.page-about {
  --story-line: rgba(26, 24, 23, 0.28);
  --story-muted: rgba(26, 24, 23, 0.68);
  --story-deep-text: rgba(245, 239, 224, 0.94);
  --story-deep-sub: rgba(245, 239, 224, 0.6);
}

.page-about .story-hero {
  background:
    radial-gradient(circle at 78% 12%, rgba(255, 107, 0, 0.22) 0%, transparent 38%),
    linear-gradient(140deg, #1A1817 0%, #2A221E 72%, #342A23 100%);
  color: var(--bg);
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6vw, 68px) 0 48px;
}

.page-about .story-hero__watermark {
  position: absolute;
  right: 2%;
  bottom: -0.18em;
  font-family: var(--font-heading);
  font-size: clamp(108px, 22vw, 280px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(245, 239, 224, 0.12);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
}

.page-about .story-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .story-hero__breadcrumbs {
  margin-bottom: 28px;
  color: rgba(245, 239, 224, 0.55);
  font-size: 0.85rem;
}

.page-about .story-hero__breadcrumbs a {
  color: rgba(245, 239, 224, 0.75);
  text-decoration: none;
}

.page-about .story-hero__breadcrumbs a:hover {
  color: var(--green);
}

.page-about .story-hero__grid {
  display: grid;
  gap: 36px;
}

.page-about .story-hero__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: rgba(245, 239, 224, 0.66);
}

.page-about .story-hero__kicker-text {
  margin-top: 2px;
}

.page-about .story-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5.6vw, 3.8rem);
  line-height: 1.04;
  letter-spacing: 0.02em;
  margin: 0 0 18px;
  max-width: 760px;
}

.page-about .story-hero__title-accent {
  display: block;
  color: var(--orange);
}

.page-about .story-hero__lead {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(245, 239, 224, 0.85);
  max-width: 640px;
  margin: 0 0 12px;
}

.page-about .story-hero__footnote {
  font-family: var(--font-data);
  font-size: 0.82rem;
  color: var(--green);
  margin: 0 0 36px;
  padding-left: 14px;
  border-left: 3px solid var(--green);
}

.page-about .story-hero__slash {
  width: 120px;
  height: 120px;
  position: absolute;
  right: 0;
  top: 0;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .story-hero__preview {
  border-top: 1px solid rgba(245, 239, 224, 0.24);
  border-bottom: 1px solid rgba(245, 239, 224, 0.24);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.page-about .story-hero__preview-title {
  grid-column: 1 / -1;
  margin: 16px 0 0;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  color: rgba(245, 239, 224, 0.45);
}

.page-about .story-hero__preview-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 4px;
  text-decoration: none;
  color: var(--bg);
  border-top: 1px solid rgba(245, 239, 224, 0.14);
  position: relative;
}

.page-about .story-hero__preview-item:hover {
  color: var(--orange);
}

.page-about .story-hero__preview-index {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--orange);
}

.page-about .story-hero__preview-label {
  font-size: 0.95rem;
  font-weight: 700;
}

.page-about .story-chapter {
  padding: clamp(52px, 8vw, 92px) 0;
}

.page-about .story-chapter__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-top: 2px solid var(--ink);
  padding-top: 14px;
  margin-bottom: clamp(32px, 5vw, 52px);
  position: relative;
}

.page-about .story-chapter__head .section-head {
  position: relative;
  padding-left: 8px;
}

.page-about .story-chapter__head .section-index {
  position: absolute;
  top: -44px;
  left: -2px;
  font-family: var(--font-heading);
  font-size: clamp(5rem, 10vw, 8rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px var(--ink);
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
  letter-spacing: -0.02em;
}

.page-about .story-chapter__head .section-kicker {
  position: relative;
  z-index: 1;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--orange);
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 8px;
}

.page-about .story-chapter__head .section-title {
  position: relative;
  z-index: 1;
  font-family: var(--font-heading);
  font-size: clamp(1.55rem, 3.4vw, 2.4rem);
  line-height: 1.22;
  letter-spacing: 0.02em;
  margin: 0;
  max-width: 860px;
}

.page-about .story-chapter__note {
  writing-mode: vertical-rl;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--warm-gray);
  margin-top: 6px;
  flex-shrink: 0;
  white-space: nowrap;
}

.page-about .story-origin {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .story-origin__text {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .story-origin__text p {
  margin: 0 0 16px;
}

