.page-about {
  --about-green: #39FF14;
  --about-orange: #FF6B35;
  --about-bg-deep: #0D1B2A;
  --about-bg-card: #1B2A3A;
  --about-bg-raised: #22374B;
  --about-text: #E0E1DD;
  --about-heading: #F4EAE0;
  --about-border: rgba(224, 225, 221, 0.12);
  --about-steel: #4A6D8C;
  --about-moss: #6A8D73;
  color: var(--about-text);
  background: var(--about-bg-deep);
  font-family: "Noto Sans SC", "Source Sans Pro", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

.page-about .container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
  box-sizing: border-box;
}

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

.page-about a {
  color: inherit;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: "Roboto Mono", "Courier New", monospace;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(224, 225, 221, 0.66);
  padding-top: 28px;
  position: relative;
  z-index: 2;
}

.page-about .breadcrumb-item a {
  color: rgba(224, 225, 221, 0.66);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb-item a:hover {
  color: var(--about-green);
}

.page-about .breadcrumb-sep {
  color: var(--about-steel);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: 72px;
}

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

.page-about .about-skew-bg {
  position: absolute;
  top: 0;
  right: -10%;
  width: 58%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, rgba(57, 255, 20, 0.06) 40%, rgba(255, 107, 53, 0.08) 100%);
  clip-path: polygon(12% 0, 100% 0, 100% 100%, 0 100%);
  border-left: 1px solid var(--about-border);
  z-index: 1;
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: 40px;
}

.page-about .about-kicker {
  font-family: "Roboto Mono", "Courier New", monospace;
  font-size: 13px;
  color: var(--about-green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.page-about .about-title {
  font-family: "Oswald", Impact, "Arial Black", sans-serif;
  font-weight: 700;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.08;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--about-heading);
  margin: 0 0 18px;
}

.page-about .about-hero .about-lead {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(224, 225, 221, 0.86);
  max-width: 600px;
  margin: 0 0 20px;
}

.page-about .about-hero .about-meta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: "Roboto Mono", "Courier New", monospace;
  font-size: 14px;
  color: var(--about-green);
  padding: 10px 0 10px 14px;
  border-left: 3px solid var(--about-green);
  margin: 0 0 28px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  background: var(--about-green);
  color: #0D1B2A;
  font-family: "Oswald", Impact, "Arial Black", sans-serif;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  border: 2px solid var(--about-green);
  border-radius: 2px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.page-about .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(57, 255, 20, 0.18);
}

.page-about .btn:active {
  transform: scale(0.97);
}

.page-about .btn-cta {
  background: var(--about-orange);
  border-color: var(--about-orange);
  color: #0D1B2A;
}

.page-about .btn-cta:hover {
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.22);
}

.page-about .btn-outline {
  background: transparent;
  color: var(--about-heading);
  border-color: rgba(224, 225, 221, 0.4);
}

.page-about .btn-outline:hover {
  border-color: var(--about-green);
  color: var(--about-green);
  box-shadow: none;
}

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

.page-about .about-hero-frame {
  position: relative;
  border: 1px solid var(--about-border);
  border-radius: 2px;
  background:
    linear-gradient(rgba(57, 255, 20, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.04) 1px, transparent 1px),
    var(--about-bg-card);
  background-size: 28px 28px;
  padding: 10px;
}

.page-about .about-hero-frame::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 16px;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--about-green);
  border-left: 2px solid var(--about-green);
  z-index: 3;
}

.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  right: 16px;
  bottom: 16px;
  width: 14px;
  height: 14px;
  border-right: 2px solid var(--about-orange);
  border-bottom: 2px solid var(--about-orange);
  z-index: 3;
}

.page-about .about-hero-frame img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
  border-radius: 2px;
}

.page-about .about-hero-scanline {
  position: absolute;
  inset: 10px;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 6px,
    rgba(57, 255, 20, 0.025) 6px 7px
  );
  z-index: 2;
}

.page-about .about-hero-coord {
  position: absolute;
  right: 22px;
  bottom: 8px;
  font-family: "Roboto Mono", "Courier New", monospace;
  font-size: 11px;
  color: rgba(224, 225, 221, 0.48);
  letter-spacing: 0.08em;
  z-index: 2;
}

.page-about .about-section {
  padding: 76px 0 60px;
  position: relative;
}

.page-about .chapter {
  margin-bottom: 36px;
  position: relative;
}

.page-about .chapter-num {
  display: block;
  font-family: "Roboto Mono", "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--about-green);
  text-stroke: 1.2px var(--about-green);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.page-about .chapter-title {
  font-family: "Oswald", Impact, "Arial Black", sans-serif;
  font-weight: 700;
  font-size: clamp(28px, 4vw, 46px);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--about-heading);
  margin: 0 0 10px;
}

