.page-about {
  --about-sheet: #F4F7F3;
  --about-sheet-ink: #0B1E2F;
  --about-sheet-dim: rgba(11, 30, 47, .68);
  background-color: var(--ink-900);
  color: var(--text);
  overflow-x: clip;
}

.page-about a {
  color: inherit;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 3vw, 26px);
}

.page-about .about-crumb .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--text-faint);
}

.page-about .about-crumb .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-about .about-crumb .breadcrumbs a {
  text-decoration: none;
  color: var(--text-dim);
}

.page-about .about-crumb .breadcrumbs a:hover {
  color: var(--mint);
}

/* ---------- hero ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 52px) 0 clamp(10px, 2vw, 18px);
  border-bottom: 1px solid var(--line-soft);
  isolation: isolate;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
  filter: saturate(.75) contrast(1.05);
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 78% 8%, rgba(66, 245, 200, .16), transparent 62%),
    linear-gradient(180deg, rgba(7, 19, 31, .5) 0%, rgba(7, 19, 31, .92) 72%, var(--ink-900) 100%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-hero__copy h1 {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: .98;
  letter-spacing: -.015em;
}

.page-about .about-hero__copy h1 em {
  display: block;
  font-style: normal;
  color: var(--mint);
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 0 0 24px;
  font-size: clamp(1rem, 2.4vw, 1.125rem);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__actions .btn {
  text-decoration: none;
}

.page-about .about-board {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(18, 46, 68, .94), rgba(11, 30, 47, .96));
  box-shadow: var(--shadow-sheet);
}

.page-about .about-board::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 64px;
  height: 3px;
  background: var(--mint);
}

.page-about .about-board__label {
  margin: 0 0 14px;
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--text-faint);
}

.page-about .about-board__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-board__list li {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-board__num {
  font-size: 1.5rem;
  line-height: 1.1;
  color: var(--mint);
  letter-spacing: .02em;
}

.page-about .about-board__desc {
  font-size: .875rem;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .about-jump {
  display: flex;
  gap: 8px;
  margin-top: clamp(22px, 4vw, 34px);
  padding: 0 0 14px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-jump a {
  flex: 0 0 auto;
  padding: 7px 12px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--text-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--mint);
  color: var(--mint);
}

/* ---------- section shell ---------- */

.page-about .about-sec {
  padding: clamp(44px, 8vw, 88px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec--method {
  background:
    radial-gradient(90% 60% at 90% 0%, rgba(66, 245, 200, .08), transparent 60%),
    var(--ink-800);
}

.page-about .about-sec--partners {
  background:
    radial-gradient(80% 60% at 12% 100%, rgba(255, 122, 92, .09), transparent 62%),
    var(--ink-900);
}

.page-about .about-sec--promise {
  border-bottom: none;
  padding-bottom: clamp(52px, 9vw, 96px);
}

.page-about .about-sec__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-sec__head h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  line-height: 1.15;
  letter-spacing: -.01em;
}

.page-about .about-sec__intro {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- timeline ---------- */

.page-about .about-journey {
  position: relative;
  display: grid;
  gap: 18px;
}

.page-about .about-journey__rail {
  margin: 0;
  font-size: .6875rem;
  letter-spacing: .22em;
  color: var(--text-faint);
  writing-mode: vertical-rl;
  display: none;
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 0;
  list-style: none;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--mint), rgba(66, 245, 200, .25) 55%, var(--coral));
}

.page-about .tl-item {
  position: relative;
  padding-left: 38px;
  display: grid;
  gap: 6px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border: 2px solid var(--mint);
  border-radius: 50%;
  background: var(--ink-900);
}

.page-about .tl-year {
  font-size: 1rem;
  letter-spacing: .1em;
  color: var(--mint);
}

.page-about .tl-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: .01em;
}

.page-about .tl-body p {
  margin: 0 0 12px;
  font-size: .9688rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-inline-link {
  display: inline-block;
  margin-left: 10px;
  font-size: .8125rem;
  color: var(--info);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover {
  color: var(--mint-soft);
}

