.page-about {
  --about-line: rgba(14, 27, 51, .14);
  --about-line-soft: rgba(14, 27, 51, .08);
  --about-rail-w: 196px;
  --about-shadow: 0 18px 40px rgba(6, 11, 20, .08);
  background: var(--c-paper);
  color: var(--c-navy);
  font-family: var(--ff-body);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

.page-about .crumb-sep {
  margin: 0 8px;
  color: var(--c-numeral);
}

.page-about .about-h1 {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(28px, 4.6vw, 54px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
}

.page-about .about-h2 {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(23px, 2.6vw, 36px);
  line-height: 1.28;
  margin: 8px 0 0;
}

.page-about .about-sec-lede {
  max-width: 42em;
  margin: 14px 0 0;
  color: rgba(14, 27, 51, .72);
  line-height: 1.8;
}

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: 18px;
  background: var(--c-navy);
  color: var(--c-paper);
  padding: clamp(40px, 7vw, 84px) 0 clamp(48px, 8vw, 104px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -8%;
  top: -30%;
  width: 58%;
  height: 150%;
  background: linear-gradient(140deg, rgba(196, 103, 44, .26), rgba(227, 167, 104, .04));
  clip-path: polygon(0 0, 62% 0, 22% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -40%;
  width: 62%;
  height: 150%;
  background: linear-gradient(150deg, rgba(79, 168, 206, .24), rgba(46, 224, 200, .05));
  clip-path: polygon(46% 0, 100% 0, 100% 100%, 6% 100%);
  pointer-events: none;
}

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

.page-about .about-hero .eyebrow {
  color: var(--c-copper-lit);
}

.page-about .about-lede {
  max-width: 40em;
  margin: 20px 0 0;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: rgba(242, 244, 247, .84);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-side {
  display: grid;
  gap: 10px;
  margin-top: 36px;
}

.page-about .about-hero-side .numeral-bar {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(242, 244, 247, .06);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--c-copper);
  border-radius: 2px;
}

.page-about .about-hero-side .numeral-bar--ice {
  border-left-color: var(--c-ice);
}

.page-about .about-hero-side .numeral-bar--mint {
  border-left-color: var(--c-mint);
}

.page-about .numeral-bar-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-silver);
  text-transform: uppercase;
}

.page-about .numeral-bar-value {
  font-family: var(--ff-display);
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: .02em;
  color: var(--c-paper);
}

/* ---------- origin ---------- */
.page-about .about-origin {
  padding: clamp(48px, 7vw, 96px) 0 clamp(32px, 4vw, 56px);
}

.page-about .about-origin-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-origin-body p {
  line-height: 1.85;
  margin: 0 0 18px;
  max-width: 40em;
}

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

.page-about .about-origin-note {
  border-top: 3px solid var(--c-copper);
  background: #fff;
  border-right: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  border-left: 1px solid var(--about-line);
  padding: 22px 20px;
}

.page-about .note-title {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-numeral);
  text-transform: uppercase;
  margin: 0 0 16px;
}

.page-about .note-num {
  font-family: var(--ff-display);
  font-size: 32px;
  line-height: 1.1;
  margin: 0;
  color: var(--c-navy);
}

.page-about .note-desc {
  margin: 4px 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(14, 27, 51, .7);
}

.page-about .note-desc:last-child {
  margin-bottom: 0;
}

/* ---------- timeline ---------- */
.page-about .about-timeline {
  padding: clamp(40px, 6vw, 88px) 0 clamp(48px, 7vw, 104px);
  background: linear-gradient(180deg, rgba(199, 205, 214, .22), rgba(242, 244, 247, 0));
}

.page-about .about-timeline-head {
  margin-bottom: 34px;
}

.page-about .about-tl-grid {
  display: block;
}

.page-about .about-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--about-line);
  scrollbar-width: none;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .rail-link {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 132px;
  padding: 11px 14px;
  background: #fff;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--c-numeral);
  text-decoration: none;
  color: inherit;
  transition: border-color .25s var(--ease), background .25s var(--ease), transform .25s var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  border-left-color: var(--c-copper);
  transform: translateX(2px);
}

.page-about .rail-link.is-active {
  border-left-color: var(--c-cyan);
  background: #fff;
  box-shadow: var(--about-shadow);
}

.page-about .rail-year {
  font-family: var(--ff-display);
  font-size: 20px;
  letter-spacing: .03em;
}

.page-about .rail-tag {
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--c-numeral);
  letter-spacing: .04em;
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 38px 28px;
  scroll-margin-top: calc(var(--header-h) + 28px);
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: var(--about-line);
}

.page-about .tl-node:last-child::before {
  background: linear-gradient(180deg, var(--about-line), rgba(14, 27, 51, 0));
}

.page-about .tl-node::after {
  content: "";
  position: absolute;
  left: -4px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-paper);
  border: 2px solid var(--c-numeral);
}

.page-about .tl-node--upgrade::before {
  width: 3px;
  background: var(--grad-copper);
}

