.page-about {
  --about-grid: rgba(255, 255, 255, 0.045);
  --about-panel: #0e0e1a;
  --about-magenta-soft: rgba(255, 46, 136, 0.12);
  --about-blue-soft: rgba(0, 212, 255, 0.12);
  --about-green-soft: rgba(186, 255, 60, 0.12);
  background-image:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: -1px -1px;
}

.page-about .about-crumb {
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-about .page-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent-green);
  margin: 0 0 14px;
}

.page-about .page-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 11vw, 6.8rem);
  line-height: 0.92;
  letter-spacing: -0.05em;
  margin: 0 0 22px;
  color: var(--text);
}

.page-about .about-lead {
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0;
}

.page-about .about-hero {
  position: relative;
  margin-top: 30px;
  padding: 30px 20px 20px;
  border: 1px solid var(--border-strong);
  background:
    linear-gradient(155deg, var(--about-magenta-soft), transparent 34%),
    linear-gradient(215deg, var(--about-blue-soft), transparent 42%),
    var(--about-panel);
}

.page-about .about-hero::before,
.page-about .about-hero::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
  pointer-events: none;
}

.page-about .about-hero::before {
  top: -2px;
  left: -2px;
  border-top: 3px solid var(--accent-magenta);
  border-left: 3px solid var(--accent-magenta);
}

.page-about .about-hero::after {
  bottom: -2px;
  right: -2px;
  border-bottom: 3px solid var(--accent-blue);
  border-right: 3px solid var(--accent-blue);
}

.page-about .about-hero-scale {
  position: absolute;
  top: 10px;
  left: 90px;
  right: 90px;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--border-strong) 0 1px, transparent 1px 9px);
  pointer-events: none;
}

.page-about .about-window-tag {
  position: absolute;
  top: -1px;
  right: 24px;
  z-index: 2;
  background: var(--accent-magenta);
  color: var(--bg-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
  padding: 7px 12px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 28px;
  position: relative;
}

.page-about .about-hero-copy {
  position: relative;
}

.page-about .about-hero-profile {
  border-left: 2px solid var(--accent-blue);
  padding: 4px 0 6px 18px;
}

.page-about .about-profile-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent-blue);
  margin: 0 0 14px;
}

.page-about .about-profile-list {
  margin: 0;
}

.page-about .about-profile-list > div {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 4px 14px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border);
}

.page-about .about-profile-list dt {
  color: var(--text-dim);
  font-size: 13px;
  flex-shrink: 0;
}

.page-about .about-profile-list dd {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  text-align: right;
  color: var(--text);
}

.page-about .about-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent-green);
}

.page-about .about-status .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: about-pulse 2s ease-out infinite;
}

@keyframes about-pulse {
  0% { box-shadow: 0 0 0 0 rgba(186, 255, 60, 0.45); }
  70% { box-shadow: 0 0 0 9px rgba(186, 255, 60, 0); }
  100% { box-shadow: 0 0 0 0 rgba(186, 255, 60, 0); }
}

.page-about .about-hero-figure {
  margin: 26px 0 0;
  border: 1px solid var(--border);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
}

.page-about .about-section-head {
  margin-bottom: 32px;
}

.page-about .about-section-head .section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-magenta);
  margin: 0 0 12px;
}

.page-about .about-section-head--blue .section-kicker {
  color: var(--accent-blue);
}

.page-about .about-section-head--green .section-kicker {
  color: var(--accent-green);
}

.page-about .about-section-head .section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0;
}

.page-about .about-section-head .section-desc {
  margin: 14px 0 0;
  max-width: 560px;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-identity,
.page-about .about-figures,
.page-about .about-system,
.page-about .about-service {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-about .about-identity-body {
  display: grid;
  gap: 26px;
}

.page-about .about-identity-copy p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-dim);
  margin: 0 0 16px;
}

.page-about .about-identity-copy p:last-child {
  margin-bottom: 0;
}

.page-about .about-identity-copy strong {
  color: var(--text);
  font-weight: 600;
}

.page-about .about-identity-note {
  position: relative;
  background: var(--about-magenta-soft);
  border: 1px solid rgba(255, 46, 136, 0.22);
  padding: 22px 18px 20px 54px;
  min-height: 120px;
}

.page-about .about-note-index {
  position: absolute;
  top: 18px;
  left: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-magenta);
  writing-mode: vertical-rl;
  letter-spacing: 0.22em;
}

.page-about .about-identity-note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-figures-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.page-about .about-stat {
  background: var(--bg);
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  min-height: 150px;
}

.page-about .about-stat .stat-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 7vw, 4rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text);
}

.page-about .about-stat:nth-child(1) .stat-num {
  color: var(--accent-magenta);
}

