.page-about {
  --about-green: #0f2d24;
  --about-deep: #1a2332;
  --about-deep-2: #243348;
  --about-soft: #e8ecef;
  --about-radius: 14px;
  --about-shadow: 0 10px 24px rgba(10, 18, 30, .12);
  --about-shadow-sm: 0 2px 6px rgba(10, 18, 30, .08);
}

.page-about .about-hero {
  background: linear-gradient(140deg, #0b1422 0%, var(--dark-blue) 58%, var(--green) 135%);
  color: var(--white);
  padding: 34px 0 58px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(124, 77, 255, .32), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 2;
}

.page-about .about-hero .breadcrumb-link {
  color: rgba(255, 255, 255, .7);
}

.page-about .about-hero .breadcrumb-link:hover,
.page-about .about-hero .breadcrumb-link:focus {
  color: var(--white);
}

.page-about .about-hero .breadcrumb-current {
  color: var(--yellow);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 28px;
  margin-top: 30px;
}

.page-about .about-hero-kicker {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--yellow);
  margin: 0;
}

.page-about .about-hero-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 5.2vw, 56px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: .01em;
  margin: 14px 0 18px;
  max-width: 16em;
}

.page-about .about-hero-desc {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .82);
  max-width: 56em;
  margin: 0;
}

.page-about .about-hero-card {
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--about-radius);
  padding: 22px 20px;
  backdrop-filter: blur(8px);
  align-self: end;
}

.page-about .about-hero-card-label {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .6);
  margin: 0 0 14px;
}

.page-about .about-hero-status {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero-status-note {
  font-size: 12px;
  color: rgba(255, 255, 255, .68);
  margin: 0;
}

.page-about .about-stats {
  background: var(--dark-blue);
  color: var(--white);
  padding: 56px 0 72px;
  position: relative;
  overflow: hidden;
}

.page-about .about-stats-bg {
  position: absolute;
  right: 16px;
  bottom: 12px;
  width: 240px;
  opacity: .16;
  pointer-events: none;
}

.page-about .about-stats-bg img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  max-width: 300px;
}

.page-about .about-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: 28px;
}

.page-about .section-kicker {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dark-blue);
  margin: 0;
}

.page-about .about-stats .section-kicker,
.page-about .about-versions .section-kicker,
.page-about .about-devices .section-kicker {
  color: var(--yellow);
}

.page-about .section-title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 900;
  line-height: 1.1;
  margin: 0;
}

.page-about .section-note {
  font-size: 12px;
  color: var(--muted);
  margin: 0;
}

.page-about .about-stats .section-note,
.page-about .about-versions .section-note,
.page-about .about-devices .section-note {
  color: rgba(255, 255, 255, .7);
}

.page-about .about-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  position: relative;
  z-index: 2;
}

.page-about .about-stat-card {
  border-radius: var(--about-radius);
  padding: 20px 18px;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.page-about .about-stat-label {
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin: 0;
}

.page-about .about-stat-num {
  font-family: var(--font-display);
  font-size: clamp(56px, 10vw, 104px);
  font-weight: 900;
  line-height: 1;
  margin: 8px 0 4px;
  letter-spacing: -.02em;
}

.page-about .about-stat-unit {
  font-size: .36em;
  font-weight: 700;
  margin-left: 6px;
  opacity: .75;
}

.page-about .about-stat-sub {
  font-size: 12px;
  opacity: .84;
  line-height: 1.6;
  margin: 0;
}

.page-about .about-stat-total {
  background: var(--orange);
  color: var(--white);
}

.page-about .about-stat-cat {
  background: var(--cyan);
  color: #10222b;
}

.page-about .about-stat-secondary {
  background: var(--purple);
  color: var(--white);
}

.page-about .about-stat-tag {
  background: var(--yellow);
  color: var(--ink);
}

.page-about .about-stats-foot {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding-top: 20px;
}

.page-about .about-stats-foot p {
  margin: 0;
  font-size: 12px;
  color: rgba(255, 255, 255, .7);
}

.page-about .about-tree {
  background: var(--bg);
  padding: 56px 0 64px;
}

.page-about .about-tree-wrap {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--about-shadow);
  padding: 16px;
}

.page-about .about-tree-svg {
  display: block;
  width: 100%;
  min-width: 860px;
  height: auto;
}

.page-about .about-tree-svg text {
  font-family: var(--font-mono);
}

.page-about .about-versions {
  background: var(--green);
  color: var(--white);
  padding: 56px 0 64px;
}

.page-about .about-version-grid {
  display: grid;
  gap: 24px;
}

.page-about .about-version-track {
  display: grid;
  gap: 18px;
}

.page-about .about-version-step {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  position: relative;
  transition: background .2s ease, transform .2s ease;
}