.page-about .tl-node--upgrade::after {
  border-color: var(--c-copper);
  background: var(--c-copper-lit);
}

.page-about .tl-node--spaced {
  padding-top: clamp(24px, 8vw, 72px);
}

.page-about .tl-node--spaced::before {
  top: calc(clamp(24px, 8vw, 72px) + 8px);
}

.page-about .tl-node--spaced::after {
  top: calc(clamp(24px, 8vw, 72px) + 6px);
}

.page-about .tl-media {
  margin: 0 0 22px;
  background: var(--c-navy);
}

.page-about .tl-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .92;
}

.page-about .tl-year {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: .16em;
  padding: 4px 10px;
  background: rgba(14, 27, 51, .06);
  border-left: 3px solid var(--c-copper);
  color: var(--c-navy);
}

.page-about .tl-title {
  font-family: var(--ff-display);
  font-size: clamp(20px, 2.1vw, 27px);
  letter-spacing: .01em;
  margin: 14px 0 10px;
  line-height: 1.3;
}

.page-about .tl-body p {
  max-width: 42em;
  line-height: 1.85;
  margin: 0;
  color: rgba(14, 27, 51, .84);
}

.page-about .tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .tl-tags li {
  font-family: var(--ff-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--c-numeral);
  border: 1px dashed var(--about-line);
  padding: 4px 9px;
}

/* ---------- archive ---------- */
.page-about .about-archive {
  padding: clamp(44px, 6vw, 92px) 0;
}

.page-about .about-archive .section-head {
  margin-bottom: 34px;
}

.page-about .archive-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .archive-grid .archive-card {
  padding: 24px 22px 26px;
  background: #fff;
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--c-copper);
  border-radius: 2px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .archive-grid .archive-card--clean {
  border-top-color: var(--c-ice);
}

.page-about .archive-grid .archive-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow);
}

.page-about .archive-card h3 {
  font-family: var(--ff-display);
  font-size: 19px;
  letter-spacing: .02em;
  margin: 12px 0 8px;
}

.page-about .archive-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(14, 27, 51, .74);
}

.page-about .archive-grid .card-num {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-numeral);
}

.page-about .archive-sample {
  margin-top: 28px;
  padding: 24px 22px;
  background: var(--c-navy);
  color: var(--c-paper);
  display: grid;
  gap: 16px;
  border-radius: 2px;
}

.page-about .archive-sample .numeral-bar {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  align-self: start;
  padding: 12px 16px;
  background: rgba(242, 244, 247, .07);
  border-left: 3px solid var(--c-mint);
}

.page-about .archive-sample .numeral-bar-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-silver);
}

.page-about .archive-sample .numeral-bar-value {
  font-family: var(--ff-mono);
  font-size: 19px;
  color: var(--c-cyan);
  white-space: nowrap;
}

.page-about .archive-sample-text {
  margin: 0;
  line-height: 1.85;
  color: rgba(242, 244, 247, .84);
  max-width: 46em;
}

.page-about .archive-sample .btn {
  justify-self: start;
}

/* ---------- report ---------- */
.page-about .about-report {
  padding: clamp(44px, 6vw, 92px) 0;
  background: #fff;
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-report-grid {
  display: grid;
  gap: 30px;
}

.page-about .about-report-media {
  margin: 0;
}

.page-about .about-report-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-line);
}

.page-about .report-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .report-item {
  padding: 20px 0;
  border-top: 1px solid var(--about-line-soft);
}

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

.page-about .report-code {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--c-navy);
  background: rgba(79, 168, 206, .12);
  border-left: 3px solid var(--c-ice);
  padding: 4px 10px;
  white-space: nowrap;
}

.page-about .report-item h3 {
  font-family: var(--ff-display);
  font-size: 18px;
  letter-spacing: .02em;
  margin: 12px 0 6px;
}

.page-about .report-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(14, 27, 51, .74);
  max-width: 44em;
}

.page-about .report-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(14, 27, 51, .66);
}

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

.page-about .report-note a:hover {
  color: var(--c-link-hover);
}

/* ---------- team ---------- */
.page-about .about-team {
  padding: clamp(44px, 6vw, 92px) 0;
}

.page-about .about-team-grid {
  display: grid;
  gap: 34px;
}

.page-about .about-team-copy > p {
  max-width: 40em;
  line-height: 1.85;
  margin: 16px 0 0;
  color: rgba(14, 27, 51, .82);
}

.page-about .team-roles {
  margin: 26px 0 0;
  display: grid;
  gap: 18px;
}

.page-about .team-role dt {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--ff-display);
  font-size: 17px;
  letter-spacing: .02em;
}

.page-about .team-role dd {
  margin: 7px 0 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(14, 27, 51, .72);
  border-left: 1px solid var(--about-line);
}

.page-about .about-team-chart {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.page-about .team-ring {
  width: min(300px, 78vw);
  height: auto;
}