.page-about .chapter-sub {
  font-size: 16px;
  color: rgba(224, 225, 221, 0.66);
  margin: 0;
}

.page-about .about-divider {
  height: 1px;
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.35) 0%, var(--about-border) 40%, var(--about-border) 100%);
  margin: 0;
}

.page-about .about-paragraph {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(224, 225, 221, 0.86);
  margin: 0 0 18px;
}

.page-about .list-check {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .list-check li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--about-text);
}

.page-about .list-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--about-green);
  font-family: "Roboto Mono", "Courier New", monospace;
  font-weight: 700;
}

.page-about .about-mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-mission-text {
  padding: 0;
}

.page-about .about-mission-visual {
  position: relative;
  border: 1px solid var(--about-border);
  border-radius: 2px;
  overflow: hidden;
  background: var(--about-bg-card);
}

.page-about .about-mission-visual img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-timeline-intro {
  margin-bottom: 28px;
}

.page-about .about-timeline-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .filter-btn {
  background: transparent;
  border: 1px solid var(--about-border);
  color: rgba(224, 225, 221, 0.7);
  font-family: "Roboto Mono", "Courier New", monospace;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 2px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.page-about .filter-btn:hover {
  border-color: var(--about-green);
  color: var(--about-green);
}

.page-about .filter-btn.is-active,
.page-about .filter-btn[aria-pressed="true"] {
  background: rgba(57, 255, 20, 0.1);
  border-color: var(--about-green);
  color: var(--about-green);
}

.page-about .about-timeline {
  position: relative;
  padding-left: 24px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    var(--about-green) 8%,
    var(--about-steel) 50%,
    var(--about-green) 92%,
    transparent 100%
  );
  opacity: 0.5;
}

.page-about .about-milestone {
  position: relative;
  padding-bottom: 26px;
  transition: opacity 0.3s ease;
}

.page-about .about-milestone[data-category]:not([data-category*="stage-"]) {
  display: none;
}

.page-about .about-milestone-year {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: "Roboto Mono", "Courier New", monospace;
  font-weight: 700;
  font-size: 22px;
  color: var(--about-heading);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
  position: relative;
}

.page-about .about-milestone-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.14);
  flex-shrink: 0;
}

.page-about .about-milestone::before {
  content: attr(data-category);
  position: absolute;
  left: -24px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--about-bg);
  background: var(--about-green);
  z-index: 1;
  display: none;
}

.page-about .about-milestone-card {
  position: relative;
  background: var(--about-bg-card);
  border: 1px solid var(--about-border);
  border-left: 3px solid var(--about-green);
  border-radius: 2px;
  padding: 20px 22px;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.page-about .about-milestone-card:hover {
  border-color: var(--about-green);
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.3);
}

.page-about .about-milestone-title {
  font-family: "Oswald", Impact, "Arial Black", sans-serif;
  font-weight: 700;
  font-size: 20px;
  text-transform: uppercase;
  color: var(--about-heading);
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.page-about .about-milestone-desc {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(224, 225, 221, 0.78);
  margin: 0 0 12px;
}

.page-about .chip {
  display: inline-block;
  background: rgba(224, 122, 95, 0.14);
  color: #E07A5F;
  font-size: 12px;
  font-family: "Roboto Mono", "Courier New", monospace;
  border-radius: 2px;
  padding: 4px 10px;
  letter-spacing: 0.04em;
}

.page-about .about-numbers-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .about-stat-card {
  background: var(--about-bg-card);
  border: 1px solid var(--about-border);
  border-radius: 2px;
  border-top: 2px solid transparent;
  padding: 26px 24px 22px;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.page-about .about-stat-card:hover {
  border-top-color: var(--about-green);
  border-color: rgba(57, 255, 20, 0.45);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.page-about .data-label {
  font-family: "Roboto Mono", "Courier New", monospace;
  font-size: 13px;
  color: rgba(224, 225, 221, 0.58);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 12px;
}

.page-about .data-score {
  font-family: "Roboto Mono", "Courier New", monospace;
  font-weight: 700;
  font-size: clamp(52px, 7vw, 78px);
  line-height: 1;
  color: var(--about-green);
  margin: 0 0 12px;
}

.page-about .about-unit {
  font-size: 0.42em;
  color: var(--about-heading);
}

.page-about .about-stat-desc {
  font-size: 14px;
  color: rgba(224, 225, 221, 0.66);
  margin: 0;
  line-height: 1.6;
}

