.page-about {
  --about-rail-w: 232px;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 48px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 86% -14%, rgba(53, 224, 196, 0.16), transparent 62%),
    radial-gradient(80% 60% at -4% 0%, rgba(255, 158, 74, 0.1), transparent 58%);
  border-bottom: 1px solid var(--qd-indigo-700);
}

.page-about .about-hero::after {
  content: "~/install";
  position: absolute;
  right: -12px;
  bottom: -34px;
  font-family: var(--qd-font-mono);
  font-size: clamp(70px, 15vw, 200px);
  line-height: 1;
  color: rgba(53, 224, 196, 0.055);
  pointer-events: none;
  white-space: nowrap;
}

.page-about .qd-crumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .qd-eyebrow {
  color: var(--qd-teal);
  font-family: var(--qd-font-mono);
  margin: 0 0 12px;
}

.page-about .about-hero__title {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 16em;
  font-family: var(--qd-font-sans);
  font-weight: 900;
  font-size: clamp(34px, 6vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--qd-sand);
}

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

.page-about .about-hero__lead {
  position: relative;
  z-index: 1;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 44em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--qd-rock);
}

.page-about .about-hero__meta {
  position: relative;
  z-index: 1;
  margin: 22px 0 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--qd-teal-600);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  padding-top: clamp(30px, 4.5vw, 56px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-rail__card {
  border: 1px solid var(--qd-indigo-700);
  border-radius: var(--qd-radius-md);
  background: rgba(23, 34, 74, 0.62);
  padding: 16px 18px 8px;
}

.page-about .about-rail__label {
  margin: 0 0 8px;
  font-family: var(--qd-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--qd-teal);
}

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

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 14px;
  color: var(--qd-rock);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 48, 95, 0.72);
  transition: color 0.2s var(--qd-ease);
}

.page-about .about-rail__list li:last-child .about-rail__link {
  border-bottom: 0;
}

.page-about .about-rail__link span {
  font-family: var(--qd-font-mono);
  font-size: 12px;
  color: var(--qd-teal);
  flex: none;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--qd-sand);
}

.page-about .about-rail__hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--qd-rock);
}

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

.page-about .about-chapter {
  padding-bottom: clamp(30px, 4vw, 46px);
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--qd-indigo-700);
  padding-top: clamp(30px, 4vw, 46px);
}

.page-about .qd-h2 {
  margin: 0 0 16px;
  font-family: var(--qd-font-serif);
  font-weight: 600;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.24;
  color: var(--qd-sand);
}

.page-about .about-chapter p,
.page-about .about-band p {
  margin: 0 0 14px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--qd-rock);
}

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

.page-about .about-quote {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--qd-teal);
  border-radius: 0 var(--qd-radius-md) var(--qd-radius-md) 0;
  background: linear-gradient(90deg, rgba(53, 224, 196, 0.09), transparent 72%);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--qd-font-serif);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.62;
  color: var(--qd-sand);
}

.page-about .about-quote cite {
  display: block;
  margin-top: 12px;
  font-style: normal;
  font-family: var(--qd-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--qd-teal-600);
}

.page-about .about-steps {
  counter-reset: aboutstep;
  list-style: none;
  margin: 22px 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-steps li {
  counter-increment: aboutstep;
  position: relative;
  padding: 11px 14px 11px 44px;
  border: 1px solid var(--qd-indigo-700);
  border-radius: var(--qd-radius-md);
  background: rgba(23, 34, 74, 0.5);
  font-size: 15px;
  line-height: 1.7;
  color: var(--qd-rock);
}

.page-about .about-steps li::before {
  content: counter(aboutstep, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 11px;
  font-family: var(--qd-font-mono);
  font-size: 13px;
  color: var(--qd-teal);
}

.page-about .about-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border-radius: var(--qd-radius-lg);
  overflow: hidden;
  border: 1px solid var(--qd-indigo-700);
}

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

.page-about .about-figure .qd-media__caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--qd-rock);
  background: rgba(14, 22, 51, 0.72);
}

.page-about .about-band {
  margin: clamp(26px, 4vw, 44px) 0;
  padding: clamp(24px, 4vw, 38px) clamp(18px, 3vw, 30px);
  border: 1px solid var(--qd-indigo-700);
  border-radius: var(--qd-radius-lg);
  background:
    radial-gradient(100% 120% at 100% 0%, rgba(255, 158, 74, 0.13), transparent 58%),
    linear-gradient(180deg, rgba(23, 34, 74, 0.92), rgba(14, 22, 51, 0.86));
}

.page-about .about-band__lead {
  max-width: 40em;
}

.page-about .about-lines {
  position: relative;
  margin-top: 20px;
}

.page-about .about-lines > input.about-filter {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}

.page-about .about-lines__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .about-lines__tags .qd-tag {
  cursor: pointer;
  font-size: 13px;
  padding: 7px 15px;
  border: 1px solid var(--qd-indigo-700);
  border-radius: 999px;
  background: rgba(14, 22, 51, 0.5);
  color: var(--qd-rock);
  transition: background 0.2s var(--qd-ease), color 0.2s var(--qd-ease), border-color 0.2s var(--qd-ease);
}

