/* =============================================
   About page — scope limited to .page-about
   ============================================= */
.page-about {
  --about-gutter: clamp(20px, 4vw, 48px);
  --about-pad: 64px;
  --about-line-light: rgba(247, 245, 240, 0.22);
  background: var(--color-cloud-mist);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: clip;
}

.page-about .container {
  box-sizing: border-box;
  width: min(100% - 2 * var(--about-gutter), var(--content-max-width));
  margin-inline: auto;
}

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

/* --- Shared section elements --- */
.page-about .about-section-index {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-num);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-vivid-orange);
  letter-spacing: -0.02em;
}

.page-about .about-section-tag {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-gobi-gray);
}

.page-about .about-section-title {
  margin: 12px 0 16px;
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* --- Hero --- */
.page-about .about-hero {
  padding: 56px 0 48px;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-vivid-orange);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 10vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  max-width: 38em;
  margin: 0 0 28px;
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--color-gobi-gray);
}

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

.page-about .about-hero__visual {
  position: relative;
  isolation: isolate;
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: auto -18px -18px auto;
  width: 62%;
  height: 62%;
  border-radius: var(--radius);
  background: var(--color-sand-light);
  z-index: -1;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
}

.page-about .about-hero__stamp {
  position: absolute;
  left: -14px;
  bottom: 32px;
  padding: 12px 14px;
  background: var(--color-slate-dark);
  color: var(--color-snow-white);
  font-family: var(--font-num);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.12em;
  border-radius: var(--radius-sm);
  transform: rotate(-6deg);
}

/* --- Stats --- */
.page-about .about-stats {
  padding: 36px 0;
  background: linear-gradient(120deg, var(--color-sand-light), var(--color-desert-sand));
  border-block: 1px solid var(--color-border);
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.page-about .about-stats__item {
  padding: 18px 0 18px 16px;
  border-left: 3px solid var(--color-vivid-orange);
}

.page-about .about-stats__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-slate-dark);
}

.page-about .about-stats__label {
  margin: 8px 0 0;
  font-size: 0.92rem;
  color: var(--color-slate-dark);
}

/* --- Mission --- */
.page-about .about-mission {
  padding: var(--about-pad) 0;
}

.page-about .about-mission__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-mission__aside {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-mission__body {
  max-width: 52em;
}

.page-about .about-mission__lead {
  margin: 0 0 28px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--color-slate-dark);
}

.page-about .about-mission__points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .about-mission__point {
  padding: 24px;
  background: var(--color-cloud-mist);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}

.page-about .about-mission__point:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-mission__point h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 1.08rem;
  color: var(--color-ink);
}

.page-about .about-mission__point p {
  margin: 0;
  color: var(--color-gobi-gray);
}

.page-about .about-mission__quote {
  margin: 28px 0 0;
  padding: 20px 24px;
  border-left: 4px solid var(--color-vivid-orange);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--color-snow-white);
}

.page-about .about-mission__quote p {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-slate-dark);
}

/* --- Journey / Timeline --- */
.page-about .about-journey {
  padding: var(--about-pad) 0;
  background: var(--color-snow-white);
  border-block: 1px solid var(--color-border);
}

.page-about .about-journey__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 48px;
}

.page-about .about-journey__titlewrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-journey__titlewrap .about-section-index {
  font-size: 2.6rem;
}

.page-about .about-journey__intro {
  max-width: 40em;
  margin: 0;
  color: var(--color-gobi-gray);
}

.page-about .about-journey__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 94px;
  width: 2px;
  background: var(--color-gobi-gray);
  opacity: 0.35;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 20px;
  padding: 0 0 28px;
}

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

.page-about .about-timeline__node {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.page-about .about-timeline__node::before {
  content: "";
  width: 12px;
  height: 12px;
  margin-top: 6px;
  background: var(--color-vivid-orange);
  border: 2px solid var(--color-cloud-mist);
  border-radius: 2px;
  transform: rotate(45deg);
  box-shadow: 0 0 0 2px var(--color-vivid-orange);
}

.page-about .about-timeline__version {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.1;
  color: var(--color-slate-dark);
}

.page-about .about-timeline__pill {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-vivid-orange);
  background: rgba(255, 107, 26, 0.12);
  border-radius: 999px;
}

.page-about .about-timeline__card {
  padding: 20px 22px;
  background: var(--color-cloud-mist);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-vivid-orange);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out), border-color 200ms var(--ease-out);
}

.page-about .about-timeline__card:hover,
.page-about .about-timeline__item:focus-within .about-timeline__card {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
}

.page-about .about-timeline__card > p {
  margin: 0 0 12px;
  font-size: 0.94rem;
  color: var(--color-gobi-gray);
}

.page-about .about-timeline__details {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border);
  font-size: 0.9rem;
  color: var(--color-gobi-gray);
}

