.page-about {
  background: var(--bg-page);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-about .pg-hero,
.page-about .pg-scale,
.page-about .pg-taxonomy,
.page-about .pg-update,
.page-about .pg-search,
.page-about .pg-version {
  position: relative;
  padding: 48px 0;
  overflow: hidden;
}

.page-about .pg-hero {
  background:
    radial-gradient(900px 320px at 85% 0%, rgba(0, 194, 255, 0.10), transparent 70%),
    var(--bg-page);
  border-bottom: 1px solid var(--line);
}

.page-about .pg-hero__inner {
  display: grid;
  gap: 36px;
}

.page-about .pg-hero__eyebrow {
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--lime);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-about .pg-hero h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.14;
  margin: 0 0 20px;
  padding-bottom: 22px;
  position: relative;
}

.page-about .pg-hero h1::after {
  content: "";
  display: block;
  width: 84px;
  height: 5px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--amber), var(--lime));
  position: absolute;
  bottom: 0;
  left: 0;
}

.page-about .pg-hero__desc {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.8;
  max-width: 640px;
  margin: 0 0 26px;
}

.page-about .pg-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .pg-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  align-self: center;
}

.page-about .pg-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  text-decoration: none;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .pg-stat:hover {
  transform: translateY(-3px);
  border-color: var(--lime);
}

.page-about .pg-stat__num {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 34px;
  line-height: 1.1;
  color: var(--ink);
}

.page-about .pg-stat__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}

.page-about .pg-stat--amber {
  border-top: 4px solid var(--amber);
}

.page-about .pg-stat--lime {
  border-top: 4px solid var(--lime);
}

.page-about .pg-stat--cyan {
  border-top: 4px solid var(--c-cyan);
}

.page-about .pg-stat--pink {
  border-top: 4px solid var(--pink);
}

.page-about .pg-stat--orange {
  border-top: 4px solid var(--orange);
}

.page-about .pg-stat--green {
  border-top: 4px solid var(--c-green);
}

.page-about .pg-scale {
  background:
    linear-gradient(rgba(57, 255, 136, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 136, 0.03) 1px, transparent 1px),
    var(--bg-teal);
  background-size: 40px 40px;
}

.page-about .pg-scale__grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about .pg-scale__card {
  background: rgba(15, 17, 21, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.page-about .pg-scale__card--total {
  background:
    linear-gradient(135deg, rgba(57, 255, 136, 0.10), transparent 60%),
    rgba(15, 17, 21, 0.65);
}

.page-about .pg-scale__num {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1;
  color: var(--lime);
  display: block;
}

.page-about .pg-scale__num--amber {
  color: var(--amber);
}

.page-about .pg-scale__num--cyan {
  color: var(--c-cyan);
}

.page-about .pg-scale__num--pink {
  color: var(--pink);
}

.page-about .pg-scale__num--lime {
  color: var(--lime);
}

.page-about .pg-scale__num--orange {
  color: var(--orange);
}

.page-about .pg-scale__card h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  margin: 12px 0 6px;
}

.page-about .pg-scale__card p,
.page-about .pg-scale__desc {
  color: var(--ink-dim);
  font-size: 13px;
  line-height: 1.7;
  margin: 0;
}

.page-about .pg-scale__desc {
  margin-top: 12px;
  font-size: 14px;
}

.page-about .pg-taxonomy {
  background:
    radial-gradient(800px 300px at 10% 20%, rgba(178, 134, 246, 0.10), transparent 70%),
    var(--bg-purple);
}

.page-about .pg-tree {
  display: grid;
  gap: 20px;
  margin-top: 32px;
}

.page-about .pg-tree__scene {
  background: rgba(15, 17, 21, 0.5);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.page-about .pg-tree__scene-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-about .pg-tree__scene-head h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  margin: 0;
}

.page-about .pg-tree__count {
  font-size: 12px;
  color: var(--lime);
  background: rgba(57, 255, 136, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.page-about .pg-tree__branches {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.page-about .pg-tree__branch {
  background: rgba(26, 30, 38, 0.7);
  border-left: 4px solid var(--c-cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 10px 14px;
  transition: border-color 0.2s ease;
}

.page-about .pg-tree__branch:nth-child(even) {
  border-left-color: var(--amber);
}

.page-about .pg-tree__branch:nth-child(odd) {
  border-left-color: var(--c-cyan);
}

.page-about .pg-tree__branch:hover {
  border-left-color: var(--lime);
}

.page-about .pg-tree__branch-name {
  display: block;
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
}

.page-about .pg-tree__tags {
  display: block;
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-dim);
  margin-top: 4px;
}

