.page-about {
  --about-line: rgba(201, 168, 106, 0.26);
  --about-num: rgba(201, 168, 106, 0.2);
  --about-card: rgba(6, 35, 27, 0.52);
  background: linear-gradient(180deg, rgba(6, 35, 27, 0.22) 0%, transparent 320px);
}

.page-about .about-hero {
  position: relative;
  padding: var(--sp-5) 0 var(--sp-7);
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(ellipse 520px 300px at 82% 12%, rgba(201, 168, 106, 0.14), transparent 60%),
    radial-gradient(ellipse 420px 260px at 6% 68%, rgba(6, 35, 27, 0.72), transparent 55%);
}

.page-about .about-hero__inner {
  padding-top: var(--sp-4);
}

.page-about .about-hero__grid {
  margin-top: var(--sp-6);
  display: grid;
  gap: var(--sp-6);
}

.page-about .about-hero__main h1 {
  margin: var(--sp-3) 0 var(--sp-4);
  font-family: var(--font-heading);
  font-size: clamp(34px, 8vw, 58px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--color-ivory);
}

.page-about .about-hero__lead {
  max-width: 58ch;
  margin: 0 0 var(--sp-5);
  font-size: clamp(15px, 2.4vw, 18px);
  line-height: 1.75;
  color: var(--color-mist-green);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.page-about .about-hero__aside {
  position: relative;
  padding: var(--sp-5);
  border-left: 2px solid var(--color-gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .about-hero__aside-label {
  margin: 0 0 var(--sp-2);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--color-mist-green);
}

.page-about .about-hero__aside-id {
  margin: 0;
  font-family: var(--font-data);
  font-size: 24px;
  line-height: 1.2;
  color: var(--color-bright-gold);
}

.page-about .about-hero__aside-divider {
  height: 1px;
  margin: var(--sp-3) 0;
  border: 0;
  background: linear-gradient(90deg, var(--color-gold), transparent);
}

.page-about .about-hero__aside-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--color-ivory);
}

.page-about .about-chapter {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid rgba(201, 168, 106, 0.14);
  scroll-margin-top: calc(var(--header-h) + var(--sp-4));
}

.page-about #craft,
.page-about #evolution {
  background: linear-gradient(180deg, rgba(6, 35, 27, 0.34), transparent);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: var(--sp-6);
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
}

.page-about .about-chapter__num {
  font-family: var(--font-data);
  font-size: clamp(52px, 14vw, 108px);
  font-weight: 800;
  line-height: 0.85;
  letter-spacing: -0.04em;
  color: var(--about-num);
  -webkit-text-stroke: 1px rgba(201, 168, 106, 0.34);
  user-select: none;
}

.page-about .about-chapter__note {
  writing-mode: vertical-rl;
  align-self: stretch;
  margin-top: var(--sp-1);
  padding-right: var(--sp-2);
  border-right: 1px solid rgba(201, 168, 106, 0.5);
  font-family: var(--font-label);
  font-size: 13px;
  letter-spacing: 0.34em;
  color: var(--color-gold);
  opacity: 0.78;
}

.page-about .about-chapter__content {
  position: relative;
  padding: var(--sp-5);
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: 0 var(--radius) var(--radius) var(--radius);
}

.page-about .about-chapter__content::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 14px;
  width: 88px;
  height: 8px;
  background: linear-gradient(90deg, rgba(201, 168, 106, 0.85), rgba(201, 168, 106, 0.35));
  border-radius: 4px 4px 0 0;
}

.page-about .about-chapter__text {
  max-width: 72ch;
}

.page-about .about-chapter__text h2 {
  margin: var(--sp-2) 0 var(--sp-3);
  font-family: var(--font-heading);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 800;
  line-height: 1.22;
  color: var(--color-ivory);
}

.page-about .about-chapter__text p {
  margin: 0 0 var(--sp-3);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-mist-green);
}

.page-about .about-chapter__text a {
  color: var(--color-bright-gold);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(201, 168, 106, 0.45);
}

.page-about .about-chapter__figure {
  margin: var(--sp-5) 0 0;
}

.page-about .about-chapter__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(201, 168, 106, 0.22);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-about .about-chapter__figure figcaption {
  margin-top: var(--sp-2);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--color-mist-green);
}

.page-about .about-chapter__figure--vertical img {
  max-height: 440px;
  object-fit: cover;
  object-position: center top;
}

.page-about .about-process {
  display: grid;
  gap: var(--sp-4);
  margin: var(--sp-5) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-process__item {
  position: relative;
  padding: var(--sp-4) var(--sp-5);
  background: rgba(11, 59, 46, 0.42);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-process__item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-gold), transparent 82%);
}

.page-about .about-process__num {
  display: inline-block;
  margin-bottom: var(--sp-2);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-gold);
}

