.page-about {
  --ab-clip-cut: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  --ab-clip-sm: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  background: var(--panda-white);
  color: var(--panda-black);
}

.page-about .ab-crumb-wrap {
  background: var(--panda-white);
  border-bottom: 1px solid #E5E5E5;
  padding: 14px 0;
}

.page-about .ab-hero {
  background: var(--panda-black);
  color: var(--panda-white);
  padding: 48px 0 72px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-hero__content .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--panda-orange);
  text-transform: uppercase;
}

.page-about .ab-kicker::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 4px;
  background: var(--panda-orange);
  transform: skewX(-20deg);
}

.page-about .ab-hero h1 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.page-about .ab-hero__lead {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .ab-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 28px;
}

.page-about .ab-hero__stat {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--panda-orange);
  background: rgba(255, 107, 0, 0.12);
  border: 1px solid rgba(255, 107, 0, 0.5);
  padding: 8px 12px;
  clip-path: var(--ab-clip-sm);
}

.page-about .ab-hero__figure {
  margin: 0;
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: var(--ab-clip-cut);
}

.page-about .ab-hero__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  font-family: var(--font-mono);
}

.page-about .ab-index {
  background: var(--panda-white);
  border-bottom: 2px solid var(--panda-black);
  padding: 14px 0;
}

.page-about .ab-index .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
}

.page-about .ab-index__label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--panda-orange);
}

.page-about .ab-index a {
  color: var(--panda-black);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}

.page-about .ab-index a:hover {
  border-bottom-color: var(--panda-orange);
  color: var(--panda-orange);
}

.page-about .ab-section {
  padding: 48px 0;
}

.page-about .ab-story {
  background: var(--panda-light-green);
}

.page-about .ab-milestone {
  background: var(--panda-white);
}

.page-about .ab-system {
  background: var(--panda-carbon);
}

.page-about .ab-data {
  background: var(--panda-light-orange);
}

.page-about .ab-team {
  background: var(--panda-white);
}

.page-about .ab-story__grid {
  display: grid;
  gap: 28px;
  margin-top: 32px;
}

.page-about .ab-story__content p {
  margin: 0 0 16px;
  color: var(--panda-cloud);
  line-height: 1.8;
}

.page-about .ab-story__points {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .ab-story__points li {
  position: relative;
  padding: 16px 16px 16px 48px;
  background: rgba(255, 255, 255, 0.72);
  clip-path: var(--ab-clip-sm);
  line-height: 1.7;
  color: var(--panda-cloud);
  font-size: 15px;
}

.page-about .ab-story__points strong {
  color: var(--panda-black);
}

.page-about .ab-story__points li::before {
  content: "熊";
  position: absolute;
  left: 12px;
  top: 16px;
  width: 22px;
  height: 22px;
  background: var(--panda-black);
  color: var(--panda-white);
  font-size: 12px;
  font-weight: 900;
  display: grid;
  place-items: center;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 0 100%);
}

.page-about .ab-story__card {
  border: 2px solid var(--panda-black);
  background: rgba(255, 255, 255, 0.78);
  clip-path: var(--ab-clip-cut);
  padding: 24px;
}

.page-about .ab-story__card-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--panda-orange);
}

.page-about .ab-story__card h3 {
  margin: 8px 0 12px;
  font-size: 20px;
  font-weight: 900;
}

.page-about .ab-story__card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .ab-story__card li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--panda-cloud);
}

.page-about .ab-story__card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 8px;
  background: var(--panda-orange);
  transform: rotate(45deg);
}

.page-about .ab-milestone__layout {
  display: grid;
  gap: 28px;
  margin-top: 32px;
}

.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--panda-black) 0 6px, transparent 6px 12px);
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 32px 40px;
}

.page-about .ab-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-timeline__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  background: var(--panda-orange);
  border-radius: 50%;
  border: 2px solid var(--panda-white);
  box-shadow: 0 0 0 2px var(--panda-orange);
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .ab-timeline__body {
  background: var(--panda-white);
  border: 1px solid #E5E5E5;
  clip-path: var(--ab-clip-cut);
  padding: 20px;
}

.page-about .ab-timeline__round {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--panda-orange);
}

.page-about .ab-timeline__title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 900;
}

.page-about .ab-timeline__desc {
  margin: 0;
  color: var(--panda-cloud);
  line-height: 1.7;
  font-size: 15px;
}

.page-about .ab-milestone__figure {
  margin: 0;
}

.page-about .ab-milestone__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--panda-black);
}

.page-about .ab-milestone__figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: #666;
  font-family: var(--font-mono);
}

.page-about .ab-system__grid {
  display: grid;
  gap: 20px;
  margin-top: 32px;
}

.page-about .ab-system__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background: var(--panda-white);
  border: 2px solid var(--panda-black);
  clip-path: var(--ab-clip-cut);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .ab-system__card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 8px 8px 0 var(--panda-black);
}

