.page-about {
  --about-gap: clamp(1.25rem, 4vw, 2.75rem);
  --about-band: clamp(3rem, 7vw, 5.5rem);
  background: var(--mist);
  color: var(--graphite);
  overflow-x: clip;
}

.page-about h1,
.page-about h2 {
  font-family: var(--font-display);
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.9rem);
  line-height: 1.18;
  margin: 0 0 1rem;
}

.page-about h3 {
  font-family: var(--font-body);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin: 0.4rem 0 0.5rem;
}

.page-about p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .mono {
  font-family: var(--font-mono);
}

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(212, 160, 23, 0.16), transparent 58%),
    linear-gradient(180deg, var(--warm), var(--mist));
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(31, 59, 45, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 59, 45, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.15));
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  margin-top: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-hero__lead h1 {
  font-size: clamp(2.25rem, 8vw, 4.4rem);
  font-weight: 700;
  line-height: 1.06;
  margin: 0.5rem 0 1.1rem;
}

.page-about .about-hero__intro {
  max-width: 40ch;
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  color: var(--graphite);
  margin: 0 0 1.6rem;
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero__plate {
  position: relative;
  padding: 1.35rem 1.25rem 1.2rem;
  background: rgba(247, 244, 238, 0.72);
  border: 1px solid rgba(31, 59, 45, 0.16);
  border-left: 3px solid var(--shajin);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-about .about-plate__cap {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--shajin-deep);
  margin: 0 0 0.9rem;
}

.page-about .about-plate__list {
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-plate__list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px dashed var(--line-strong);
}

.page-about .about-plate__list > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-plate__list dt {
  font-size: 0.82rem;
  color: var(--graphite);
  opacity: 0.78;
}

.page-about .about-plate__list dd {
  margin: 0;
  font-size: 1rem;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-plate__note {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--graphite);
  opacity: 0.8;
}

/* ---------- origin ---------- */
.page-about .about-origin {
  padding: var(--about-band) 0;
  background: var(--mist);
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-origin__text p {
  max-width: 46ch;
}

.page-about .about-origin__quote {
  margin: 1.5rem 0 0;
  padding: 1.1rem 0 1.1rem 1.15rem;
  border-left: 3px solid var(--copper);
}

.page-about .about-origin__quote p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-figure {
  position: relative;
  margin: 0;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--warm);
  background: linear-gradient(0deg, rgba(19, 37, 28, 0.86), rgba(19, 37, 28, 0));
}

.page-about .media-frame.about-figure--origin {
  aspect-ratio: 4 / 3;
}

.page-about .media-frame.about-figure--archive {
  aspect-ratio: 10 / 7;
  margin-top: 1.5rem;
}

.page-about .media-frame.about-figure--cover {
  aspect-ratio: 3 / 2;
  border: 1px solid rgba(201, 198, 189, 0.28);
}

/* ---------- timeline ---------- */
.page-about .about-track {
  padding: var(--about-band) 0;
  background: var(--warm);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-track .section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-timeline {
  --tl-pad: clamp(1.1rem, 3vw, 2.4rem);
  list-style: none;
  margin: 0 0 0 0.35rem;
  padding: 0 0 0 var(--tl-pad);
  border-left: 1px solid var(--line-strong);
}

.page-about .about-tl {
  position: relative;
  display: grid;
  grid-template-columns: 4.9rem minmax(0, 1fr);
  gap: 0.35rem 1.1rem;
  padding-bottom: clamp(1.75rem, 4vw, 2.6rem);
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: calc(-1 * var(--tl-pad) - 5px);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--shajin);
  box-shadow: 0 0 0 4px rgba(212, 160, 23, 0.18);
}

.page-about .about-tl__year {
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 600;
  color: var(--shajin-deep);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.page-about .about-tl__body h3 {
  margin-top: 0;
}

.page-about .about-tl__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.96rem;
}

/* ---------- archive ---------- */
.page-about .about-archive {
  padding: var(--about-band) 0;
  background:
    linear-gradient(180deg, var(--mist), var(--warm));
}

