.page-about {
  --about-grid: rgba(180, 94, 234, 0.09);
  --about-grid-green: rgba(0, 255, 148, 0.16);
  --about-grid-terra: rgba(198, 123, 78, 0.28);
  position: relative;
  background:
    linear-gradient(var(--about-grid) 1px, transparent 1px) 0 0 / 100% 56px,
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px) 0 0 / 56px 100%,
    var(--bg);
  color: var(--ink);
}

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

.page-about .kicker {
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.page-about .section-title {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 14px;
  color: var(--ink);
}

.page-about h2.section-title {
  position: relative;
  padding-bottom: 12px;
}

.page-about h2.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 72px;
  height: 3px;
  background: linear-gradient(90deg, var(--purple), var(--green));
  border-radius: 2px;
}

.page-about .about-hero {
  padding: 24px 16px 32px;
}

.page-about .about-hero-frame {
  position: relative;
  min-height: 480px;
  overflow: hidden;
  border: 1px solid rgba(180, 94, 234, 0.32);
  display: flex;
  align-items: flex-end;
}

.page-about .about-hero-image {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-hero-shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(10, 10, 15, 0.55) 0%, rgba(10, 10, 15, 0.82) 70%, rgba(10, 10, 15, 0.96) 100%);
}

.page-about .about-hero-content {
  position: relative;
  z-index: 2;
  padding: 32px 0;
}

.page-about .about-hero .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.page-about .about-hero .breadcrumbs a {
  color: var(--purple);
  text-decoration: none;
}

.page-about .about-hero .breadcrumbs [aria-current="page"] {
  color: var(--ink-dim);
}

.page-about .about-hero h1 {
  font-size: clamp(1.5rem, 4vw, 2.6rem);
  line-height: 1.2;
  margin: 0 0 14px;
  max-width: 960px;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-hero-lead {
  max-width: 860px;
  color: rgba(244, 234, 224, 0.85);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 22px;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero-meta span {
  border: 1px solid rgba(0, 255, 148, 0.3);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  padding: 6px 12px;
  border-radius: 2px;
}

.page-about .about-story {
  padding: 48px 16px;
  border-top: 1px solid var(--about-grid-terra);
}

.page-about .about-story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-story-left > p:not(.kicker) {
  color: var(--ink-dim);
  line-height: 1.75;
  font-size: 0.92rem;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 28px;
  padding-left: 22px;
  border-left: 1px solid rgba(0, 255, 148, 0.25);
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.page-about .about-timeline-item:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
}

.page-about .about-timeline-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.page-about .about-timeline-ver {
  font-family: var(--font-mono);
  color: var(--purple);
  border: 1px solid rgba(180, 94, 234, 0.4);
  padding: 3px 8px;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-about .about-timeline h3 {
  margin: 0;
  font-size: 1.08rem;
  color: var(--ink);
}

.page-about .about-timeline-item > p {
  color: var(--ink-dim);
  font-size: 0.88rem;
  line-height: 1.7;
  margin: 0;
}

.page-about .about-timeline ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--ink-dim);
  font-size: 0.84rem;
  line-height: 1.7;
}

.page-about .about-param-panel {
  padding: 24px;
  border: 1px solid rgba(180, 94, 234, 0.25);
  background: rgba(20, 20, 32, 0.82);
}

.page-about .about-param-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--green);
  margin: 0 0 6px;
  border-bottom: 1px solid rgba(0, 255, 148, 0.2);
  padding-bottom: 12px;
}

.page-about .about-param-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(198, 123, 78, 0.18);
  font-size: 0.88rem;
}

.page-about .about-param-row:last-of-type {
  border-bottom: none;
}

.page-about .about-param-row span {
  color: var(--ink-dim);
}

.page-about .about-param-row strong {
  font-family: var(--font-mono);
  color: var(--ink);
  font-weight: 600;
  text-align: right;
}

.page-about .about-param-note {
  margin-top: 14px;
  font-size: 0.75rem;
  color: var(--ink-dim);
  text-align: center;
}

.page-about .about-index {
  padding: 48px 16px;
  border-top: 1px solid var(--about-grid-terra);
}

.page-about .about-index-lead {
  max-width: 820px;
  color: var(--ink-dim);
  line-height: 1.8;
  font-size: 0.92rem;
}

.page-about .about-index-visual {
  margin: 26px 0;
  border: 1px solid rgba(180, 94, 234, 0.2);
  background: rgba(20, 20, 32, 0.5);
  overflow: hidden;
}

.page-about .about-index-visual svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.page-about .about-idx {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid rgba(180, 94, 234, 0.18);
  background: rgba(20, 20, 32, 0.55);
  color: var(--ink);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

