-quote {
  margin: 1.4rem 0 0;
  padding: 0.9rem 0 0.9rem 1rem;
  border-left: 4px solid var(--c-orange);
  background: rgba(245, 247, 250, 0.6);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.page-about .origin-quote p {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  color: var(--c-deep);
  max-width: none;
}

.page-about .origin-quote cite {
  display: block;
  margin-top: 0.35rem;
  font-style: normal;
  font-size: 12px;
  color: var(--c-mist);
}

.page-about .origin-figure {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--about-shadow);
  background: var(--c-deep);
}

.page-about .origin-figure img {
  width: 100%;
  object-fit: cover;
}

.page-about .origin-figure figcaption,
.page-about .team-figure figcaption,
.page-about .about-band figcaption {
  font-size: 12px;
  line-height: 1.6;
  padding: 0.6rem 0.9rem;
  color: var(--c-mist);
  background: rgba(245, 247, 250, 0.92);
}

@media (min-width: 900px) {
  .page-about .origin-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .origin-copy {
    transform: translateY(-12px);
  }

  .page-about .origin-figure {
    transform: translateY(40px);
  }
}

/* ---------- timeline ---------- */
.page-about .about-timeline {
  padding-block: clamp(2.4rem, 5.5vw, 4rem);
  background: var(--c-white);
}

.page-about .timeline-grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.4rem);
}

.page-about .year-index ol {
  display: flex;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0 0 0.5rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .year-index li {
  flex: 0 0 auto;
}

.page-about .year-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-line);
  background: #fff;
  color: var(--c-deep);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .year-link .year-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
}

.page-about .year-link .year-word {
  font-size: 12px;
  color: var(--c-mist);
}

.page-about .year-link:hover,
.page-about .year-link:focus-visible {
  border-color: var(--c-orange);
  color: var(--c-orange);
  transform: translateY(-2px);
}

.page-about .year-link:hover .year-word,
.page-about .year-link:focus-visible .year-word {
  color: var(--c-orange);
}

.page-about .year-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(1.2rem, 3vw, 2rem);
}

.page-about .year-block {
  padding: 1.1rem 1.2rem 1.2rem;
  border-radius: var(--r-lg);
  border-left: 4px solid rgba(11, 60, 93, 0.16);
  background: rgba(241, 233, 218, 0.42);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .year-block:hover {
  border-left-color: var(--c-orange);
  background: rgba(241, 233, 218, 0.72);
}

.page-about .year-tag {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-blue);
}

.page-about .year-block h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.02rem, 2.4vw, 1.18rem);
  line-height: 1.45;
  color: var(--c-ink);
}

.page-about .year-block p:not(.year-tag) {
  margin: 0;
  line-height: 1.75;
  max-width: 38ch;
  color: rgba(16, 34, 46, 0.84);
}

.page-about .about-band {
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--about-shadow);
  background: var(--c-deep);
}

.page-about .about-band img {
  width: 100%;
  object-fit: cover;
}

@media (min-width: 980px) {
  .page-about .timeline-grid {
    grid-template-columns: 172px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .year-index {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
  }

  .page-about .year-index ol {
    display: block;
    overflow: visible;
    padding: 0 0 0 0.9rem;
    border-left: 2px solid var(--about-line);
  }

  .page-about .year-index li + li {
    margin-top: 0.55rem;
  }

  .page-about .year-link {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    padding: 0.3rem 0.5rem;
    border: 0;
    border-radius: var(--r-md);
    background: transparent;
    border-left: 3px solid transparent;
    margin-left: -1.05rem;
    padding-left: 0.85rem;
  }

  .page-about .year-link:hover,
  .page-about .year-link:focus-visible {
    border-left-color: var(--c-orange);
    background: rgba(242, 140, 40, 0.09);
    transform: none;
  }
}

/* ---------- flow ---------- */
.page-about .about-flow {
  background: linear-gradient(160deg, var(--c-deep) 0%, var(--c-night) 100%);
  color: var(--c-white);
  padding-block: clamp(2.4rem, 5.5vw, 4rem);
  clip-path: polygon(0 16px, 100% 0, 100% calc(100% - 16px), 0 100%);
}

.page-about .section-head--light .section-title {
  color: var(--c-white);
}

.page-about .section-head--light .section-no {
  color: var(--c-yellow);
}

.page-about .flow-lead {
  margin: 0 0 0.6rem;
  max-width: 40ch;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.84);
}

.page-about .flow-figure {
  margin: 0.6rem 0 0.4rem;
}

.page-about .flow-svg {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .flow-svg .flow-line {
  fill: none;
  stroke: rgba(245, 247, 250, 0.45);
  stroke-width: 2;
  stroke-dasharray: 7 8;
}

.page-about .flow-svg .node-ring {
  fill: rgba(245, 247, 250, 0.06);
  stroke: var(--c-orange);
  stroke-width: 2;
}

.page-about .flow-svg .flow-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  fill: var(--c-yellow);
}

.page-about .flow-svg .flow-label {
  font-family: var(--font-body);
  font-size: 21px;
  font-weight: 700;
  fill: var(--c-white);
}

.page-about .flow-spark--blue { fill: var(--c-blue); }
.page-about .flow-spark--green { fill: var(--c-green); }
.page-about .flow-spark--orange { fill: var(--c-orange); }

.page-about .flow-details {
  display: grid;
  gap: 0.7rem;
  margin-top: 1rem;
}

