.page-about {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-light-bg);
  overflow-x: hidden;
}
.page-about .section-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .16em;
  color: var(--color-gold);
}
.page-about .section-index::after {
  content: "";
  width: 42px;
  height: 2px;
  background: currentColor;
  transform: translateY(1px);
}
.page-about .about-section--dark .section-index::after,
.page-about .about-section--tech .section-index::after {
  background: var(--color-gold);
}
.page-about .about-hero .breadcrumb a {
  color: rgba(255, 255, 255, .72);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .about-hero .breadcrumb a:hover {
  color: var(--color-gold-light);
}
.page-about .about-hero .breadcrumb__sep {
  color: rgba(255, 255, 255, .4);
  margin: 0 6px;
}
.page-about .about-hero .breadcrumb span[aria-current="page"] {
  color: var(--color-gold-light);
}

.about-hero {
  position: relative;
  padding: 36px 0 52px;
  color: var(--color-white);
  background:
    radial-gradient(ellipse at 88% 18%, rgba(212, 164, 42, .16) 0%, transparent 55%),
    linear-gradient(118deg, var(--color-bg) 0%, var(--color-bg-deep) 72%, rgba(212, 164, 42, .12) 100%);
  overflow: hidden;
}
.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(212, 164, 42, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 164, 42, .05) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}
.about-hero__grid {
  position: relative;
  z-index: 1;
}
.about-hero__title-wrap {
  margin-top: 30px;
  max-width: 46rem;
}
.about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 5vw, 3.35rem);
  line-height: 1.16;
  letter-spacing: .02em;
  color: var(--color-white);
}
.about-hero__title em {
  font-style: normal;
  color: var(--color-gold);
}
.about-hero__lead {
  margin: 20px 0 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(232, 240, 254, .85);
  max-width: 40em;
}
.about-hero__toc {
  margin-top: 36px;
  border-left: 2px solid var(--color-gold);
  padding-left: 20px;
}
.about-hero__toc-label {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--color-gold-light);
  text-transform: uppercase;
}
.about-hero__toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.about-hero__toc-list li + li {
  margin-top: 10px;
}
.about-hero__toc-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: rgba(255, 255, 255, .85);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: .95rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
.about-hero__toc-list a:hover {
  color: var(--color-gold-light);
  border-bottom-color: rgba(212, 164, 42, .55);
}
.about-hero__toc-num {
  font-family: var(--font-data);
  font-size: .82rem;
  font-weight: 600;
  color: var(--color-gold);
}
.about-hero__mark {
  display: none;
}
.about-keywords {
  position: relative;
  background: var(--color-bg);
  border-top: 1px solid rgba(212, 164, 42, .32);
  border-bottom: 1px solid rgba(212, 164, 42, .32);
  padding: 14px 0;
  z-index: 2;
}
.about-keywords__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  justify-content: space-between;
}
.about-keywords__item {
  font-family: var(--font-data);
  font-size: .8rem;
  letter-spacing: .04em;
  color: rgba(232, 240, 254, .72);
  white-space: nowrap;
}
.about-keywords__item::before {
  content: "◆";
  color: var(--color-gold);
  margin-right: 8px;
  font-size: .55rem;
  vertical-align: 2px;
}

.about-section {
  position: relative;
  padding: 56px 0;
}
.about-section--light {
  background:
    linear-gradient(rgba(11, 27, 63, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 27, 63, .035) 1px, transparent 1px),
    var(--color-light-bg);
  background-size: 32px 32px, 32px 32px, auto;
}
.about-section--dark {
  background: var(--color-bg);
  color: rgba(232, 240, 254, .85);
}
.about-section--milestones {
  background:
    linear-gradient(rgba(232, 240, 254, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 240, 254, .03) 1px, transparent 1px),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-deep) 100%);
  background-size: 28px 28px, 28px 28px, auto;
}
.about-section--milestones::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 260px;
  height: 2px;
  background: repeating-linear-gradient(90deg, rgba(212, 164, 42, .5) 0 6px, transparent 6px 12px);
}
.about-section--tech {
  background:
    radial-gradient(circle at 82% 8%, rgba(212, 164, 42, .15) 0%, transparent 42%),
    linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-deep) 78%);
  color: rgba(232, 240, 254, .85);
}
.about-section__grid {
  display: grid;
  gap: 30px;
}
.about-section__head {
  max-width: 460px;
}
.about-section__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  line-height: 1.28;
}
.about-section--light .about-section__title {
  color: var(--color-bg);
}
.about-section--dark .about-section__title,
.about-section--tech .about-section__title {
  color: var(--color-white);
}
.about-section__head-note {
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: .93rem;
  line-height: 1.7;
}
.about-section--light .about-section__head-note {
  color: rgba(26, 42, 58, .72);
}
.about-section--dark .about-section__head-note,
.about-section--tech .about-section__head-note {
  color: rgba(232, 240, 254, .65);
}
.about-section__body p {
  font-family: var(--font-body);
  font-size: .96rem;
  line-height: 1.8;
  margin: 0 0 14px;
}
.about-section--light .about-section__body p {
  color: rgba(26, 42, 58, .88);
}
.about-section--dark .about-section__body p,
.about-section--tech .about-section__body p {
  color: rgba(232, 240, 254, .82);
}