.page-about .story-origin__text a,
.page-about .timeline__detail a,
.page-about .story-team__content a {
  color: var(--orange);
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
  font-weight: 700;
}

.page-about .story-origin__text a:hover,
.page-about .timeline__detail a:hover,
.page-about .story-team__content a:hover {
  color: var(--ink);
}

.page-about .story-origin__keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .story-origin__media {
  margin: 0;
}

.page-about .story-origin__media img,
.page-about .story-team__media img,
.page-about .timeline-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .story-origin__media figcaption,
.page-about .story-team__media figcaption,
.page-about .timeline-media figcaption {
  font-size: 0.8rem;
  color: var(--story-muted);
  margin-top: 10px;
  line-height: 1.6;
  border-left: 2px solid var(--orange);
  padding-left: 10px;
}

.page-about .story-stats {
  margin-top: 40px;
}

.page-about .story-stats .stat-card {
  border-radius: 0;
}

.page-about .story-chapter--timeline {
  background: linear-gradient(180deg, rgba(26, 24, 23, 0.02) 0%, rgba(26, 24, 23, 0.06) 100%);
}

.page-about .timeline {
  display: grid;
  gap: 18px;
  margin-top: 8px;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
}

.page-about .timeline__track {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.page-about .timeline__track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: -18px;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--ink) 0%, var(--warm-gray) 78%, transparent 100%);
  opacity: 0.28;
}

.page-about .timeline__item:last-child .timeline__track::before {
  display: none;
}

.page-about .timeline__dot {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--bg);
  margin-top: 18px;
  position: relative;
  z-index: 1;
  box-shadow: 0 2px 0 rgba(26, 24, 23, 0.18);
}

.page-about .timeline__dot--live {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.22);
}

.page-about .timeline__pulse {
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 2px solid var(--green);
  animation: story-pulse 2s ease-out infinite;
}

@keyframes story-pulse {
  0% { transform: scale(0.6); opacity: 0.9; }
  100% { transform: scale(1.8); opacity: 0; }
}

.page-about .timeline__card {
  padding: 0;
  border-radius: 0;
  overflow: hidden;
  color: var(--story-deep-text);
  border-left: 3px solid transparent;
  transition: border-color 0.3s ease;
}

.page-about .timeline__card--current {
  border-left-color: var(--green);
}

.page-about .timeline__item.is-open .timeline__card {
  border-left-color: var(--orange);
}

.page-about .timeline__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  background: transparent;
  border: 0;
  padding: 18px 16px;
  cursor: pointer;
  text-align: left;
  color: inherit;
  font-family: var(--font-body);
  appearance: none;
}

.page-about .timeline__trigger:hover {
  background: rgba(255, 255, 255, 0.06);
}

.page-about .timeline__version {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  line-height: 1;
  color: var(--orange);
  letter-spacing: 0.04em;
  min-width: 58px;
}

.page-about .timeline__card--current .timeline__version {
  color: var(--green);
}

.page-about .timeline__year {
  font-family: var(--font-data);
  font-size: 0.82rem;
  color: rgba(245, 239, 224, 0.7);
  margin-right: auto;
}

.page-about .timeline__trigger .tag--live {
  flex-shrink: 0;
}

.page-about .toggle-line {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
  display: inline-block;
}

.page-about .toggle-line::before,
.page-about .toggle-line::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg);
  transition: transform 0.25s ease;
}

.page-about .toggle-line::before {
  width: 12px;
  height: 2px;
}

.page-about .toggle-line::after {
  width: 2px;
  height: 12px;
}

.page-about .timeline__item.is-open .toggle-line::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-about .timeline__detail {
  padding: 0 16px 18px;
  border-top: 1px solid rgba(245, 239, 224, 0.18);
}

.page-about .timeline__detail p {
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(245, 239, 224, 0.88);
  margin: 14px 0 0;
}

.page-about .timeline-media {
  margin: 36px 0 0;
}

.page-about .story-chapter--team {
  background:
    radial-gradient(circle at 12% 80%, rgba(255, 107, 0, 0.14) 0%, transparent 34%),
    linear-gradient(145deg, #1A1817 0%, #26201C 100%);
  color: var(--bg);
}

.page-about .story-chapter--team .story-chapter__head {
  border-top-color: rgba(245, 239, 224, 0.42);
}

.page-about .story-chapter--team .section-index {
  -webkit-text-stroke-color: rgba(245, 239, 224, 0.6);
}