.page-about .about-version-step:hover {
  background: rgba(255, 255, 255, .12);
  transform: translateY(-2px);
}

.page-about .about-version-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--green);
  background: var(--yellow);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.page-about .about-version-step h3 {
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 8px;
}

.page-about .about-version-step p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .78);
  margin: 0;
}

.page-about .about-version-status {
  background: var(--purple);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  color: var(--white);
  display: flex;
  flex-direction: column;
}

.page-about .about-version-status-label {
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
  opacity: .85;
  margin: 0 0 10px;
}

.page-about .about-version-batch {
  font-family: var(--font-display);
  font-size: 54px;
  font-weight: 900;
  line-height: 1;
  margin: 0 0 14px;
}

.page-about .about-version-status-desc {
  font-size: 13px;
  line-height: 1.7;
  margin: 0;
  opacity: .9;
}

.page-about .about-paths {
  background: var(--bg);
  padding: 56px 0 64px;
}

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

.page-about .about-path-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--dark-blue);
  border-radius: var(--radius);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--about-shadow-sm);
}

.page-about .about-path-item:nth-child(1) {
  border-top-color: var(--orange);
}

.page-about .about-path-item:nth-child(2) {
  border-top-color: var(--yellow);
}

.page-about .about-path-item:nth-child(3) {
  border-top-color: var(--cyan);
}

.page-about .about-path-item:nth-child(4) {
  border-top-color: var(--purple);
}

.page-about .about-path-item:nth-child(5) {
  border-top-color: var(--green);
}

.page-about .about-path-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--surface-soft);
  padding: 8px;
  color: var(--dark-blue);
  display: block;
}

.page-about .about-path-item h3 {
  font-size: 18px;
  font-weight: 800;
  margin: 0;
}

.page-about .about-path-item p {
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0;
  flex: 1;
}

.page-about .about-path-tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 700;
  background: var(--dark-blue);
  color: var(--white);
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: .02em;
}

.page-about .about-devices {
  background: var(--dark-blue);
  color: var(--white);
  padding: 56px 0 64px;
}

.page-about .about-device-grid {
  display: grid;
  gap: 18px;
}

.page-about .about-device-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  color: var(--ink);
}

.page-about .about-device-media {
  padding: 16px;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--line);
}

.page-about .about-device-media img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  margin: 0 auto;
  border-radius: 8px;
  object-fit: cover;
  aspect-ratio: 5 / 3;
}

.page-about .about-device-body {
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.page-about .about-device-body h3 {
  font-size: 20px;
  font-weight: 800;
  margin: 0;
}

.page-about .about-device-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 12px;
  flex: 1;
}

.page-about .about-device-body .btn {
  margin-top: auto;
  align-self: flex-start;
}

.page-about .about-entries {
  background: var(--surface-soft);
  padding: 56px 0 64px;
}

.page-about .about-entry-grid {
  display: grid;
  gap: 14px;
}

.page-about .about-entry-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  border-top: 5px solid var(--orange);
  padding: 20px 18px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--about-shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.page-about .about-entry-card:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .about-entry-card:nth-child(3) {
  border-top-color: var(--new);
}

.page-about .about-entry-card:nth-child(4) {
  border-top-color: var(--purple);
}

.page-about .about-entry-card:hover,
.page-about .about-entry-card:focus {
  transform: translateY(-3px);
  box-shadow: var(--about-shadow);
}

.page-about .about-entry-code {
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-entry-name {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-entry-desc {
  font-size: 12px;
  color: var(--muted);
}

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

@media (min-width: 620px) {
  .page-about .about-path-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 760px) {
  .page-about .about-version-track {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-version-step::after {
    content: "";
    position: absolute;
    top: 30px;
    right: -21px;
    width: 20px;
    height: 2px;
    background: var(--yellow);
    opacity: .5;
  }

  .page-about .about-version-step:last-child::after {
    display: none;
  }

  .page-about .about-device-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (min-width: 700px) {
  .page-about .about-entry-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero-grid {
    grid-template-columns: 2.1fr 1fr;
    align-items: end;
    gap: 40px;
  }

  .page-about .about-version-grid {
    grid-template-columns: 2.2fr 1fr;
    gap: 30px;
  }
}

@media (min-width: 960px) {
  .page-about .about-stat-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-path-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-about .about-entry-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 519px) {
  .page-about .about-stat-grid {
    grid-template-columns: 1fr;
  }

  .page-about .about-stat-card {
    min-height: 148px;
  }

  .page-about .about-stats-bg {
    display: none;
  }

  .page-about .about-hero {
    padding-top: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-entry-card,
  .page-about .about-version-step {
    transition: none;
  }
}