/* ---------- method ---------- */

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

.page-about .steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .step {
  position: relative;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: rgba(7, 19, 31, .62);
}

.page-about .step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--mint), rgba(66, 245, 200, .1));
}

.page-about .step:nth-child(3)::before,
.page-about .step:nth-child(4)::before {
  background: linear-gradient(90deg, var(--coral), rgba(255, 122, 92, .1));
}

.page-about .step__no {
  display: block;
  margin-bottom: 10px;
  font-size: 1.6rem;
  line-height: 1;
  color: rgba(66, 245, 200, .55);
  letter-spacing: .06em;
}

.page-about .step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
}

.page-about .step p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-method__figure {
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-method__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-method__figure .figure__caption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--text-faint);
  background: var(--ink-800);
}

.page-about .about-method__foot {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 4vw, 34px);
  padding: 20px 18px;
  border-left: 3px solid var(--coral);
  background: rgba(18, 46, 68, .5);
}

.page-about .about-method__foot p {
  margin: 0;
  font-size: .9688rem;
  line-height: 1.8;
  color: var(--text-dim);
}

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

.page-about .about-method__links .btn {
  text-decoration: none;
}

/* ---------- team ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(22px, 4vw, 36px);
  align-items: start;
}

.page-about .about-team__main {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-about .duty {
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .duty summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .duty summary::after {
  content: "＋";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--mint);
}

.page-about .duty[open] summary::after {
  content: "−";
  color: var(--coral);
}

.page-about .duty[open] summary {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .duty__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: .01em;
}

.page-about .duty__count {
  margin-left: auto;
  font-size: .875rem;
  letter-spacing: .08em;
  color: var(--mint);
}

.page-about .duty__body {
  padding: 14px 18px 18px;
}

.page-about .duty__body p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-about .about-note {
  padding: 22px 20px 24px;
  background: var(--about-sheet);
  color: var(--about-sheet-ink);
  border-top: 3px solid var(--coral);
  box-shadow: var(--shadow-sheet);
}

.page-about .about-note__label {
  margin: 0 0 12px;
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--coral-deep);
}

.page-about .about-note h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.25;
}

.page-about .about-note p {
  margin: 0 0 16px;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--about-sheet-dim);
}

.page-about .about-note__list {
  margin: 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px solid rgba(11, 30, 47, .16);
  display: grid;
  gap: 8px;
  font-size: .875rem;
}

.page-about .about-note__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-note__list .mono {
  min-width: 2ch;
  font-size: 1.05rem;
  color: var(--coral-deep);
}

/* ---------- partners ---------- */

.page-about .about-partners__figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-about .about-partners {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
  align-items: start;
}

.page-about .about-network {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--line);
  background:
    radial-gradient(70% 70% at 50% 45%, rgba(66, 245, 200, .09), transparent 70%),
    var(--ink-800);
}

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

.page-about .net-lines line {
  stroke: rgba(36, 68, 90, .95);
  stroke-width: 1.2;
}

.page-about .net-node {
  transition: opacity .2s var(--ease), stroke-width .2s var(--ease);
}

.page-about .net-node--hub {
  fill: var(--mint);
  stroke: var(--mint-soft);
  stroke-width: 2;
}

.page-about .net-hub-text {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  fill: var(--ink-900);
  letter-spacing: .08em;
}

.page-about .net-node--content {
  fill: rgba(66, 245, 200, .22);
  stroke: var(--mint);
  stroke-width: 1.6;
}

.page-about .net-node--tech {
  fill: rgba(90, 169, 255, .22);
  stroke: var(--info);
  stroke-width: 1.6;
}

.page-about .net-node--community {
  fill: rgba(255, 122, 92, .24);
  stroke: var(--coral);
  stroke-width: 1.6;
}

.page-about .net-node:hover {
  stroke-width: 4;
  opacity: .92;
}

.page-about .about-partners__side {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.page-about .legend {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .legend li {
  position: relative;
  padding-left: 22px;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .legend strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
}

.page-about .legend__dot {
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.page-about .legend__dot--content {
  background: var(--mint);
}