.page-about .story-chapter--team .section-kicker {
  color: var(--green);
}

.page-about .story-chapter--team .section-title {
  color: var(--bg);
}

.page-about .story-chapter--team .story-chapter__note {
  color: rgba(245, 239, 224, 0.48);
}

.page-about .story-team {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-about .story-team__media {
  margin: 0;
}

.page-about .story-team__media figcaption {
  color: rgba(245, 239, 224, 0.5);
  border-left-color: var(--green);
}

.page-about .story-team__content {
  font-size: 0.97rem;
  line-height: 1.85;
  color: rgba(245, 239, 224, 0.88);
}

.page-about .story-team__content p {
  margin: 0 0 16px;
}

.page-about .story-team__content a {
  color: var(--green);
  text-decoration-color: var(--green);
  text-underline-offset: 3px;
  font-weight: 700;
}

.page-about .story-team__content a:hover {
  color: var(--orange);
}

.page-about .story-ecosystem {
  margin-top: 28px;
  border-top: 1px solid rgba(245, 239, 224, 0.3);
  padding-top: 20px;
}

.page-about .story-ecosystem__title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  margin: 0 0 14px;
  color: var(--bg);
}

.page-about .story-ecosystem__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .story-ecosystem__item {
  display: flex;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(245, 239, 224, 0.14);
  font-size: 0.92rem;
  line-height: 1.65;
}

.page-about .story-ecosystem__num {
  font-family: var(--font-data);
  color: var(--orange);
  font-weight: 700;
  flex-shrink: 0;
}

.page-about .story-ecosystem__text {
  color: rgba(245, 239, 224, 0.9);
}

.page-about .story-credential-grid {
  display: grid;
  gap: 22px;
}

.page-about .story-card {
  perspective: 1200px;
  outline: none;
}

.page-about .story-card__inner {
  display: grid;
  grid-template-areas: "cell";
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.2, 0.78, 0.2, 1);
}

.page-about .story-card__face {
  grid-area: cell;
  min-height: 250px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 0;
}

.page-about .story-card__front h3 {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  line-height: 1.3;
  letter-spacing: 0.04em;
  margin: 0;
}

.page-about .story-card__front p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--story-muted);
  margin: 0;
}

.page-about .story-card__icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange);
  color: var(--bg);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.page-about .story-card__back {
  transform: rotateY(180deg);
  background: var(--ink);
  color: var(--bg);
}

.page-about .story-card__back p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(245, 239, 224, 0.86);
  margin: 0;
}

.page-about .story-card__code {
  font-family: var(--font-data);
  color: var(--green);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
}

.page-about .story-card:hover .story-card__inner,
.page-about .story-card:focus .story-card__inner,
.page-about .story-card:focus-within .story-card__inner {
  transform: rotateY(180deg);
}

.page-about .story-credential-note {
  margin-top: 32px;
  max-width: 780px;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--story-muted);
  border-left: 3px solid var(--warm-gray);
  padding-left: 16px;
}

@media (min-width: 768px) {
  .page-about .story-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: end;
    gap: 48px;
  }

  .page-about .story-hero__preview {
    grid-template-columns: 1fr;
    border-top: none;
    border-bottom: none;
    border-left: 1px solid rgba(245, 239, 224, 0.24);
    padding-left: 20px;
  }

  .page-about .story-hero__preview-title {
    grid-column: auto;
    margin: 0 0 6px;
  }

  .page-about .story-hero__preview-item {
    border-top: none;
    padding: 11px 4px;
  }

  .page-about .story-origin {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }

  .page-about .story-team {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
  }

  .page-about .story-credential-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
  }
}

@media (min-width: 1024px) {
  .page-about .story-hero {
    padding: 72px 0 64px;
  }

  .page-about .story-hero__title {
    font-size: clamp(3rem, 5vw, 4.4rem);
  }

  .page-about .story-hero__lead {
    font-size: 1.05rem;
  }

  .page-about .story-chapter__note {
    font-size: 0.78rem;
  }

  .page-about .timeline {
    max-width: 900px;
  }

  .page-about .timeline__item {
    grid-template-columns: 48px 1fr;
    gap: 18px;
  }

  .page-about .timeline__trigger {
    padding: 20px 22px;
  }

  .page-about .timeline__detail {
    padding: 0 22px 22px;
  }

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

  .page-about .story-origin__text {
    font-size: 1.05rem;
  }

  .page-about .story-ecosystem__item {
    font-size: 0.95rem;
  }
}