.about-split {
  display: grid;
  gap: 26px;
}
.about-split__figure {
  margin: 0;
}
.about-split__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 18px 44px rgba(11, 27, 63, .2);
}
.about-split__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: .78rem;
  color: rgba(26, 42, 58, .6);
}

.milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.milestone-list::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, rgba(212, 164, 42, .35) 0%, rgba(212, 164, 42, .8) 55%, rgba(44, 154, 110, .9) 100%);
}
.milestone-card {
  position: relative;
  padding: 0 0 42px 64px;
}
.milestone-card:last-child {
  padding-bottom: 0;
}
.milestone-card::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 26px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg-deep);
  border: 4px solid var(--color-gold);
  box-shadow: 0 0 0 4px rgba(212, 164, 42, .18), 0 0 14px rgba(212, 164, 42, .35);
}
.milestone-card__version {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.28rem;
  line-height: 1.1;
  color: var(--color-gold);
}
.milestone-card__meta {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 10px;
  font-family: var(--font-data);
  font-size: .76rem;
  letter-spacing: .02em;
  color: var(--color-green);
  background: rgba(44, 154, 110, .1);
  border: 1px solid rgba(44, 154, 110, .22);
  border-radius: 999px;
}
.milestone-card__title {
  margin: 16px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.4;
  color: var(--color-white);
}
.milestone-card__desc {
  margin: 0;
  font-family: var(--font-body);
  font-size: .93rem;
  line-height: 1.78;
  color: rgba(232, 240, 254, .75);
}

.about-tech {
  display: grid;
  gap: 28px;
}
.about-tech__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}
.about-tech__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.about-tech__figcap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  font-family: var(--font-data);
  font-size: .72rem;
  color: rgba(255, 255, 255, .55);
  text-shadow: 0 1px 6px rgba(0, 0, 0, .6);
}
.about-tech__glass {
  position: absolute;
  right: 14px;
  bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 12px 16px;
  border-radius: var(--radius);
  border-left: 3px solid var(--color-gold);
  box-shadow: 0 10px 28px rgba(11, 27, 63, .35);
}
.about-tech__pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 0 0 rgba(44, 154, 110, .55);
  animation: page-about-pulse 2s infinite;
}
.about-tech__glass-meta {
  display: flex;
  flex-direction: column;
}
.about-tech__frequency {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.45rem;
  line-height: 1;
  color: var(--color-white);
}
.about-tech__label {
  margin-top: 4px;
  font-family: var(--font-body);
  font-size: .74rem;
  color: rgba(232, 240, 254, .75);
}
.about-tech__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  line-height: 1.35;
  color: var(--color-white);
}
.about-tech__list {
  list-style: none;
  margin: 22px 0;
  padding: 0;
  border-top: 1px solid rgba(212, 164, 42, .28);
}
.about-tech__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  font-family: var(--font-body);
  font-size: .93rem;
  line-height: 1.65;
  color: rgba(232, 240, 254, .82);
}
.about-tech__num {
  font-family: var(--font-data);
  font-weight: 600;
  font-size: .84rem;
  color: var(--color-gold);
}

