.page-about {
  --about-gap: clamp(1.5rem, 3.5vw, 2.75rem);
  --about-panel-pad: clamp(1.15rem, 3vw, 2rem);
  --about-tone-line: rgba(244, 241, 230, 0.16);
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .about-top {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-top::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70% 90% at 94% -12%, rgba(123, 216, 143, 0.16), transparent 62%),
    radial-gradient(65% 85% at 4% 112%, rgba(77, 141, 218, 0.15), transparent 60%),
    radial-gradient(45% 60% at 50% 120%, rgba(231, 184, 75, 0.10), transparent 70%);
  pointer-events: none;
}

.page-about .about-top > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-top__eyebrow {
  margin: clamp(1rem, 3vw, 1.75rem) 0 0.9rem;
}

.page-about .about-top__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.page-about .about-top__lede {
  margin: clamp(1rem, 2.5vw, 1.6rem) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  color: var(--fg);
  opacity: 0.88;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem 1.5rem;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--about-tone-line);
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-autumn);
}

.page-about .about-facts__unit,
.page-about .about-scale__unit {
  font-size: 0.62em;
  margin-left: 0.12em;
}

.page-about .about-facts__label {
  font-size: 0.8125rem;
  color: var(--fg-dim);
  letter-spacing: 0.02em;
}

.page-about .about-top__band {
  height: 4px;
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  border-radius: 2px;
  background: linear-gradient(
    90deg,
    var(--c-spring) 0 25%,
    var(--c-summer) 25% 50%,
    var(--c-autumn) 50% 75%,
    var(--c-winter) 75% 100%
  );
  opacity: 0.85;
}

.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  padding-top: clamp(1.75rem, 4vw, 3rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-index {
  min-width: 0;
}

.page-about .about-index__label {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.page-about .about-index__list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.5rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__cell {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: block;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--about-tone-line);
  border-radius: var(--r-sm);
  font-size: 0.8125rem;
  color: var(--fg-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--c-paper);
  border-color: rgba(77, 141, 218, 0.6);
}

.page-about .about-index__link[aria-current="true"] {
  color: var(--c-ink);
  background: var(--c-winter);
  border-color: var(--c-winter);
  font-weight: 600;
}

.page-about .about-flow {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(2.25rem, 5vw, 4rem);
}

.page-about .about-sec {
  min-width: 0;
}

.page-about .about-sec__head {
  margin-bottom: clamp(1.15rem, 3vw, 1.9rem);
  padding-top: clamp(0.5rem, 1.5vw, 1rem);
  border-top: 1px solid var(--about-tone-line);
}

.page-about .about-sec__title {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: var(--step-h2);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
  max-width: 20ch;
}

.page-about .about-sec__lede {
  margin: 0.7rem 0 0;
  max-width: 58ch;
  font-size: 0.98rem;
  color: var(--fg-dim);
}

.page-about .about-inline-link {
  color: var(--c-winter);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--c-paper);
}

.page-about .about-media {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--r-md);
  object-fit: cover;
  background: var(--c-forest);
}

.page-about .figure {
  margin: 0;
}

.page-about .figure__caption {
  margin-top: 0.65rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--fg-dim);
}

/* 01 名字由来 */
.page-about .about-origin {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  align-items: start;
}

.page-about .about-origin__text p {
  margin: 0 0 0.95rem;
  font-size: 0.98rem;
}

.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin__fig {
  padding: var(--about-panel-pad);
  border: 1px solid var(--about-tone-line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(80% 80% at 50% 10%, rgba(123, 216, 143, 0.12), transparent 65%),
    var(--c-forest);
}

/* 02 服务对象 */
.page-about .about-who {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.page-about .about-who__item {
  position: relative;
  padding: clamp(0.9rem, 2.4vw, 1.35rem) clamp(0.9rem, 2.4vw, 1.4rem);
  padding-left: clamp(1.6rem, 4vw, 2.1rem);
  border: 1px solid var(--about-tone-line);
  border-radius: var(--r-md);
  background: var(--c-forest);
}

.page-about .about-who__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9rem;
  bottom: 0.9rem;
  width: 3px;
  border-radius: 2px;
  background: var(--c-moss);
}

.page-about .about-who__item:nth-child(1)::before { background: var(--c-spring); }
.page-about .about-who__item:nth-child(2)::before { background: var(--c-summer); }
.page-about .about-who__item:nth-child(3)::before { background: var(--c-autumn); }
.page-about .about-who__item:nth-child(4)::before { background: var(--c-winter); }

.page-about .about-who__key {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--fg-dim);
}

.page-about .about-who__name {
  margin: 0.2rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-who__desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--fg-dim);
}

/* 03 历程 */
.page-about .about-journey__fig {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-tone-line);
}

.page-about .about-journey__fig .about-media {
  border-radius: 0;
}

.page-about .about-journey__fig .figure__caption {
  margin: 0;
  padding: 0.6rem clamp(0.9rem, 2.4vw, 1.25rem) 0.85rem;
  background: var(--c-forest);
}

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

.page-about .about-line::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.55rem;
  bottom: 0.55rem;
  width: 1px;
  background: var(--about-tone-line);
}

.page-about .about-line__item {
  --tone: var(--c-moss);
  position: relative;
  padding-left: clamp(1.5rem, 4vw, 2.4rem);
  padding-bottom: clamp(1.35rem, 3vw, 2rem);
}

.page-about .about-line__item--spring { --tone: var(--c-spring); }
.page-about .about-line__item--summer { --tone: var(--c-summer); }
.page-about .about-line__item--autumn { --tone: var(--c-autumn); }
.page-about .about-line__item--winter { --tone: var(--c-winter); }

