.page-about {
  --about-shift: 0px;
  --about-line: 1px solid var(--line-soft);
  --about-line-lit: 1px solid var(--c-cyan);
}

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

.page-about .section {
  padding-block: clamp(52px, 8vw, 108px);
}

.page-about .breadcrumb {
  padding-inline: var(--gutter);
  padding-top: 18px;
}

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(40px, 7vw, 88px) clamp(44px, 7vw, 96px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -22%;
  width: min(760px, 118%);
  height: 118%;
  background:
    linear-gradient(158deg, rgba(34, 227, 210, 0.2), rgba(34, 227, 210, 0) 62%),
    linear-gradient(18deg, rgba(139, 92, 246, 0.26), rgba(139, 92, 246, 0) 58%);
  clip-path: polygon(22% 0, 100% 0, 78% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -30%;
  width: 60%;
  height: 70%;
  background: radial-gradient(closest-side, rgba(233, 180, 92, 0.14), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 18px;
  max-width: 760px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 9vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--c-paper);
  margin: 0;
}

.page-about .about-hero__lead {
  max-width: 44ch;
  margin: 0;
  color: var(--c-text);
  font-size: var(--fs-body);
  line-height: 1.85;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 01 belief ---------- */
.page-about .about-belief__media {
  margin: 0 0 clamp(28px, 5vw, 52px);
  border: var(--about-line);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.page-about .about-belief__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

.page-about .about-belief__body {
  display: grid;
  gap: 14px;
  max-width: 62ch;
  margin-left: 0;
}

.page-about .about-belief__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--c-paper);
  margin: 0;
}

.page-about .about-belief__text {
  margin: 0;
  color: var(--c-text);
  line-height: 1.9;
}

.page-about .about-quote {
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid rgba(26, 23, 18, 0.16);
  max-width: 100%;
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.4vw, 30px);
  line-height: 1.5;
  color: var(--c-paper-ink);
  letter-spacing: -0.01em;
}

.page-about .about-quote__note {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(26, 23, 18, 0.6);
}

/* ---------- 02 lines ---------- */
.page-about .about-lines__head {
  display: grid;
  gap: 12px;
  max-width: 58ch;
  margin-bottom: clamp(26px, 5vw, 46px);
}

.page-about .about-lines__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--c-paper);
  margin: 0;
}

.page-about .about-lines__intro {
  margin: 0;
  color: var(--c-text);
  line-height: 1.9;
}

.page-about .about-lines__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-line {
  position: relative;
  padding: 26px 22px 28px;
  background: linear-gradient(180deg, rgba(36, 28, 51, 0.72), rgba(18, 23, 34, 0.86));
  border: var(--about-line);
  box-shadow: var(--shadow-soft);
  transition: border-color 0.32s var(--ease), box-shadow 0.32s var(--ease), transform 0.32s var(--ease);
}

.page-about .about-lines__grid:hover .about-line {
  border-color: rgba(34, 227, 210, 0.3);
}

.page-about .about-lines__grid .about-line:hover,
.page-about .about-lines__grid .about-line:focus-within {
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 1px rgba(34, 227, 210, 0.24), var(--shadow-soft);
}

.page-about .about-line__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--c-cyan);
  margin-bottom: 12px;
}

.page-about .about-line__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--c-paper);
  margin: 0 0 10px;
}

.page-about .about-line__text {
  margin: 0 0 16px;
  color: var(--c-text);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-line__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}

.page-about .about-line__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-text-dim);
}

.page-about .about-line__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 1px;
  background: var(--c-gold);
}

.page-about .about-line__list a {
  color: var(--c-cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 233, 222, 0.4);
}

.page-about .about-line__list a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* ---------- 03 scale ---------- */
.page-about .about-scale__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-scale__figure-wrap {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-scale__figure {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  line-height: 0.84;
  color: var(--c-gold);
}

.page-about .about-scale__num {
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: clamp(72px, 20vw, 120px);
  letter-spacing: -0.04em;
}

.page-about .about-scale__unit {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 5vw, 34px);
}

.page-about .about-scale__caption {
  margin: 0;
  max-width: 34ch;
  color: var(--c-text-dim);
  font-size: 14.5px;
  line-height: 1.8;
}

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

.page-about .about-scale__item {
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-scale__item:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .about-scale__item-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-about .about-scale__item-no {
  color: var(--c-cyan);
  font-size: 20px;
}

.page-about .about-scale__item p {
  margin: 0;
  color: var(--c-text);
  font-size: 15.5px;
  line-height: 1.85;
}

/* ---------- 04 team ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 5vw, 48px);
}

.page-about .about-team__body {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-team__body h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--c-paper);
  margin: 0;
}

.page-about .about-team__intro {
  margin: 0;
  max-width: 52ch;
  color: var(--c-text);
  line-height: 1.9;
}

.page-about .about-team__roles {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  padding: 16px 18px;
  border-left: 1px solid var(--line);
  background: rgba(11, 13, 18, 0.42);
}