.about-scale {
  display: grid;
  gap: 24px;
}
.about-scale__figures {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.about-stat {
  background: var(--color-white);
  border-left: 4px solid var(--color-gold);
  padding: 18px 18px 16px;
  box-shadow: 0 8px 22px rgba(11, 27, 63, .08);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.about-stat__num {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  line-height: 1.1;
  color: var(--color-bg);
}
.about-stat__label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: .88rem;
  color: rgba(26, 42, 58, .72);
}
.about-scale__heading {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--color-bg);
}
.about-scale__map {
  margin: 0;
}
.about-scale__map img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 14px 34px rgba(11, 27, 63, .14);
}
.about-scale__map figcaption {
  margin-top: 8px;
  font-family: var(--font-data);
  font-size: .78rem;
  color: rgba(26, 42, 58, .58);
}
.about-cert {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}
.about-cert__badge {
  background: var(--color-white);
  border: 1px solid rgba(212, 164, 42, .35);
  border-radius: var(--radius);
  padding: 18px 16px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(11, 27, 63, .07);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.about-cert__badge:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(212, 164, 42, .2);
  border-color: var(--color-gold);
}
.about-cert__mark {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.55rem;
  color: var(--color-bg);
}
.about-cert__name {
  display: block;
  margin-top: 5px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .96rem;
  color: var(--color-gold);
}
.about-cert__desc {
  display: block;
  margin-top: 3px;
  font-family: var(--font-body);
  font-size: .84rem;
  color: rgba(26, 42, 58, .68);
}
.about-cert__note {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.75;
  color: rgba(26, 42, 58, .78);
  background: rgba(212, 164, 42, .08);
  border-left: 3px solid var(--color-gold);
  padding: 14px 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.about-next {
  background: var(--color-bg-deep);
  color: var(--color-white);
  padding: 58px 0;
  position: relative;
}
.about-next::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: repeating-linear-gradient(90deg, rgba(212, 164, 42, .45) 0 8px, transparent 8px 16px);
}
.about-next__inner {
  display: grid;
  gap: 24px;
}
.about-next__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.3;
  color: var(--color-white);
}
.about-next__text p {
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(232, 240, 254, .72);
  max-width: 40em;
}
.about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

@keyframes page-about-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(44, 154, 110, .5);
  }
  70% {
    box-shadow: 0 0 0 12px rgba(44, 154, 110, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(44, 154, 110, 0);
  }
}

@media (min-width: 768px) {
  .about-hero {
    padding: 40px 0 60px;
  }
  .about-hero__grid {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
  }
  .about-hero .breadcrumb {
    grid-column: 1 / -1;
  }
  .about-hero__toc {
    margin-top: 0;
    align-self: start;
  }
  .about-section {
    padding: 72px 0;
  }
  .about-section__grid {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 40px;
  }
  .about-section__head {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }
  .about-split {
    grid-template-columns: 1.15fr .85fr;
    align-items: start;
  }
  .about-split__figure {
    margin-top: 8px;
  }
  .about-tech {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 36px;
    align-items: center;
  }
  .about-scale__figures {
    grid-template-columns: repeat(4, 1fr);
  }
  .about-cert {
    grid-template-columns: repeat(3, 1fr);
  }
  .about-cert__note {
    grid-column: 1 / -1;
  }
  .about-next__inner {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
  .about-next__links {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .about-hero {
    padding: 48px 0 72px;
  }
  .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
  }
  .about-hero__mark {
    display: block;
    position: absolute;
    right: 1%;
    bottom: 4%;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: clamp(4.5rem, 11vw, 10rem);
    line-height: 1;
    color: rgba(212, 164, 42, .12);
    letter-spacing: .02em;
    pointer-events: none;
    user-select: none;
    z-index: 0;
  }
  .about-hero__title-wrap {
    margin-top: 44px;
  }
  .about-keywords {
    padding: 16px 0;
  }
  .about-section__grid {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 56px;
  }
  .about-section--tech::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 420px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
    opacity: .5;
  }
  .milestone-list::before {
    left: 186px;
  }
  .milestone-card {
    display: grid;
    grid-template-columns: 170px 58px minmax(0, 1fr);
    gap: 0;
    padding: 0 40px 48px 0;
  }
  .milestone-card::before {
    left: 174px;
    top: 30px;
  }
  .milestone-card__head {
    grid-column: 1;
  }
  .milestone-card__content {
    grid-column: 3;
  }
  .about-tech {
    gap: 48px;
  }
  .about-tech__figure {
    min-height: 100%;
  }
  .about-tech__figure img {
    height: 100%;
    min-height: 340px;
    object-fit: cover;
  }
  .about-next {
    padding: 72px 0;
  }
}