.page-about {
  --grid-line: rgba(30, 58, 95, 0.5);
  --neon-soft: rgba(57, 255, 20, 0.12);
  --orange-soft: rgba(255, 69, 0, 0.16);
  position: relative;
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--off-white);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.7;
}

.page-about .breadcrumbs {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 20px 0;
}

.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

.page-about .breadcrumbs__item {
  display: inline-flex;
  align-items: center;
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 10px;
  color: var(--muted);
}

.page-about .breadcrumbs__link {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .breadcrumbs__link:hover {
  color: var(--neon);
}

.page-about .breadcrumbs__current {
  color: var(--off-white);
}

.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 44px 20px 64px;
}

.page-about .about-hero__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-hero__meta::before {
  content: "";
  width: 28px;
  height: 3px;
  flex: 0 0 auto;
  background: linear-gradient(90deg, var(--neon), transparent);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-about .about-hero__title-sep {
  display: block;
  margin: 4px 0;
  color: var(--neon);
  line-height: 1;
}

.page-about .about-hero__title-sub {
  display: block;
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.05rem, 2.4vw, 1.7rem);
  color: var(--off-white);
  letter-spacing: 0;
}

.page-about .about-hero__lead {
  max-width: 36em;
  margin: 0 0 28px;
  font-size: 1rem;
  color: var(--muted);
}

.page-about .hero-link {
  color: var(--neon);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 20, 0.4);
  transition: border-color 0.2s var(--ease);
}

.page-about .hero-link:hover {
  border-bottom-color: var(--neon);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-hero__stat {
  position: relative;
  min-width: 0;
  padding: 14px 10px;
  background: linear-gradient(135deg, var(--bg-navy), rgba(17, 42, 74, 0.4));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.page-about .about-hero__stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 2rem);
  color: var(--neon);
  line-height: 1.1;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 4px;
  font-size: 0.75rem;
  color: var(--muted);
}

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  align-self: center;
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  top: -14px;
  right: -14px;
  width: 72%;
  height: 72%;
  border-top: 2px solid var(--neon);
  border-right: 2px solid var(--neon);
  opacity: 0.4;
  pointer-events: none;
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--orange), transparent);
  opacity: 0.7;
  pointer-events: none;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  padding: 4px;
  background: var(--bg-navy);
  filter: saturate(1.25) contrast(1.1);
}

.page-about .about-layout {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

.page-about .about-index__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow-x: auto;
  padding: 20px 0 8px;
  scrollbar-width: none;
}

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

.page-about .about-index__label {
  flex: 0 0 auto;
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-index__link:hover {
  color: var(--neon);
  border-color: var(--neon);
}

.page-about .about-index__link.is-active,
.page-about .about-index__link[aria-current="true"],
.page-about .about-index__inner.is-active .about-index__name {
  color: var(--neon);
}

.page-about .about-index__link[aria-current="true"],
.page-about .about-index__link.is-active {
  border-color: var(--neon);
  background: var(--neon-soft);
}

.page-about .about-index__link.is-active .about-index__num,
.page-about .about-index__link[aria-current="true"] .about-index__num {
  color: var(--neon);
}

.page-about .about-index__item {
  list-style: none;
}

.page-about .about-content {
  display: grid;
  gap: 56px;
  min-width: 0;
}

.page-about .about-section {
  position: relative;
  scroll-margin-top: calc(var(--header-h) + 30px);
}

.page-about .section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .section-header__index {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--neon);
  line-height: 1;
}

.page-about .section-header__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.2;
}

.page-about .section-header__line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.page-about .about-section__intro {
  max-width: 42em;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.page-about .mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .mission-principle {
  position: relative;
  padding: 28px 22px 24px;
  background: linear-gradient(145deg, var(--bg-navy), rgba(17, 42, 74, 0.6));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .mission-principle:hover {
  border-color: var(--neon);
  transform: translateY(-3px);
}

.page-about .mission-principle__key {
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: rgba(57, 255, 20, 0.28);
  line-height: 1;
}

.page-about .mission-principle h3 {
  margin: 0 40px 10px 0;
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.4;
}

.page-about .mission-principle p {
  margin: 0 0 14px;
  font-size: 0.9375rem;
  color: var(--muted);
}

.page-about .text-link {
  color: var(--neon);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 20, 0.4);
  transition: border-color 0.2s var(--ease);
}

.page-about .text-link:hover {
  border-bottom-color: var(--neon);
}

.page-about .mission-quote {
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  margin: 0;
  padding: 28px 24px;
  background: var(--wine);
  border: 0;
}

.page-about .mission-quote::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.14), transparent 60%);
  pointer-events: none;
}

.page-about .mission-quote blockquote {
  margin: 0;
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 1.3rem;
  line-height: 1.45;
  color: var(--off-white);
}

.page-about .mission-quote figcaption {
  margin-top: 10px;
  font-size: 0.8125rem;
  color: rgba(240, 244, 248, 0.75);
}

.page-about .about-section--journey {
  padding: 32px 20px;
  background: linear-gradient(135deg, rgba(114, 47, 55, 0.28), rgba(17, 42, 74, 0.4));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-about .journey-list {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .journey-node {
  position: relative;
}

.page-about .journey-node__version {
  display: inline-block;
  padding: 4px 12px;
  background: var(--orange);
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-about .journey-node__card {
  position: relative;
  height: 100%;
  padding: 18px 16px;
  background: var(--bg-navy);
  border: 1px solid var(--line);
  border-top: 3px solid var(--neon);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .journey-node__card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  line-height: 1.4;
}