.page-about .about-role__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--c-cyan-soft);
  letter-spacing: -0.005em;
}

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

.page-about .about-team__foot {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-about .about-team__foot a {
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(233, 180, 92, 0.42);
}

.page-about .about-team__foot a:hover {
  color: var(--c-paper);
  border-bottom-color: var(--c-paper);
}

.page-about .about-team__media {
  margin: 0;
  border: var(--about-line);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  align-self: start;
}

.page-about .about-team__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 05 stages ---------- */
.page-about .about-stages__head {
  display: grid;
  gap: 12px;
  max-width: 58ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-stages__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--c-paper);
  margin: 0;
}

.page-about .about-stages__intro {
  margin: 0;
  color: var(--c-text);
  line-height: 1.9;
}

.page-about .about-stages__media {
  margin: 0 0 clamp(26px, 4vw, 44px);
  border: var(--about-line);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-about .about-stages__media img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 0;
  list-style: none;
  display: grid;
  gap: 24px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cyan), rgba(34, 227, 210, 0.08));
}

.page-about .about-stage {
  position: relative;
  display: grid;
  gap: 12px;
  padding-left: 44px;
}

.page-about .about-stage__main {
  display: grid;
  gap: 8px;
}

.page-about .about-stage__no {
  position: absolute;
  left: 0;
  top: 2px;
  width: 32px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--c-obsidian);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
  border: 1px solid var(--line);
}

.page-about .about-stage__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 3.4vw, 24px);
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-about .about-stage__text {
  margin: 0;
  color: var(--c-text);
  font-size: 15.5px;
  line-height: 1.9;
  max-width: 56ch;
}

.page-about .about-stage__more {
  border: var(--about-line);
  border-left: 2px solid var(--c-violet);
  background: rgba(36, 28, 51, 0.6);
  padding: 12px 14px;
}

.page-about .about-stage__more summary {
  cursor: pointer;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--c-cyan-soft);
  list-style: none;
}

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

.page-about .about-stage__more summary::after {
  content: " ＋";
  color: var(--c-violet);
}

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

.page-about .about-stage__more .fold__body p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-text-dim);
}

/* ---------- 06 reasons ---------- */
.page-about .about-reasons {
  color: var(--c-paper-ink);
}

.page-about .about-reasons__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-reasons__head .eyebrow {
  color: rgba(26, 23, 18, 0.62);
}

.page-about .about-reasons__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--c-paper-ink);
  margin: 0;
}

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

.page-about .about-reason {
  padding: 22px 20px;
  border: 1px solid rgba(26, 23, 18, 0.22);
  background: rgba(255, 255, 255, 0.28);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-reason:hover {
  border-color: rgba(26, 23, 18, 0.5);
  background: rgba(255, 255, 255, 0.46);
}

.page-about .about-reason__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: #8a5a1d;
  margin-bottom: 10px;
}

.page-about .about-reason__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--c-paper-ink);
}

.page-about .about-reason__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(26, 23, 18, 0.78);
}

.page-about .about-cta {
  margin-top: clamp(28px, 5vw, 48px);
  padding-top: clamp(22px, 4vw, 32px);
  border-top: 1px solid rgba(26, 23, 18, 0.24);
  display: grid;
  gap: 18px;
}

.page-about .about-cta__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 3.4vw, 25px);
  line-height: 1.35;
  color: var(--c-paper-ink);
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(26, 23, 18, 0.72);
}

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

/* ---------- tablet ---------- */
@media (min-width: 760px) {
  .page-about .about-reasons__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .about-scale__item {
    padding-top: 18px;
  }

  .page-about .about-scale__item:first-child {
    padding-top: 18px;
    border-top: 1px solid var(--line-soft);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* ---------- desktop ---------- */
@media (min-width: 960px) {
  .page-about {
    --about-shift: 48px;
  }

  .page-about .about-belief__body {
    margin-left: calc(100% / 12);
    max-width: 56ch;
  }

  .page-about .about-quote {
    width: min(720px, 100%);
    margin-left: auto;
  }

  .page-about .about-lines__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.18fr) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-about .about-line:nth-child(2) {
    transform: translateY(var(--about-shift));
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-scale__figure-wrap {
    position: sticky;
    top: 96px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-team__media {
    margin-top: 48px;
  }

  .page-about .about-timeline::before {
    left: 21px;
  }

  .page-about .about-stage {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 32px;
    padding-left: 68px;
    align-items: start;
  }

  .page-about .about-stage__no {
    left: 4px;
    width: 36px;
    height: 24px;
  }

  .page-about .about-stage__more {
    margin-top: 6px;
  }

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

  .page-about .about-reason:nth-child(even) {
    transform: translateY(24px);
  }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-reason,
  .page-about .about-line:nth-child(2),
  .page-about .about-reason:nth-child(even) {
    transform: none;
    transition: opacity 0.2s linear;
  }
}