.page-about .about-stat:nth-child(2) .stat-num {
  color: var(--accent-blue);
}

.page-about .about-stat:nth-child(3) .stat-num {
  color: var(--accent-green);
}

.page-about .about-stat .stat-label {
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

.page-about .about-stat-plus,
.page-about .about-stat-unit {
  font-size: 0.5em;
  vertical-align: super;
  margin-left: 2px;
}

.page-about .about-figures-note {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--text-soft);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-about .about-sys-list {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-bottom: 30px;
}

.page-about .about-sys-row {
  position: relative;
  background: var(--bg);
  padding: 22px 18px;
  display: grid;
  gap: 10px;
}

.page-about .about-sys-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent-blue);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

.page-about .about-sys-row:hover::before,
.page-about .about-sys-row:focus-within::before {
  transform: scaleY(1);
}

.page-about .about-sys-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-soft);
  letter-spacing: 0.14em;
}

.page-about .about-sys-main {
  min-width: 0;
}

.page-about .about-sys-title {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.4vw, 1.7rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  color: var(--text);
}

.page-about .about-sys-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-sys-visual {
  align-items: center;
}

.page-about .about-sys-visual .media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-about .about-sys-side h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--text);
}

.page-about .about-sys-side p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-rhythm {
  position: relative;
  display: grid;
  gap: 26px;
  padding: clamp(2rem, 6vw, 4rem) clamp(1.2rem, 4vw, 3rem);
  background: var(--bg-deep);
  border: 1px solid var(--border);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-rhythm::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, var(--about-magenta-soft), transparent 32%),
    linear-gradient(230deg, var(--about-blue-soft), transparent 40%);
  pointer-events: none;
}

.page-about .about-rhythm-left {
  position: relative;
  z-index: 1;
}

.page-about .about-rhythm-left .section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-green);
  margin: 0 0 12px;
}

.page-about .about-rhythm-left .section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0;
}

.page-about .about-rhythm-text {
  max-width: 620px;
  margin: 18px 0 26px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-about .about-rhythm-visual {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px 28px;
  border-top: 1px solid var(--border);
  padding-top: 26px;
}

.page-about .about-rhythm-24 {
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: clamp(3.2rem, 9vw, 5.6rem);
  line-height: 1;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--accent-green);
  white-space: nowrap;
}

@supports not (-webkit-text-stroke: 1px black) {
  .page-about .about-rhythm-24 {
    color: var(--accent-green);
  }
}

.page-about .about-rhythm-waves {
  flex: 0 1 220px;
  display: block;
}

.page-about .about-rhythm-waves rect {
  opacity: 0.85;
}

.page-about .about-rhythm-online {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--accent-green);
}

.page-about .about-rhythm-online .status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
}

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

.page-about .about-service-copy {
  border-left: 3px solid var(--accent-blue);
  padding-left: 22px;
}

.page-about .about-service-copy p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
  margin: 0 0 14px;
}

.page-about .about-contact-email {
  color: var(--accent-blue);
  font-family: var(--font-mono);
  word-break: break-all;
}

.page-about .about-contact-list {
  list-style: none;
  margin: 18px 0 22px;
  padding: 0;
  border-top: 1px solid var(--border);
}

.page-about .about-contact-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--text);
}

.page-about .about-contact-list span {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .about-service-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-compliance {
  margin-top: 60px;
  border-top: 1px solid var(--border);
  background: var(--bg-deep);
}

.page-about .about-compliance-inner {
  display: grid;
  gap: 18px;
  padding-top: 40px;
  padding-bottom: 40px;
}

.page-about .about-compliance-inner .section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-green);
  margin: 0 0 8px;
}

.page-about .about-compliance h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0;
}

.page-about .about-compliance-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-icp {
  color: var(--accent-green);
  font-family: var(--font-mono);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-status .status-dot {
    animation: none;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 44px 40px 32px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: start;
    gap: 48px;
  }

  .page-about .page-title {
    font-size: clamp(3.6rem, 8vw, 6.8rem);
  }

  .page-about .about-hero-figure {
    margin-top: 36px;
  }

  .page-about .about-identity-body {
    grid-template-columns: 1fr 320px;
    gap: 48px;
  }

  .page-about .about-sys-row {
    grid-template-columns: 100px 1fr auto;
    align-items: start;
    gap: 24px;
    padding: 28px 30px;
  }

  .page-about .about-sys-text {
    max-width: 640px;
  }

  .page-about .about-service-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-about .about-figures-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-about .about-rhythm {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .page-about .about-rhythm-visual {
    border-top: 0;
    border-left: 1px solid var(--border);
    padding-top: 0;
    padding-left: 40px;
  }

  .page-about .about-compliance-inner {
    grid-template-columns: 260px 1fr;
    align-items: start;
  }
}