.page-about .journey-node__card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.page-about .journey-figure {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .journey-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  padding: 4px;
  background: var(--bg-navy);
}

.page-about .journey-figure figcaption {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-about .journey-figure figcaption::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .about-section--scale {
  padding: 28px 0;
}

.page-about .scale-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.page-about .scale-card {
  padding: 20px 14px;
  background: linear-gradient(160deg, var(--bg-navy), rgba(13, 33, 54, 0.9));
  border: 1px solid var(--line);
  border-top: 3px solid var(--neon);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .scale-card__value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  color: var(--neon);
  line-height: 1.1;
}

.page-about .scale-card__label {
  display: block;
  margin-top: 8px;
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-about .scale-note {
  margin: 24px 0 0;
  padding: 14px 18px;
  background: var(--neon-soft);
  border-left: 3px solid var(--neon);
  font-size: 0.875rem;
  color: var(--off-white);
}

.page-about .about-section--certification {
  padding: 32px 20px;
  background: linear-gradient(135deg, rgba(75, 0, 130, 0.5), rgba(17, 42, 74, 0.35));
  border-left: 3px solid var(--indigo);
}

.page-about .cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .cert-card {
  position: relative;
  padding: 24px 20px 20px;
  background: rgba(17, 42, 74, 0.75);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .cert-card:hover {
  border-color: var(--neon);
  background: rgba(17, 42, 74, 0.92);
}

.page-about .cert-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  margin-bottom: 14px;
  background: var(--indigo);
  color: var(--off-white);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.page-about .cert-card__icon svg {
  display: block;
}

.page-about .cert-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  line-height: 1.4;
}

.page-about .cert-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.page-about .cert-card__tip {
  display: block;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 0.8125rem;
  color: var(--neon);
}

.page-about .cert-note {
  margin: 20px 0 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .team-lead {
  margin: 0 0 24px;
  font-size: 1.05rem;
  color: var(--off-white);
}

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

.page-about .team-list li {
  position: relative;
  padding: 18px 16px 16px 54px;
  background: var(--bg-navy);
  border-left: 3px solid var(--line);
  transition: border-left-color 0.2s var(--ease);
}

.page-about .team-list li:hover {
  border-left-color: var(--orange);
}

.page-about .team-list__index {
  position: absolute;
  left: 14px;
  top: 18px;
  font-family: var(--font-display);
  color: var(--orange);
  font-size: 1.1rem;
  line-height: 1;
}

.page-about .team-list h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 0.9375rem;
}

.page-about .team-list p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.page-about .team-visual {
  margin: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .team-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  padding: 4px;
  background: var(--bg-navy);
}

.page-about .team-visual figcaption {
  font-size: 0.8125rem;
  color: var(--muted);
  text-align: right;
}

@media (min-width: 720px) {
  .page-about .about-hero {
    padding-top: 56px;
  }

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

  .page-about .mission-quote {
    grid-column: span 2;
  }

  .page-about .journey-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .scale-band {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .cert-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .about-section--journey,
  .page-about .about-section--certification {
    padding: 40px 28px;
  }
}

@media (hover: hover) {
  .page-about .cert-card__tip {
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  }

  .page-about .cert-card:hover .cert-card__tip {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 860px) {
  .page-about .journey-list {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .journey-list::before {
    content: "";
    position: absolute;
    left: 12.5%;
    right: 12.5%;
    top: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--neon), var(--orange), var(--neon));
    opacity: 0.35;
    pointer-events: none;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
    gap: 56px;
    align-items: center;
    padding: 84px 48px 96px;
  }

  .page-about .about-hero__lead {
    font-size: 1.05rem;
  }

  .page-about .about-hero__stat {
    padding: 16px 14px;
  }

  .page-about .about-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 56px;
    padding: 32px 48px 120px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    height: fit-content;
    max-height: calc(100vh - var(--header-h) - 56px);
    overflow: auto;
  }

  .page-about .about-index__inner {
    display: block;
    padding: 18px 0 0 18px;
    border-left: 1px solid var(--line);
  }

  .page-about .about-index__inner::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 0;
    width: 7px;
    height: 7px;
    background: var(--neon);
    transform: rotate(45deg);
  }

  .page-about .about-index__label {
    margin: 0 0 14px;
  }

  .page-about .about-index__list {
    display: grid;
    gap: 0;
  }

  .page-about .about-index__link {
    position: relative;
    display: block;
    padding: 8px 0 8px 16px;
    border: 0;
    border-left: 2px solid transparent;
    clip-path: none;
    white-space: normal;
    border-radius: 0;
    background: transparent;
    font-size: 0.9375rem;
  }

  .page-about .about-index__link:hover {
    border-left-color: var(--neon);
    background: linear-gradient(90deg, var(--neon-soft), transparent);
  }

  .page-about .about-index__link.is-active,
  .page-about .about-index__link[aria-current="true"] {
    border-left-color: var(--neon);
    background: linear-gradient(90deg, var(--neon-soft), transparent);
  }

  .page-about .about-index__num {
    display: inline-block;
    min-width: 2em;
    color: var(--muted);
    font-family: var(--font-display);
    font-size: 0.8125rem;
  }

  .page-about .about-index__link.is-active .about-index__num,
  .page-about .about-index__link[aria-current="true"] .about-index__num {
    color: var(--neon);
  }

  .page-about .about-content {
    gap: 80px;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .scale-band {
    grid-template-columns: repeat(6, 1fr);
  }
}