.page-about .pg-taxonomy__hint {
  color: var(--ink-dim);
  font-size: 13px;
  text-align: center;
  margin: 24px 0 0;
}

.page-about .pg-taxonomy__img {
  display: block;
  width: 100%;
  height: auto;
  margin: 28px auto 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
}

.page-about .pg-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

.page-about .pg-tags .tag {
  line-height: 1;
}

.page-about .pg-update {
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--bg-green);
  background-size: 40px 40px;
}

.page-about .pg-update__grid {
  display: grid;
  gap: 24px;
  margin-top: 32px;
}

.page-about .pg-timeline {
  display: grid;
  gap: 10px;
}

.page-about .pg-timeline__step {
  background: rgba(15, 17, 21, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 16px;
  display: grid;
  grid-template-columns: 20px 1fr;
  grid-template-rows: auto auto;
  column-gap: 12px;
  align-items: start;
}

.page-about .pg-timeline__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(245, 197, 24, 0.16);
  grid-row: 1 / 3;
  margin-top: 4px;
}

.page-about .pg-timeline__dot--cyan {
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(0, 194, 255, 0.16);
}

.page-about .pg-timeline__dot--lime {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(57, 255, 136, 0.16);
}

.page-about .pg-timeline__dot--pink {
  background: var(--pink);
  box-shadow: 0 0 0 4px rgba(255, 46, 111, 0.16);
}

.page-about .pg-timeline__label {
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}

.page-about .pg-timeline__desc {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.6;
}

.page-about .pg-update__img {
  display: block;
  width: 100%;
  height: auto;
  margin: 20px auto 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
}

.page-about .pg-update__aside {
  display: grid;
}

.page-about .pg-update__batch-card {
  background: rgba(15, 17, 21, 0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.page-about .pg-update__batch-label {
  color: var(--ink-dim);
  font-size: 13px;
  letter-spacing: 0.18em;
}

.page-about .pg-update__batch-num {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 72px;
  line-height: 1;
  color: var(--lime);
}

.page-about .pg-search__grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about .pg-search__step {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .pg-search__step:hover {
  transform: translateY(-2px);
  border-color: var(--lime);
}

.page-about .pg-search__num {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 32px;
  line-height: 1;
  color: var(--amber);
}

.page-about .pg-search__body h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  margin: 0 0 4px;
}

.page-about .pg-search__body p {
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 8px;
}

.page-about .pg-search__body a {
  color: var(--lime);
  text-decoration: none;
  font-size: 13px;
  border-bottom: 1px solid rgba(57, 255, 136, 0.3);
}

.page-about .pg-search__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

.page-about .pg-search__footer a {
  color: var(--ink-dim);
  font-size: 13px;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-about .pg-search__footer a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .pg-version {
  background:
    radial-gradient(600px 260px at 85% 10%, rgba(0, 194, 255, 0.08), transparent 70%),
    var(--bg-purple);
}

.page-about .pg-version__grid {
  display: grid;
  gap: 32px;
  margin-top: 32px;
}

.page-about .pg-version__img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
}

.page-about .pg-version__content {
  display: grid;
  gap: 20px;
  align-content: center;
}

.page-about .pg-version__paths {
  display: grid;
  gap: 16px;
}

.page-about .pg-version__path {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 20px;
  display: grid;
  gap: 12px;
}

.page-about .pg-version__path--old {
  border-left: 4px solid var(--bluegray);
}

.page-about .pg-version__path--new {
  border-left: 4px solid var(--lime);
}

.page-about .pg-version__path-label {
  color: var(--ink-dim);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.page-about .pg-version__path-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-about .pg-version__path-flow span {
  background: rgba(15, 17, 21, 0.5);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 13px;
  color: var(--ink);
}

.page-about .pg-version__path-flow i {
  color: var(--amber);
  font-style: normal;
}

.page-about .pg-version__path-count {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 28px;
  line-height: 1;
}

.page-about .pg-version__path-count--old {
  color: var(--bluegray);
}

.page-about .pg-version__path-count--new {
  color: var(--lime);
}

.page-about .pg-version__desc {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .pg-version__terminal {
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.8;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

@media (min-width: 640px) {
  .page-about .pg-scale__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .pg-scale__card--total {
    grid-column: span 2;
  }
}

@media (min-width: 768px) {
  .page-about .pg-hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .page-about .pg-hero__stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .pg-tree {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .page-about .pg-update__grid {
    grid-template-columns: 1fr 280px;
  }

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

  .page-about .pg-version__grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .pg-scale__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .pg-scale__card--total {
    grid-column: span 1;
  }

  .page-about .pg-search__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}