.page-about .ring-base {
  fill: none;
  stroke: rgba(199, 205, 214, .55);
  stroke-width: 14;
}

.page-about .ring-seg {
  fill: none;
  stroke-width: 14;
  transform: rotate(-90deg);
  transform-origin: 70px 70px;
}

.page-about .ring-seg--eng {
  stroke: var(--c-copper);
}

.page-about .ring-seg--tech {
  stroke: var(--c-ice);
}

.page-about .ring-seg--cs {
  stroke: var(--c-mint);
}

.page-about .ring-seg--rest {
  stroke: var(--c-silver);
}

.page-about .ring-total {
  font-family: var(--ff-display);
  font-size: 30px;
  fill: var(--c-navy);
  text-anchor: middle;
}

.page-about .ring-unit {
  font-family: var(--ff-mono);
  font-size: 9px;
  fill: var(--c-numeral);
  text-anchor: middle;
  letter-spacing: .08em;
}

.page-about .ring-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  font-size: 14px;
  color: rgba(14, 27, 51, .78);
}

.page-about .ring-legend li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-about .legend-swatch {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  border-radius: 2px;
}

.page-about .legend-swatch--eng {
  background: var(--c-copper);
}

.page-about .legend-swatch--tech {
  background: var(--c-ice);
}

.page-about .legend-swatch--cs {
  background: var(--c-mint);
}

.page-about .legend-swatch--rest {
  background: var(--c-silver);
}

/* ---------- service ---------- */
.page-about .about-service {
  padding: clamp(44px, 6vw, 92px) 0;
  background: var(--c-navy);
  color: var(--c-paper);
}

.page-about .about-service .about-h2 {
  color: var(--c-paper);
}

.page-about .about-service .eyebrow {
  color: var(--c-ice-lit);
}

.page-about .about-service-grid {
  display: grid;
  gap: 30px;
}

.page-about .about-service-copy > p {
  max-width: 42em;
  line-height: 1.88;
  margin: 18px 0 0;
  color: rgba(242, 244, 247, .84);
}

.page-about .service-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

.page-about .service-stat {
  border-top: 2px solid var(--c-ice);
  padding-top: 12px;
}

.page-about .service-stat:nth-child(1) {
  border-top-color: var(--c-copper);
}

.page-about .service-stat:nth-child(3) {
  border-top-color: var(--c-mint);
}

.page-about .stat-num {
  display: block;
  font-family: var(--ff-display);
  font-size: clamp(28px, 3.4vw, 40px);
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-silver);
}

.page-about .about-service-media {
  margin: 0;
  border: 1px solid var(--line-dark);
}

.page-about .about-service-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- next ---------- */
.page-about .about-next {
  padding: clamp(44px, 6vw, 92px) 0;
}

.page-about .about-next-grid {
  display: grid;
  gap: 30px;
}

.page-about .about-next-head p {
  max-width: 38em;
  line-height: 1.85;
  margin: 16px 0 0;
  color: rgba(14, 27, 51, .8);
}

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

.page-about .next-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 6px 16px;
  padding: 20px 0;
  border-top: 1px solid var(--about-line);
}

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

.page-about .next-num {
  grid-row: 1 / span 2;
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--c-copper);
  padding-top: 4px;
}

.page-about .next-item h3 {
  grid-column: 2;
  font-family: var(--ff-display);
  font-size: 18px;
  letter-spacing: .02em;
  margin: 0;
}

.page-about .next-item p {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(14, 27, 51, .72);
}

/* ---------- close ---------- */
.page-about .about-close {
  background: var(--c-ink);
  color: var(--c-paper);
  padding: clamp(48px, 7vw, 96px) 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-close::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -60%;
  width: 52%;
  height: 220%;
  background: linear-gradient(150deg, rgba(46, 224, 200, .16), rgba(79, 168, 206, 0));
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-close-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-about .close-anchors {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.page-about .anchor-num {
  font-family: var(--ff-display);
  font-size: clamp(48px, 9vw, 96px);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--c-paper);
}

.page-about .anchor-range {
  font-family: var(--ff-mono);
  font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: .12em;
  color: var(--c-cyan);
}

.page-about .close-body .about-h2 {
  color: var(--c-paper);
}

.page-about .close-body p {
  max-width: 42em;
  margin: 16px 0 0;
  line-height: 1.85;
  color: rgba(242, 244, 247, .82);
}

.page-about .close-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

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

  .page-about .archive-sample {
    grid-template-columns: auto 1fr;
    align-items: start;
  }

  .page-about .archive-sample .btn {
    grid-column: 2;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-hero-side {
    margin-top: 8px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr) minmax(0, 2.6fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-tl-grid {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-rail {
    flex-direction: column;
    overflow: visible;
    gap: 6px;
    padding-bottom: 0;
    margin-bottom: 0;
    border-bottom: 0;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .rail-link {
    width: 100%;
  }

  .page-about .about-report-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-service-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: center;
  }

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-close-inner {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .archive-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}