.page-about .about-idx i {
  font-style: normal;
  color: var(--green);
  font-size: 0.68rem;
}

.page-about .about-idx--active {
  border-color: rgba(0, 255, 148, 0.45);
  background: rgba(0, 255, 148, 0.08);
  color: var(--green);
}

.page-about .about-resource {
  padding: 48px 16px;
  border-top: 1px solid var(--about-grid-terra);
  background: rgba(180, 94, 234, 0.04);
}

.page-about .about-resource-intro {
  max-width: 820px;
  color: var(--ink-dim);
  line-height: 1.8;
  font-size: 0.92rem;
}

.page-about .about-resource-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 28px;
}

.page-about .about-resource-chart {
  border: 1px solid rgba(0, 255, 148, 0.18);
  padding: 10px;
  background: rgba(20, 20, 32, 0.5);
}

.page-about .about-resource-chart img,
.page-about .about-tech-visual img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
}

.page-about .about-resource-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .about-stat {
  border: 1px solid rgba(0, 255, 148, 0.22);
  background: rgba(20, 20, 32, 0.55);
  padding: 18px 14px;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 6px;
  line-height: 1.1;
}

.page-about .about-stat-label {
  color: var(--ink-dim);
  font-size: 0.75rem;
}

.page-about .about-resource-note {
  margin-top: 28px;
  border-left: 3px solid var(--terracotta);
  padding: 14px 18px;
  background: rgba(20, 20, 32, 0.45);
  color: var(--ink-dim);
  font-size: 0.9rem;
  line-height: 1.8;
}

.page-about .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.page-about .about-tech {
  padding: 48px 16px;
  border-top: 1px solid var(--about-grid-terra);
}

.page-about .about-tech-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 22px;
}

.page-about .about-tech-intro {
  color: var(--ink-dim);
  line-height: 1.8;
  font-size: 0.92rem;
  border-left: 3px solid var(--purple);
  padding: 10px 16px;
  background: rgba(180, 94, 234, 0.06);
}

.page-about .about-tech-item {
  position: relative;
  padding: 18px 0 14px 22px;
  border-bottom: 1px solid rgba(180, 94, 234, 0.15);
}

.page-about .about-tech-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 23px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--purple);
  box-shadow: 0 0 8px rgba(180, 94, 234, 0.6);
}

.page-about .about-tech-item h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-about .about-tech-item p {
  color: var(--ink-dim);
  font-size: 0.88rem;
  line-height: 1.7;
  margin: 0;
}

.page-about .about-tech-visual {
  align-self: start;
  border: 1px solid rgba(0, 255, 148, 0.18);
  padding: 10px;
  background: rgba(20, 20, 32, 0.5);
}

.page-about .about-tech-pulse {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
}

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

@keyframes page-about-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(0, 255, 148, 0.5);
  }
  50% {
    opacity: 0.6;
    box-shadow: 0 0 8px 2px rgba(0, 255, 148, 0.25);
  }
}

.page-about .about-operator {
  padding: 48px 16px;
  border-top: 1px solid var(--about-grid-terra);
}

.page-about .about-operator-panel {
  padding: 28px 24px;
  border: 1px solid rgba(198, 123, 78, 0.3);
  background: rgba(20, 20, 32, 0.7);
  max-width: 820px;
}

.page-about .about-operator-panel > p {
  color: var(--ink-dim);
  line-height: 1.7;
  font-size: 0.9rem;
  max-width: 720px;
}

.page-about .about-operator-list {
  margin: 20px 0;
}

.page-about .about-operator-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(198, 123, 78, 0.16);
}

.page-about .about-operator-row span {
  color: var(--ink-dim);
  font-size: 0.84rem;
}

.page-about .about-operator-row strong {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink);
  word-break: break-all;
}

.page-about .about-operator-note {
  font-size: 0.82rem;
  color: var(--ink-dim);
  border-left: 3px solid var(--terracotta);
  padding: 12px 14px;
  background: rgba(198, 123, 78, 0.08);
  margin: 16px 0 22px;
  line-height: 1.7;
}

.page-about .about-operator-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 4px;
}

@media (min-width: 640px) {
  .page-about .about-operator-row {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
  }

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

@media (min-width: 720px) {
  .page-about .about-index-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-story-grid {
    grid-template-columns: 1fr 320px;
    align-items: start;
  }

  .page-about .about-resource-wrap {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-tech-layout {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-index-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .page-about .about-hero-frame {
    min-height: 520px;
  }

  .page-about .about-param-panel {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}