.page-about .about-archive__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-archive__aside p {
  max-width: 44ch;
}

.page-about .about-arch {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-arch__card {
  position: relative;
  padding: 1.35rem 1.25rem 1.4rem;
  background: var(--warm);
  transition: background 240ms var(--ease);
}

.page-about .about-arch__card:hover {
  background: rgba(212, 160, 23, 0.09);
}

.page-about .about-arch__num {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.page-about .about-arch__card h3 {
  font-size: 1.12rem;
}

.page-about .about-arch__card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-about .about-archive__rhythm {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-rhythm {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.4rem;
  padding: 1rem 1.1rem;
  background: rgba(31, 59, 45, 0.05);
  border-left: 2px solid var(--shajin);
}

.page-about .about-rhythm__key {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--ink);
}

.page-about .about-rhythm p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- coverage ---------- */
.page-about .about-cover {
  position: relative;
  padding: var(--about-band) 0;
  background:
    radial-gradient(90% 70% at 12% 8%, rgba(212, 160, 23, 0.2), transparent 60%),
    var(--ink);
  color: var(--warm);
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(247, 244, 238, 0.06) 1px, transparent 1px);
  background-size: 96px 100%;
  pointer-events: none;
}

.page-about .about-cover > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-cover__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-cover h2 {
  color: var(--warm);
}

.page-about .about-cover__text p {
  color: rgba(247, 244, 238, 0.82);
  max-width: 46ch;
}

.page-about .about-cover__text .btn {
  margin-top: 0.75rem;
}

.page-about .about-cover__panel {
  display: grid;
  gap: 1.1rem;
}

.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.page-about .about-node {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.65rem 0.8rem;
  font-size: 0.88rem;
  color: var(--warm);
  background: rgba(247, 244, 238, 0.08);
  border: 1px solid rgba(247, 244, 238, 0.16);
  border-radius: var(--radius);
}

.page-about .about-node span {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--shajin);
}

/* ---------- milestones ---------- */
.page-about .about-miles {
  padding: var(--about-band) 0;
  background: var(--warm);
}

.page-about .about-miles .section-head {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-miles__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-mile {
  padding: 1.4rem 1.2rem 1.5rem;
  background: var(--mist);
  border-top: 2px solid var(--ink);
  border-radius: var(--radius);
}

.page-about .about-mile__num {
  margin: 0;
  font-size: clamp(2.1rem, 5vw, 3.1rem);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.page-about .about-mile__num span {
  font-size: 0.9rem;
  font-weight: 400;
  margin-left: 0.25rem;
  color: var(--shajin-deep);
}

.page-about .about-mile h3 {
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--shajin-deep);
  margin: 0.7rem 0 0.35rem;
}

.page-about .about-mile p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---------- next ---------- */
.page-about .about-next {
  padding: var(--about-band) 0 calc(var(--about-band) + 1rem);
  background: var(--mist);
  border-top: 1px solid var(--line);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-next__lead p {
  max-width: 42ch;
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-next__list a {
  display: grid;
  gap: 0.25rem;
  padding: 1rem 1.15rem;
  background: var(--warm);
  text-decoration: none;
  transition: background 200ms var(--ease), padding-left 200ms var(--ease);
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  background: rgba(212, 160, 23, 0.12);
  padding-left: 1.4rem;
}

.page-about .about-next__label {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-next__desc {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--graphite);
  opacity: 0.82;
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- responsive ---------- */
@media (min-width: 640px) {
  .page-about .about-arch {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-miles__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-tl {
    grid-template-columns: 6.5rem minmax(0, 1fr);
    gap: 0.35rem 1.75rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-archive__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

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

  .page-about .about-mile:nth-child(2) {
    margin-top: 1.25rem;
  }

  .page-about .about-mile:nth-child(3) {
    margin-top: 2.5rem;
  }

  .page-about .about-mile:nth-child(4) {
    margin-top: 3.75rem;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-arch__card,
  .page-about .about-next__list a {
    transition: none;
  }
}