.page-about .about-process__item h3 {
  margin: 0 0 var(--sp-1);
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ivory);
}

.page-about .about-process__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-mist-green);
}

.page-about .about-stats {
  display: grid;
  gap: var(--sp-4);
  margin: var(--sp-6) 0 0;
}

.page-about .about-stats__card {
  position: relative;
  padding: var(--sp-5);
  background: linear-gradient(135deg, rgba(11, 59, 46, 0.72), rgba(6, 35, 27, 0.6));
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
}

.page-about .about-stats__card::before {
  content: "";
  position: absolute;
  inset: 6px 6px auto auto;
  width: 14px;
  height: 14px;
  border-top: 2px solid rgba(201, 168, 106, 0.5);
  border-right: 2px solid rgba(201, 168, 106, 0.5);
  border-radius: 0 var(--radius-sm) 0 0;
}

.page-about .about-stats__card--accent {
  border-color: rgba(201, 168, 106, 0.55);
  background: linear-gradient(135deg, rgba(201, 168, 106, 0.2), rgba(11, 59, 46, 0.52));
}

.page-about .about-stats__value {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-data);
  font-size: clamp(30px, 7vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-bright-gold);
}

.page-about .about-stats__label {
  margin: 0 0 var(--sp-1);
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-ivory);
}

.page-about .about-stats__unit {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-mist-green);
}

.page-about .about-versions {
  margin-top: var(--sp-6);
}

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

.page-about .about-versions__list::before {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 15px;
  width: 2px;
  background: repeating-linear-gradient(180deg, rgba(201, 168, 106, 0.6) 0 4px, transparent 4px 12px);
}

.page-about .about-versions__item {
  position: relative;
  display: flex;
  gap: var(--sp-4);
  margin-bottom: var(--sp-5);
}

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

.page-about .about-versions__node {
  position: relative;
  z-index: 1;
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  margin-top: 2px;
  border-radius: 50%;
  background: var(--color-field-night);
}

.page-about .about-versions__item:last-child .about-versions__node {
  animation: aboutNodePulse 2.4s ease-in-out infinite;
}

@keyframes aboutNodePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(242, 213, 146, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(242, 213, 146, 0); }
}

.page-about .about-versions__card {
  flex: 1;
  padding: var(--sp-4) var(--sp-5);
  background: rgba(11, 59, 46, 0.4);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), transform var(--transition);
}

.page-about .about-versions__card:hover,
.page-about .about-versions__card:focus-within {
  border-color: rgba(201, 168, 106, 0.6);
  transform: translateX(4px);
}

.page-about .about-versions__card h3 {
  margin: var(--sp-2) 0 var(--sp-1);
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-ivory);
}

.page-about .about-versions__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-mist-green);
}

.page-about .about-updates {
  display: grid;
  gap: var(--sp-4);
  margin: var(--sp-6) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-updates__item {
  display: flex;
  gap: var(--sp-4);
  align-items: flex-start;
  padding: var(--sp-4) var(--sp-5);
  background: rgba(11, 59, 46, 0.38);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
}

.page-about .about-updates__item .tag {
  flex-shrink: 0;
  margin-top: 2px;
}

.page-about .about-updates__item h3 {
  margin: 0 0 var(--sp-1);
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ivory);
}

.page-about .about-updates__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-mist-green);
}

.page-about .about-cta {
  padding: var(--sp-8) 0 var(--sp-9);
  scroll-margin-top: calc(var(--header-h) + var(--sp-4));
}

.page-about .about-cta__inner {
  padding: var(--sp-6) var(--sp-5);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
}

.page-about .about-cta__inner h2 {
  margin: var(--sp-3) 0;
  font-family: var(--font-heading);
  font-size: clamp(21px, 4vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--color-ivory);
}

.page-about .about-cta__inner > p {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-mist-green);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

@media (min-width: 640px) {
  .page-about .about-process {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-stats {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: var(--sp-6);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
    gap: var(--sp-7);
  }

  .page-about .about-chapter {
    padding: var(--sp-8) 0;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: var(--sp-7);
  }

  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-4);
    padding-top: var(--sp-2);
  }

  .page-about .about-chapter__num {
    font-size: clamp(88px, 10vw, 124px);
  }

  .page-about .about-chapter__note {
    margin-top: var(--sp-2);
    margin-left: var(--sp-3);
    padding-left: var(--sp-2);
    padding-right: 0;
    border-right: 0;
    border-left: 1px solid rgba(201, 168, 106, 0.5);
  }

  .page-about .about-chapter__figure--vertical {
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-chapter__figure--vertical img {
    max-height: 540px;
  }

  .page-about .about-cta__inner {
    padding: var(--sp-8);
    text-align: center;
  }

  .page-about .about-cta__inner > p {
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-cta__links {
    justify-content: center;
  }
}