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

.page-about .about-line__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--tone);
  box-shadow: 0 0 0 4px var(--c-ink);
}

.page-about .about-line__year {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--tone);
}

.page-about .about-line__title {
  margin: 0.25rem 0 0.4rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.3vw, 1.3rem);
  font-weight: 700;
  line-height: 1.32;
}

.page-about .about-line__desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--fg-dim);
}

.page-about .about-line__more {
  margin-top: 0.65rem;
  border-left: 2px solid var(--tone);
  padding-left: 0.85rem;
}

.page-about .about-line__more summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--tone);
}

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

.page-about .about-line__more summary::before {
  content: "＋ ";
  font-family: var(--font-mono);
}

.page-about .about-line__more[open] summary::before {
  content: "－ ";
}

.page-about .about-line__more p {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  color: var(--fg-dim);
}

/* 04 团队 */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  align-items: start;
}

.page-about .about-team__name {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .about-team__text p {
  margin: 0 0 1.05rem;
  font-size: 0.9375rem;
  color: var(--fg-dim);
}

.page-about .about-team__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-team__fig {
  border: 1px solid var(--about-tone-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-forest);
}

.page-about .about-team__fig .about-media {
  border-radius: 0;
}

.page-about .about-team__fig .figure__caption {
  margin: 0;
  padding: 0.6rem 0.95rem 0.8rem;
}

.page-about .about-team__glass {
  margin-top: 0.9rem;
  padding: var(--about-panel-pad);
  border: 1px solid rgba(244, 241, 230, 0.22);
  border-radius: var(--r-lg);
  background: var(--c-glass);
  backdrop-filter: blur(6px);
}

.page-about .about-team__glass-label {
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--c-autumn);
}

.page-about .about-team__glass-text {
  margin: 0 0 0.9rem;
  font-size: 0.875rem;
  color: var(--fg);
  opacity: 0.85;
}

.page-about .about-team__glass-btn {
  font-size: 0.875rem;
}

/* 05 色带 */
.page-about .about-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.page-about .about-band__item {
  --tone: var(--c-moss);
  padding: 0.9rem 1rem 1.1rem;
  border: 1px solid var(--about-tone-line);
  border-top: 4px solid var(--tone);
  border-radius: 0 0 var(--r-md) var(--r-md);
  background: var(--c-forest);
  transition: background-color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-band__item--spring { --tone: var(--c-spring); }
.page-about .about-band__item--summer { --tone: var(--c-summer); }
.page-about .about-band__item--autumn { --tone: var(--c-autumn); }
.page-about .about-band__item--winter { --tone: var(--c-winter); }

.page-about .about-band__item:hover,
.page-about .about-band__item:focus-within {
  background: rgba(244, 241, 230, 0.06);
  border-color: var(--tone);
}

.page-about .about-band__season {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--tone);
}

.page-about .about-band__name {
  margin: 0.3rem 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .about-band__desc {
  margin: 0;
  font-size: 0.875rem;
  color: var(--fg-dim);
}

/* 06 覆盖 */
.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-scale__item {
  padding: 0.9rem 1rem;
  border: 1px solid var(--about-tone-line);
  border-radius: var(--r-md);
  background: var(--c-forest);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.15rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-spring);
}

.page-about .about-scale__item:nth-child(2) .about-scale__num { color: var(--c-summer); }
.page-about .about-scale__item:nth-child(3) .about-scale__num { color: var(--c-autumn); }
.page-about .about-scale__item:nth-child(4) .about-scale__num { color: var(--c-winter); }

.page-about .about-scale__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--fg-dim);
}

.page-about .about-partners__intro {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  color: var(--fg);
}

.page-about .about-partners__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.page-about .about-partners__item {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.7rem 0.9rem;
  border-left: 2px solid var(--about-tone-line);
  font-size: 0.9375rem;
  color: var(--fg-dim);
}

.page-about .about-partners__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 0.55rem;
  border-radius: 50%;
}

.page-about .about-partners__dot--spring { background: var(--c-spring); }
.page-about .about-partners__dot--autumn { background: var(--c-autumn); }
.page-about .about-partners__dot--winter { background: var(--c-winter); }

/* 07 CTA */
.page-about .about-cta {
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--about-tone-line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(140deg, rgba(240, 138, 60, 0.16), rgba(8, 28, 22, 0.35) 46%, rgba(77, 141, 218, 0.18)),
    var(--c-forest);
}

.page-about .about-cta__eyebrow {
  margin: 0 0 0.6rem;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
}

.page-about .about-cta__text {
  margin: 0.7rem 0 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  color: var(--fg);
  opacity: 0.86;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: clamp(1.1rem, 2.6vw, 1.6rem);
}

@media (min-width: 560px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0.15rem;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-left: 2px solid var(--about-tone-line);
    border-radius: 0;
    padding: 0.5rem 0 0.5rem 0.8rem;
    white-space: normal;
    font-size: 0.875rem;
    line-height: 1.45;
  }

  .page-about .about-index__link[aria-current="true"] {
    color: var(--c-winter);
    background: transparent;
    border-left-color: var(--c-winter);
    font-weight: 600;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  }

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

  .page-about .about-who__item {
    margin-left: 0;
  }

  .page-about .about-who__item:nth-child(even) {
    margin-left: clamp(1rem, 3vw, 2.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-band__item,
  .page-about .about-index__link {
    transition: none;
  }
}
<<<END>>>