.page-about {
  --about-cut: 18px;
  --about-pad: clamp(16px, 3vw, 26px);
  --about-top: clamp(94px, 15vw, 152px);
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 26px);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

/* ---------- 01 hero ---------- */
.page-about .about-hero {
  padding-top: var(--about-top);
  padding-bottom: clamp(38px, 6vw, 72px);
}

.page-about .about-hero__kicker {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(34px, 5.4vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-about .about-hero__title span {
  display: block;
  color: var(--cyan);
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 38em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-rail {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}

.page-about .about-rail__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(14px, 2vw, 20px);
  background: var(--ink-950);
}

.page-about .about-rail__num {
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.01em;
}

.page-about .about-rail__label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-mute);
}

.page-about .about-hero__figure {
  margin: clamp(26px, 4.5vw, 48px) 0 0;
}

.page-about .about-hero__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-lines {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-lines__item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "idx name"
    "idx desc";
  gap: 4px 14px;
  padding: 16px 4px;
  background: var(--ink-900);
}

.page-about .about-lines__idx {
  grid-area: idx;
  font-size: 12px;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-lines__name {
  grid-area: name;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-lines__desc {
  grid-area: desc;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* ---------- 02 timeline ---------- */
.page-about .about-timeline {
  padding-block: clamp(40px, 6vw, 78px);
}

.page-about .tl-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 30px) 0 clamp(26px, 4vw, 40px);
}

.page-about .tl-jump__link {
  display: inline-block;
  padding: 7px 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
  border: 1px solid var(--line);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: border-color .22s var(--ease), color .22s var(--ease);
}

.page-about .tl-jump__link:hover,
.page-about .tl-jump__link:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(61, 245, 200, .28) 62%, rgba(61, 245, 200, 0) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(28px, 4.5vw, 46px) 32px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .tl__stage {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
}

.page-about .tl__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.4;
}

.page-about .tl__text {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-mute);
}

/* ---------- 03 team ---------- */
.page-about .about-team {
  padding-block: clamp(40px, 6vw, 78px);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .folder {
  background: linear-gradient(155deg, rgba(61, 245, 200, .55), rgba(47, 91, 76, .85));
  padding: 1px;
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

.page-about .folder__inner {
  height: 100%;
  padding: var(--about-pad);
  background: var(--ink-800);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

.page-about .folder__tab {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 9px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-950);
  background: var(--cyan);
}

.page-about .folder__title {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-about .folder__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .folder__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .folder__list li {
  padding: 9px 0 0 14px;
  margin-top: 9px;
  position: relative;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-mute);
  border-top: 1px solid rgba(47, 91, 76, .55);
}

.page-about .folder__list li:first-child {
  border-top: 0;
  margin-top: 0;
}

.page-about .folder__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

.page-about .folder__list li:first-child::before {
  top: 16px;
}

/* ---------- 04 maintain ---------- */
.page-about .about-maintain {
  padding-block: clamp(40px, 6vw, 78px);
}

.page-about .about-maintain__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-maintain__lead {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .metrics {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border-top: 1px solid var(--line);
}

.page-about .metrics__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .metrics__label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-mute);
}

.page-about .metrics__value {
  flex: none;
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--cyan);
  white-space: nowrap;
}

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

.page-about .about-maintain__figure .figure__img,
.page-about .about-eco__figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 05 eco ---------- */
.page-about .about-eco {
  padding-block: clamp(40px, 6vw, 78px);
}

.page-about .about-eco__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(20px, 3vw, 32px);
  align-items: start;
}

.page-about .about-eco__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .eco-stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px;
  padding: clamp(14px, 2.2vw, 22px);
  background: var(--ink-950);
}

.page-about .eco-stat__num {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .eco-stat__unit {
  font-size: 13px;
  color: var(--cyan-soft);
}

.page-about .eco-stat__label {
  flex: 1 0 100%;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-mute);
}

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

/* ---------- 06 principles ---------- */
.page-about .about-principles {
  padding-block: clamp(40px, 6vw, 78px);
}

.page-about .principle {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .principle__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: 1px solid var(--line);
}

.page-about .principle__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .principle__idx {
  grid-row: 1 / span 2;
  font-size: 13px;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .principle__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(18px, 2.3vw, 24px);
  line-height: 1.4;
}

.page-about .principle__text {
  margin: 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-about .about-next {
  margin-top: clamp(30px, 5vw, 52px);
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink-950);
  border-left: 2px solid var(--orange);
}

.page-about .about-next__lead {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

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

/* ---------- media ---------- */
@media (min-width: 700px) {
  .page-about .about-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .tl__item {
    padding-left: 40px;
  }

  .page-about .tl::before {
    left: 8px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .about-maintain__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-about .about-eco__figure {
    order: -1;
  }

  .page-about .principle__item {
    grid-template-columns: 56px minmax(0, 16em) minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .principle__idx {
    grid-row: auto;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    max-width: 13em;
  }
}
<<<END>>>