.page-about {
  --about-grid: rgba(163, 177, 252, 0.07);
  --about-grid-strong: rgba(163, 177, 252, 0.14);
  --about-green-glow: rgba(15, 255, 80, 0.14);
  --about-orange-glow: rgba(255, 107, 53, 0.16);
  --about-pink-glow: rgba(255, 62, 107, 0.15);
  background:
    radial-gradient(circle at 8% 0%, var(--about-green-glow), transparent 26%),
    radial-gradient(circle at 95% 28%, var(--about-orange-glow), transparent 30%),
    var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
}

.page-about .page-about__shell {
  min-width: 0;
  padding-block: clamp(1.5rem, 4vw, 3.5rem) 4rem;
}

.page-about .page-about__body {
  min-width: 0;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
}

.page-about .breadcrumb {
  margin-bottom: 1.5rem;
}

.page-about .page-about__rail {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-alt);
}

.page-about .page-about__rail-label {
  flex: none;
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.page-about .page-about__rail-list {
  display: flex;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .page-about__rail-link {
  display: inline-block;
  padding: 0.35rem 0.65rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text-dim);
  font-family: var(--font-head);
  font-size: 0.78rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .page-about__rail-link:hover,
.page-about .page-about__rail-link:focus {
  color: var(--text-main);
  border-color: var(--green);
}

.page-about .page-about__manifesto {
  position: relative;
  margin-bottom: 2rem;
  padding: clamp(2rem, 7vw, 6rem) 0 1.5rem;
  text-align: center;
}

.page-about .page-about__manifesto::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(circle at 50% 20%, black, transparent 72%);
  mask-image: radial-gradient(circle at 50% 20%, black, transparent 72%);
}

.page-about .page-about__manifesto > * {
  position: relative;
  z-index: 1;
}

.page-about .page-about__axis-note {
  display: block;
  margin-bottom: 1rem;
  font-family: var(--font-head);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.page-about .page-about__manifesto .section-label {
  color: var(--green);
}

.page-about .page-about__manifesto h1 {
  width: min(100%, 980px);
  margin: 0.75rem auto 1rem;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.page-about .page-about__manifesto h1 .gradient-text {
  display: block;
  margin-top: 0.2rem;
  font-size: clamp(1.2rem, 4vw, 2.8rem);
  letter-spacing: 0;
  text-transform: none;
}

.page-about .page-about__manifesto .page-intro {
  width: min(100%, 760px);
  margin: 0 auto;
  color: var(--text-dim);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.65;
}

.page-about .page-about__manifesto-link {
  margin-top: 1.5rem;
}

.page-about .page-about__brand-visual {
  margin: 0 0 2rem;
}

.page-about .page-about__brand-visual-img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-deep);
}

.page-about .page-about__brand-visual figcaption {
  margin-top: 0.6rem;
  color: var(--text-dim);
  font-family: var(--font-head);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .page-about__section {
  position: relative;
  overflow: hidden;
  margin-top: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(2.5rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .page-about__section:target {
  background: radial-gradient(circle at 82% 10%, var(--about-green-glow), transparent 42%);
}

.page-about .page-about__section-head {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .page-about__section-head .section-label {
  display: inline-block;
  margin-bottom: 0.5rem;
  color: var(--green);
}

.page-about .page-about__section-head h2 {
  margin: 0.2rem 0 0.5rem;
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.page-about .page-about__section-desc {
  max-width: 680px;
  margin: 0;
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.7;
}

.page-about .tile-label {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--green);
  font-family: var(--font-head);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.page-about .page-about__stat-num {
  display: block;
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--green) 0%, var(--pink) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

@supports not (background-clip: text) {
  .page-about .page-about__stat-num {
    background: none;
    color: var(--green);
  }
}

.page-about .page-about__mission-grid {
  display: grid;
  gap: var(--gutter);
  margin-top: 2rem;
}

.page-about .page-about__mission-card {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-panel);
}

.page-about .page-about__mission-card h3 {
  margin: 0.5rem 0 0.75rem;
  font-size: 1.35rem;
}

.page-about .page-about__mission-card p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.7;
}

.page-about .page-about__mission-card--main p {
  font-size: 1rem;
}

.page-about .page-about__mission-quote {
  margin: 1.5rem 0 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--orange);
  border-radius: 0 10px 10px 0;
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.08), transparent 70%);
  color: var(--text-main);
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .page-about__mission-action {
  margin-top: 1rem;
}

.page-about .page-about__mission-action a {
  color: var(--green);
  text-decoration: none;
}

.page-about .page-about__mission-action a:hover,
.page-about .page-about__mission-action a:focus {
  text-decoration: underline;
}

.page-about .page-about__search-index {
  position: relative;
  z-index: 1;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px dashed var(--line);
}

.page-about .page-about__search-index-copy {
  margin: 0.5rem 0 1.25rem;
  color: var(--text-dim);
}

.page-about .page-about__search-grid {
  display: grid;
  gap: 1rem;
}

.page-about .page-about__search-card {
  display: block;
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
  text-decoration: none;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-about .page-about__search-card:hover,
.page-about .page-about__search-card:focus {
  border-color: var(--green);
  background: rgba(15, 255, 80, 0.06);
  transform: translateY(-2px);
}

.page-about .page-about__search-num {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--green);
  font-family: var(--font-head);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.page-about .page-about__search-keyword {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
  word-break: break-word;
}

.page-about .page-about__search-answer {
  display: block;
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.6;
}

.page-about .page-about__timeline-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.page-about .page-about__timeline-jump a {
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-dim);
  font-family: var(--font-head);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .page-about__timeline-jump a:hover,
.page-about .page-about__timeline-jump a:focus {
  border-color: var(--green);
  color: var(--green);
}