.page-about .legend__dot--tech {
  background: var(--info);
}

.page-about .legend__dot--community {
  background: var(--coral);
}

.page-about .about-coverage {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border: 1px dashed var(--line);
  background: rgba(18, 46, 68, .42);
}

.page-about .about-coverage__num {
  margin: 0;
  font-size: clamp(2rem, 6vw, 2.8rem);
  line-height: 1;
  color: var(--mint);
}

.page-about .about-coverage__text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-flowband {
  margin-top: clamp(24px, 4vw, 36px);
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(100deg, rgba(18, 46, 68, .8), rgba(11, 30, 47, .8));
}

.page-about .about-flowband__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--text-faint);
}

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

.page-about .flowband li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 2px solid var(--mint);
  background: rgba(7, 19, 31, .55);
  font-size: .9375rem;
}

.page-about .flowband li .mono {
  color: var(--mint);
  font-size: .75rem;
  letter-spacing: .1em;
}

.page-about .about-flowband__note {
  margin: 14px 0 16px;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-flowband .btn {
  text-decoration: none;
}

/* ---------- honors ---------- */

.page-about .about-honors {
  display: grid;
  gap: 12px;
}

.page-about .honor {
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .honor summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .honor summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--mint);
}

.page-about .honor[open] summary::after {
  content: "−";
  color: var(--coral);
}

.page-about .honor[open] summary {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .honor__num {
  flex: 0 0 auto;
  min-width: 3.6ch;
  font-size: clamp(1.3rem, 4vw, 1.9rem);
  line-height: 1;
  color: var(--mint);
}

.page-about .honor__name {
  font-size: .9375rem;
  line-height: 1.5;
  color: var(--text);
}

.page-about .honor p {
  margin: 0;
  padding: 14px 18px 18px;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- promise ---------- */

.page-about .about-promise {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
  align-items: start;
}

.page-about .about-promise__copy h2 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  line-height: 1.15;
}

.page-about .about-promise__copy > p {
  margin: 0 0 20px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-promise__list {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-promise__list li {
  padding-left: 14px;
  border-left: 2px solid var(--line);
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-promise__list .mono {
  margin-right: 8px;
  color: var(--mint);
  letter-spacing: .04em;
}

.page-about .about-promise__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-promise__actions .btn {
  text-decoration: none;
}

.page-about .about-contact-sheet {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(18, 46, 68, .92), rgba(11, 30, 47, .96));
  box-shadow: var(--shadow-sheet);
}

.page-about .about-contact-sheet__label {
  margin: 0 0 16px;
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--text-faint);
}

.page-about .about-contact-sheet dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-contact-sheet__row dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--text-faint);
}

.page-about .about-contact-sheet__row dd {
  margin: 0;
  font-size: .9688rem;
  line-height: 1.6;
  color: var(--text);
  user-select: all;
  word-break: break-word;
}

.page-about .about-contact-sheet__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--text-faint);
}

/* ---------- responsive ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-board__list li {
    grid-template-columns: 8ch minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }

  .page-about .about-board__desc {
    font-size: .8125rem;
  }

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

  .page-about .about-method__foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

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

  .page-about .about-team,
  .page-about .about-promise {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-bottom: clamp(18px, 2.4vw, 30px);
  }

  .page-about .about-journey {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .about-journey__rail {
    display: block;
    justify-self: start;
    padding-top: 6px;
  }

  .page-about .timeline::before {
    left: 131px;
  }

  .page-about .tl-item {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 30px;
    padding-left: 0;
  }

  .page-about .tl-item::before {
    left: 132px;
    transform: translateX(-50%);
  }

  .page-about .tl-year {
    text-align: right;
    padding-top: 2px;
    font-size: 1.05rem;
  }

  .page-about .about-method {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }

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

  .page-about .flowband li {
    border-left-width: 3px;
  }

  .page-about .honor summary {
    padding: 18px 22px;
  }

  .page-about .honor p {
    padding: 16px 22px 20px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-method {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  }

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

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