.page-about .flow-details details {
  border: 1px solid var(--about-line-light);
  background: rgba(245, 247, 250, 0.07);
  border-radius: var(--r-lg);
  padding: 0.85rem 1.05rem;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .flow-details details[open] {
  background: rgba(245, 247, 250, 0.13);
  border-color: rgba(242, 140, 40, 0.55);
}

.page-about .flow-details summary {
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1rem;
  color: var(--c-white);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  list-style: none;
}

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

.page-about .flow-details summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--c-orange);
  font-size: 1.1rem;
  line-height: 1;
}

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

.page-about .flow-details summary .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--c-yellow);
  border: 1px solid rgba(232, 194, 74, 0.6);
  border-radius: var(--r-pill);
  padding: 0.05rem 0.5rem;
}

.page-about .flow-details p {
  margin: 0.6rem 0 0.4rem;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.86);
}

.page-about .flow-details ul {
  margin: 0;
  padding-left: 1.05rem;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.72);
}

.page-about .flow-tail {
  margin: 1.2rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--about-line-light);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.86);
  max-width: 52ch;
}

.page-about .flow-tail::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  margin-right: 0.5rem;
  vertical-align: 1px;
}

@media (min-width: 820px) {
  .page-about .flow-details {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
}

/* ---------- team ---------- */
.page-about .about-team {
  padding-block: clamp(2.4rem, 5.5vw, 4rem);
  background: var(--c-paper);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.2rem);
}

.page-about .team-figure {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--c-deep);
  box-shadow: var(--about-shadow);
}

.page-about .team-figure img {
  width: 100%;
  object-fit: cover;
}

.page-about .team-cards {
  display: grid;
  gap: 0.8rem;
}

.page-about .team-card {
  background: #fff;
  border: 1px solid rgba(11, 60, 93, 0.09);
  border-radius: var(--r-lg);
  padding: 1rem 1.1rem 1.05rem;
  box-shadow: var(--shadow-1);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within,
.page-about .team-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
  border-color: rgba(242, 140, 40, 0.55);
}

.page-about .team-no {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

.page-about .team-card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--c-deep);
}

.page-about .team-line {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(16, 34, 46, 0.76);
}

.page-about .team-more {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0.7rem 0 0;
  border-top: 1px dashed var(--about-line);
  display: grid;
  gap: 0.3rem;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-mist);
}

.page-about .team-more li {
  position: relative;
  padding-left: 0.9rem;
}

.page-about .team-more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-blue);
}

@media (min-width: 760px) {
  .page-about .team-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .team-more {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s var(--ease), opacity 0.22s var(--ease), margin 0.3s var(--ease), padding 0.3s var(--ease);
  }

  .page-about .team-card:hover .team-more,
  .page-about .team-card:focus-within .team-more {
    max-height: 220px;
    margin-top: 0.7rem;
    padding-top: 0.7rem;
    border-top-color: var(--about-line);
    opacity: 1;
  }
}

@media (min-width: 1040px) {
  .page-about .team-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .team-figure {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
  }
}

/* ---------- promise ---------- */
.page-about .about-promise {
  padding-block: clamp(2.4rem, 5.5vw, 4rem);
  background: var(--c-white);
}

.page-about .promise-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .promise-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1.1rem 0.2rem 1.1rem 0.7rem;
  border-bottom: 1px solid var(--about-line);
  border-left: 3px solid transparent;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .promise-list li:hover {
  border-left-color: var(--c-orange);
  background: rgba(241, 233, 218, 0.42);
}

.page-about .promise-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-orange);
  padding-top: 0.2rem;
}

.page-about .promise-list h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1rem, 2.2vw, 1.12rem);
  color: var(--c-deep);
  line-height: 1.45;
}

.page-about .promise-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  max-width: 46ch;
  color: rgba(16, 34, 46, 0.78);
}

/* ---------- next ---------- */
.page-about .about-next {
  padding-block: clamp(2.4rem, 5.5vw, 4rem) clamp(2.6rem, 6vw, 4.4rem);
  background: linear-gradient(180deg, rgba(241, 233, 218, 0.65), var(--c-white) 78%);
  clip-path: polygon(0 16px, 100% 0, 100% 100%, 0 100%);
}

.page-about .next-head {
  max-width: 46ch;
  margin-bottom: clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .next-head .section-title {
  margin-bottom: 0.5rem;
}

.page-about .next-head p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .next-grid {
  display: grid;
  gap: 0.75rem;
}

.page-about .next-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.05rem 2.6rem 1.1rem 1.15rem;
  border-radius: var(--r-lg);
  background: #fff;
  border: 1px solid rgba(11, 60, 93, 0.1);
  box-shadow: var(--shadow-1);
  color: var(--c-ink);
  text-decoration: none;
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
  border-color: rgba(242, 140, 40, 0.5);
}

.page-about .next-card--accent {
  background: var(--c-deep);
  border-color: var(--c-deep);
  color: var(--c-white);
}

.page-about .next-card--accent .next-kicker {
  color: var(--c-yellow);
}

.page-about .next-card--accent strong {
  color: var(--c-white);
}

.page-about .next-card--ghost {
  background: rgba(245, 247, 250, 0.55);
}

.page-about .next-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

.page-about .next-card strong {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--c-deep);
}

.page-about .next-arrow {
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  color: var(--c-orange);
  transition: transform 0.22s var(--ease);
}

.page-about .next-card:hover .next-arrow,
.page-about .next-card:focus-visible .next-arrow {
  transform: translate(3px, -50%);
}

@media (min-width: 700px) {
  .page-about .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-about .origin-copy,
  .page-about .origin-figure,
  .page-about .team-card:hover,
  .page-about .next-card:hover {
    transform: none;
  }
}