.page-about #line-all:checked ~ .about-lines__tags [for="line-all"],
.page-about #line-stable:checked ~ .about-lines__tags [for="line-stable"],
.page-about #line-lts:checked ~ .about-lines__tags [for="line-lts"],
.page-about #line-intranet:checked ~ .about-lines__tags [for="line-intranet"] {
  background: var(--qd-teal);
  border-color: var(--qd-teal);
  color: var(--qd-ink);
}

.page-about .about-lines__cards {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-line {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--qd-indigo-700);
  border-radius: var(--qd-radius-md);
  background: rgba(14, 22, 51, 0.62);
}

.page-about .about-line .qd-badge {
  align-self: flex-start;
}

.page-about .about-line__title {
  margin: 0;
  font-family: var(--qd-font-sans);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.35;
  color: var(--qd-sand);
}

.page-about .about-line p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--qd-rock);
}

.page-about .about-line .qd-link-more {
  margin-top: auto;
  font-size: 14px;
  color: var(--qd-teal);
  text-decoration: none;
}

.page-about .about-line .qd-link-more:hover,
.page-about .about-line .qd-link-more:focus-visible {
  color: var(--qd-sand);
}

.page-about #line-stable:checked ~ .about-lines__cards .about-line:not(.about-line--stable),
.page-about #line-lts:checked ~ .about-lines__cards .about-line:not(.about-line--lts),
.page-about #line-intranet:checked ~ .about-lines__cards .about-line:not(.about-line--intranet) {
  display: none;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--qd-teal), var(--qd-orange) 70%, var(--qd-indigo-700));
}

.page-about .about-node {
  position: relative;
  padding: 0 0 22px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--qd-ink);
  border: 1px solid var(--qd-teal);
  box-shadow: 0 0 0 3px rgba(53, 224, 196, 0.12);
}

.page-about .about-node--now::before {
  background: var(--qd-orange);
  border-color: var(--qd-orange);
  box-shadow: 0 0 0 3px rgba(255, 158, 74, 0.18);
}

.page-about .about-node__title {
  margin: 0 0 6px;
  font-family: var(--qd-font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.45;
  color: var(--qd-sand);
}

.page-about .about-node p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--qd-rock);
}

.page-about .about-standard {
  margin: clamp(26px, 4vw, 44px) 0;
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--qd-radius-lg);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(111, 143, 94, 0.16), transparent 62%),
    var(--qd-sand);
  color: var(--qd-ink);
}

.page-about .about-standard__kicker {
  color: var(--qd-teal-600);
}

.page-about .about-standard__title {
  color: var(--qd-ink);
}

.page-about .about-standard__lead {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.8;
  color: #2c3654;
}

.page-about .about-fold {
  border: 1px solid rgba(14, 22, 51, 0.16);
  border-radius: var(--qd-radius-md);
  background: rgba(255, 255, 255, 0.55);
  padding: 14px 16px;
}

.page-about .about-fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 15px;
  color: var(--qd-ink);
}

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

.page-about .about-fold summary::after {
  content: "+";
  font-family: var(--qd-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--qd-teal-600);
}

.page-about .about-fold[open] summary::after {
  content: "−";
}

.page-about .about-fold__list {
  margin: 14px 0 2px;
  padding-left: 20px;
  display: grid;
  gap: 9px;
}

.page-about .about-fold__list li {
  font-size: 14.5px;
  line-height: 1.75;
  color: #2c3654;
}

.page-about .about-standard__tail {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: #2c3654;
}

.page-about .about-standard__link {
  color: var(--qd-teal-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-standard__link:hover,
.page-about .about-standard__link:focus-visible {
  color: var(--qd-ink);
}

.page-about .about-outro {
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-outro__figure {
  position: relative;
  margin: 0 0 clamp(22px, 3vw, 32px);
  border-radius: var(--qd-radius-lg);
  overflow: hidden;
  border: 1px solid var(--qd-indigo-700);
  opacity: 0.9;
}

.page-about .about-outro__figure img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-outro__title {
  margin-bottom: 18px;
}

.page-about .about-outro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-outro__card {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--qd-indigo-700);
  border-radius: var(--qd-radius-md);
  background: rgba(23, 34, 74, 0.55);
  text-decoration: none;
  transition: border-color 0.24s var(--qd-ease), transform 0.24s var(--qd-ease);
}

.page-about .about-outro__card:hover,
.page-about .about-outro__card:focus-visible {
  border-color: var(--qd-teal);
  transform: translateY(-2px);
}

.page-about .about-outro__num {
  font-size: 12px;
  color: var(--qd-orange);
}

.page-about .about-outro__label {
  font-family: var(--qd-font-sans);
  font-weight: 700;
  font-size: 17px;
  color: var(--qd-sand);
}

.page-about .about-outro__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--qd-rock);
}

.page-about #origin,
.page-about #team,
.page-about #lines,
.page-about #timeline,
.page-about #standard {
  scroll-margin-top: 96px;
}

@media (min-width: 700px) {
  .page-about .about-lines__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 920px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
  }

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

  .page-about .about-band {
    margin-left: calc(-1 * clamp(16px, 2vw, 28px));
    margin-right: calc(-1 * clamp(16px, 2vw, 28px));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-lines__tags .qd-tag,
  .page-about .about-outro__card {
    transition: none;
  }

  .page-about .about-outro__card:hover,
  .page-about .about-outro__card:focus-visible {
    transform: none;
  }
}
<<<END>>>