.page-about .ab-system__tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  color: var(--panda-white);
  background: var(--panda-black);
  clip-path: var(--ab-clip-sm);
}

.page-about .ab-system__tag--orange {
  background: var(--panda-orange);
}

.page-about .ab-system__tag--green {
  background: var(--panda-green);
}

.page-about .ab-system__tag--outline {
  background: transparent;
  color: var(--panda-black);
  border: 2px solid var(--panda-black);
  clip-path: none;
}

.page-about .ab-system__card h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 900;
  line-height: 1.4;
}

.page-about .ab-system__card p {
  margin: 0;
  color: var(--panda-cloud);
  line-height: 1.7;
  font-size: 15px;
}

.page-about .ab-system__card a {
  color: var(--panda-orange);
  font-weight: 700;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}

.page-about .ab-system__note {
  margin: 28px 0 0;
  padding: 18px 24px;
  background: var(--panda-black);
  color: var(--panda-white);
  clip-path: var(--ab-clip-cut);
  line-height: 1.8;
  font-size: 15px;
}

.page-about .ab-system__note a {
  color: var(--panda-orange);
  font-weight: 700;
}

.page-about .ab-data__grid {
  display: grid;
  gap: 28px;
  margin-top: 32px;
}

.page-about .ab-data__content p {
  margin: 0 0 24px;
  color: var(--panda-cloud);
  line-height: 1.8;
}

.page-about .ab-data__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .ab-data__stat {
  padding: 18px 16px;
  text-align: center;
  background: rgba(255, 255, 255, 0.8);
  border: 2px solid var(--panda-black);
  clip-path: var(--ab-clip-cut);
}

.page-about .ab-data__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--panda-black);
}

.page-about .ab-data__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: #555;
}

.page-about .ab-data__chart {
  width: 100%;
  height: auto;
  padding: 8px;
  background: var(--panda-white);
  border: 2px solid var(--panda-black);
}

.page-about .ab-data__chart text {
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-about .ab-data__figure {
  margin: 0;
}

.page-about .ab-data__figure img {
  width: 100%;
  height: auto;
  clip-path: var(--ab-clip-cut);
}

.page-about .ab-data__figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: #666;
  font-family: var(--font-mono);
}

.page-about .ab-team__lead {
  max-width: 800px;
  margin-bottom: 28px;
  color: var(--panda-cloud);
  line-height: 1.8;
}

.page-about .ab-team__grid {
  display: grid;
  gap: 20px;
}

.page-about .ab-team__card {
  padding: 24px;
  background: var(--panda-light-green);
  border: 2px solid var(--panda-black);
  clip-path: var(--ab-clip-cut);
  transition: background 0.25s var(--ease);
}

.page-about .ab-team__card:hover {
  background: #F0FCF4;
}

.page-about .ab-team__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 12px;
  background: var(--panda-black);
  color: var(--panda-white);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 800;
  clip-path: var(--ab-clip-sm);
}

.page-about .ab-team__card h3 {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 900;
}

.page-about .ab-team__summary {
  margin: 0;
  font-weight: 700;
  color: var(--panda-black);
}

.page-about .ab-team__detail {
  margin: 10px 0 0;
  color: #555;
  line-height: 1.7;
  font-size: 14px;
}

.page-about .ab-contact {
  margin-top: 40px;
  padding: 32px 24px;
  display: grid;
  gap: 32px;
  background: var(--panda-black);
  color: var(--panda-white);
  clip-path: var(--ab-clip-cut);
}

.page-about .ab-contact h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 900;
}

.page-about .ab-contact__info p {
  margin: 0 0 20px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
}

.page-about .ab-contact__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-contact__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.3);
}

.page-about .ab-contact__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--panda-orange);
  text-transform: uppercase;
}

.page-about .ab-contact__row dd {
  margin: 0;
  font-size: 15px;
  word-break: break-all;
}

.page-about .ab-contact .btn--secondary {
  border-color: rgba(255, 255, 255, 0.8);
  color: var(--panda-white);
}

.page-about .ab-trust {
  align-self: center;
  padding: 20px;
  border-left: 4px solid var(--panda-green);
  background: rgba(255, 255, 255, 0.06);
}

.page-about .ab-trust p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 72px 0 96px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .ab-hero h1 {
    font-size: 46px;
  }

  .page-about .ab-hero__lead {
    font-size: 17px;
  }

  .page-about .ab-section {
    padding: 72px 0;
  }

  .page-about .ab-story__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-milestone__layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-system__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .ab-data__grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-data__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .ab-team__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about .ab-contact {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    padding: 40px 36px;
  }
}

@media (min-width: 768px) {
  .page-about .ab-team__detail {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transform: translateY(-4px);
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), max-height 0.2s var(--ease);
  }

  .page-about .ab-team__card:hover .ab-team__detail,
  .page-about .ab-team__card:focus-within .ab-team__detail {
    opacity: 1;
    max-height: 140px;
    transform: none;
  }
}