.page-about .page-about__timeline-wrap {
  position: relative;
  margin-top: 0.5rem;
}

.page-about .page-about__timeline-svg {
  position: absolute;
  left: 15px;
  top: 22px;
  width: 2px;
  height: calc(100% - 44px);
  color: var(--line);
  overflow: visible;
}

.page-about .page-about__timeline-svg line {
  stroke: currentColor;
  stroke-width: 1.5;
}

.page-about .page-about__timeline {
  display: grid;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .page-about__timeline-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 1rem;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .page-about__timeline-marker {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--green);
  border-radius: 50%;
  background: var(--bg-main);
  color: var(--green);
  font-family: var(--font-head);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-about .page-about__timeline-marker::after {
  content: "";
  position: absolute;
  inset: -6px;
  border: 1px solid rgba(15, 255, 80, 0.18);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .page-about__timeline-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .page-about__timeline-card h3 {
  margin: 0.5rem 0 0.5rem;
  font-size: 1.2rem;
}

.page-about .page-about__timeline-card p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.7;
}

.page-about .page-about__timeline-card img {
  display: block;
  width: 100%;
  margin-top: 1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.page-about .page-about__timeline-item:target .page-about__timeline-card {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(15, 255, 80, 0.12), var(--shadow-deep);
}

.page-about .page-about__timeline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .page-about__bento {
  display: grid;
  gap: var(--gutter);
  grid-template-columns: minmax(0, 1fr);
  margin-top: 2rem;
}

.page-about .page-about__tile {
  min-width: 0;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-panel);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about .page-about__tile:hover,
.page-about .page-about__tile:focus-within {
  border-color: var(--green);
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(15, 255, 80, 0.08), var(--shadow-deep);
}

.page-about .page-about__tile--photo {
  display: flex;
  min-height: 240px;
  padding: 0;
  overflow: hidden;
}

.page-about .page-about__tile-photo {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.page-about .page-about__tile--photo:hover .page-about__tile-photo {
  transform: scale(1.03);
}

.page-about .page-about__tile .tile-heading {
  margin: 0.35rem 0;
  font-size: 1.2rem;
}

.page-about .page-about__tile .tile-meta {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--orange);
  font-family: var(--font-head);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-about .page-about__tile p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.6;
}

.page-about .page-about__tile .page-about__stat-num {
  margin-bottom: 0.75rem;
}

.page-about .page-about__section--honors {
  background:
    radial-gradient(circle at 12% 10%, var(--about-orange-glow), transparent 34%),
    radial-gradient(circle at 90% 90%, var(--about-green-glow), transparent 30%);
}

.page-about .page-about__honor-grid {
  display: grid;
  gap: var(--gutter);
  margin-top: 2rem;
}

.page-about .page-about__honor-card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(135deg, var(--bg-alt), rgba(22, 33, 62, 0.55));
}

.page-about .page-about__honor-card::after {
  content: "";
  position: absolute;
  top: -36px;
  right: -36px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: var(--about-green-glow);
  pointer-events: none;
}

.page-about .page-about__honor-code {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--orange);
  font-family: var(--font-head);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
}

.page-about .page-about__honor-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  line-height: 1.3;
}

.page-about .page-about__honor-card p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.6;
}

.page-about .page-about__promise {
  margin-top: 2rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    radial-gradient(circle at 85% 15%, var(--about-orange-glow), transparent 32%),
    radial-gradient(circle at 10% 95%, var(--about-green-glow), transparent 32%),
    var(--bg-alt);
}

.page-about .page-about__promise-lead {
  max-width: 760px;
  margin: 0 0 2rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
}

.page-about .page-about__promise-grid {
  display: grid;
  gap: 1rem;
}

.page-about .page-about__promise-item {
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
  border-left: 2px solid var(--orange);
  border-radius: 0 12px 12px 0;
  background: rgba(255, 255, 255, 0.03);
}

.page-about .page-about__promise-num {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--green);
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  line-height: 1;
}

.page-about .page-about__promise-item h3 {
  margin: 0.5rem 0 0.4rem;
  font-size: 1.1rem;
}

.page-about .page-about__promise-item p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.6;
}

.page-about .page-about__promise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .page-about__promise-note {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 0.9rem;
}

.page-about .page-about__related {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.page-about .page-about__related-link {
  color: var(--text-dim);
  font-family: var(--font-head);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.page-about .page-about__related-link:hover,
.page-about .page-about__related-link:focus {
  color: var(--green);
}

@media (min-width: 720px) {
  .page-about .page-about__mission-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .page-about .page-about__search-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .page-about__bento {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .page-about__tile--photo {
    grid-column: span 5;
  }

  .page-about .page-about__tile--team {
    grid-column: span 7;
  }

  .page-about .page-about__tile--users,
  .page-about .page-about__tile--games,
  .page-about .page-about__tile--daily {
    grid-column: span 4;
  }

  .page-about .page-about__honor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .page-about__promise-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .page-about__shell {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 4.5rem);
  }

  .page-about .page-about__rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
  }

  .page-about .page-about__rail-label {
    display: block;
    padding-left: 0.75rem;
    margin-bottom: 0.25rem;
  }

  .page-about .page-about__rail-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .page-about__rail-list li + li {
    margin-top: 0.25rem;
  }

  .page-about .page-about__rail-link {
    display: block;
    padding: 0.65rem 0.75rem;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    white-space: normal;
  }

  .page-about .page-about__rail-link:hover,
  .page-about .page-about__rail-link:focus {
    border-left-color: var(--green);
    background: linear-gradient(90deg, rgba(15, 255, 80, 0.06), transparent);
    color: var(--text-main);
  }

  .page-about .page-about__axis-note {
    position: absolute;
    left: -1.2rem;
    top: 4rem;
    margin: 0;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition: none !important;
  }
}