.page-about .about-timeline__details summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-vivid-orange);
  list-style: none;
}

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

.page-about .about-timeline__details-body {
  margin-top: 10px;
}

.page-about .about-timeline__details-body p {
  margin: 0;
}

.page-about .about-journey__side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-journey__imgwrap,
.page-about .about-service__imgwrap {
  overflow: hidden;
  border-radius: var(--radius);
  aspect-ratio: 3 / 2;
}

.page-about .about-journey__imgwrap img,
.page-about .about-service__imgwrap img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-journey__note {
  padding: 24px;
  background: var(--color-sand-light);
  border-radius: var(--radius);
}

.page-about .about-journey__note p {
  margin: 0 0 16px;
  color: var(--color-slate-dark);
}

/* --- Homeland --- */
.page-about .about-homeland {
  padding: var(--about-pad) 0;
  background: var(--color-slate-dark);
  color: var(--color-snow-white);
}

.page-about .about-homeland__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about .about-homeland__body {
  max-width: 56em;
}

.page-about .about-section-index--light {
  color: var(--color-vivid-orange);
}

.page-about .about-section-tag--light {
  color: var(--color-sand-light);
}

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

.page-about .about-homeland__lead {
  color: var(--color-sand-light);
  font-size: 1.08rem;
}

.page-about .about-homeland__list {
  display: grid;
  gap: 12px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.page-about .about-homeland__list li {
  position: relative;
  padding-left: 20px;
  color: var(--color-cloud-mist);
}

.page-about .about-homeland__list li::before {
  content: "";
  position: absolute;
  top: 0.8em;
  left: 0;
  width: 8px;
  height: 2px;
  background: var(--color-vivid-orange);
}

.page-about .about-homeland__foot {
  margin-bottom: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--about-line-light);
  color: var(--color-sand-light);
  font-weight: 700;
}

.page-about .about-homeland__visual {
  position: relative;
  min-height: 320px;
}

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

/* --- Service --- */
.page-about .about-service {
  padding: var(--about-pad) 0;
}

.page-about .about-service__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.page-about .about-service__head .about-section-index {
  font-size: 2.6rem;
}

.page-about .about-service__intro {
  margin: 0;
  color: var(--color-gobi-gray);
}

.page-about .about-service__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}

.page-about .about-service__list {
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--color-slate-dark);
}

.page-about .about-service__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}

.page-about .about-service__row dt {
  font-family: var(--font-heading);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-gobi-gray);
}

.page-about .about-service__row dd {
  margin: 0;
  font-size: 1.06rem;
  color: var(--color-ink);
}

.page-about .about-service__right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-service__hint {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--color-vivid-orange);
  font-size: 0.86rem;
  color: var(--color-gobi-gray);
}

/* --- Next / Explore --- */
.page-about .about-next {
  padding: var(--about-pad) 0;
  background: var(--color-sand-light);
  border-top: 4px solid var(--color-desert-sand);
}

.page-about .about-next__title {
  margin: 0 0 28px;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--color-slate-dark);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-next__card {
  position: relative;
  display: block;
  padding: 28px 24px;
  background: var(--color-cloud-mist);
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--color-ink);
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out), border-color 200ms var(--ease-out);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--color-vivid-orange);
  box-shadow: var(--shadow-lift);
  outline: none;
}

.page-about .about-next__index {
  position: absolute;
  top: 24px;
  right: 24px;
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-desert-sand);
}

.page-about .about-next__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
}

.page-about .about-next__card p {
  max-width: 30em;
  margin: 0;
  padding-right: 40px;
  font-size: 0.95rem;
  color: var(--color-gobi-gray);
}

.page-about .about-next__arrow {
  display: block;
  margin-top: 18px;
  font-size: 1.34rem;
  line-height: 1;
  color: var(--color-vivid-orange);
  transition: transform 200ms var(--ease-out);
}

.page-about .about-next__card:hover .about-next__arrow {
  transform: translateX(6px);
}

/* --- Desktop media query --- */
@media (min-width: 920px) {
  .page-about {
    --about-pad: 88px;
  }

  .page-about .about-hero {
    padding-top: 36px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 64px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .about-mission__layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-mission__aside {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 20px;
    border-left: 4px solid var(--color-vivid-orange);
  }

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

  .page-about .about-journey__head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }

  .page-about .about-journey__intro {
    padding-bottom: 8px;
    text-align: right;
  }

  .page-about .about-journey__layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
    gap: 48px;
  }

  .page-about .about-homeland__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
    gap: 64px;
  }

  .page-about .about-service__layout {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
    gap: 64px;
  }

  .page-about .about-service__row {
    grid-template-columns: 160px 1fr;
    gap: 24px;
    align-items: baseline;
  }

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