.page-about .about-numbers-footer {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
}

.page-about .about-infra-img {
  position: relative;
  border: 1px solid var(--about-border);
  border-radius: 2px;
  overflow: hidden;
  background: var(--about-bg-card);
}

.page-about .about-infra-img img {
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-infra-note {
  margin: 0;
  font-size: 14px;
  color: rgba(224, 225, 221, 0.62);
  padding: 22px;
  border: 1px solid var(--about-border);
  border-left: 3px solid var(--about-moss);
  border-radius: 2px;
  background: rgba(106, 141, 115, 0.06);
  line-height: 1.8;
}

.page-about .about-cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-cert-card {
  background: var(--about-bg-card);
  border: 1px solid var(--about-border);
  border-radius: 2px;
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
}

.page-about .about-cert-card::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--about-green), transparent);
  opacity: 0;
  transition: opacity 0.25s;
}

.page-about .about-cert-card:hover::after {
  opacity: 0.7;
}

.page-about .about-cert-card:hover {
  border-color: rgba(57, 255, 20, 0.4);
  transform: translateY(-3px);
}

.page-about .about-cert-icon {
  margin-bottom: 18px;
}

.page-about .about-cert-icon svg {
  display: block;
}

.page-about .about-cert-title {
  font-family: "Oswald", Impact, "Arial Black", sans-serif;
  font-weight: 700;
  font-size: 18px;
  text-transform: uppercase;
  color: var(--about-heading);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.page-about .about-cert-desc {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(224, 225, 221, 0.7);
  margin: 0;
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

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

.page-about .about-partner-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  background: rgba(27, 42, 58, 0.6);
  border: 1px solid var(--about-border);
  border-radius: 2px;
  padding: 20px 22px;
  transition: border-color 0.25s, background 0.25s;
  align-items: start;
}

.page-about .about-partner-item:hover {
  border-color: rgba(57, 255, 20, 0.45);
  background: var(--about-bg-card);
}

.page-about .about-partner-index {
  font-family: "Roboto Mono", "Courier New", monospace;
  font-weight: 700;
  font-size: 22px;
  color: transparent;
  -webkit-text-stroke: 1px var(--about-green);
  line-height: 1.1;
}

.page-about .about-partner-name {
  font-family: "Oswald", Impact, "Arial Black", sans-serif;
  font-weight: 700;
  font-size: 17px;
  text-transform: uppercase;
  color: var(--about-heading);
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.page-about .about-partner-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(224, 225, 221, 0.68);
  margin: 0;
}

.page-about .about-cta-section {
  padding: 28px 0 80px;
}

.page-about .about-cta-card {
  background:
    linear-gradient(120deg, rgba(57, 255, 20, 0.06) 0%, transparent 45%),
    var(--about-bg-card);
  border: 1px solid var(--about-border);
  border-radius: 2px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
  overflow: hidden;
}

.page-about .about-cta-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 4px;
  width: 100%;
  background: linear-gradient(90deg, var(--about-green) 0%, var(--about-orange) 100%);
}

.page-about .about-cta-num {
  font-size: 30px;
  margin-bottom: 6px;
}

.page-about .about-cta-title {
  font-family: "Oswald", Impact, "Arial Black", sans-serif;
  font-weight: 700;
  font-size: 24px;
  text-transform: uppercase;
  color: var(--about-heading);
  margin: 0 0 6px;
}

.page-about .about-cta-text {
  font-size: 15px;
  color: rgba(224, 225, 221, 0.66);
  margin: 0;
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (min-width: 640px) {
  .page-about .container {
    padding-left: 28px;
    padding-right: 28px;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-bottom: 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.02fr 1.18fr;
    gap: 48px;
    align-items: center;
    padding-top: 56px;
  }

  .page-about .about-title {
    font-size: 64px;
  }

  .page-about .about-mission-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
  }

  .page-about .about-section {
    padding: 92px 0 80px;
  }

  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 118px;
    top: 20px;
    bottom: 20px;
    background: linear-gradient(
      to bottom,
      transparent 0%,
      var(--about-green) 6%,
      var(--about-steel) 50%,
      var(--about-green) 94%,
      transparent 100%
    );
  }

  .page-about .about-milestone {
    display: grid;
    grid-template-columns: 120px 320px 1fr;
    gap: 28px;
    align-items: start;
    padding-bottom: 30px;
    position: relative;
  }

  .page-about .about-milestone-year {
    justify-content: flex-end;
    text-align: right;
    margin-bottom: 0;
  }

  .page-about .about-milestone-dot {
    position: absolute;
    left: 114px;
    top: 14px;
    width: 12px;
    height: 12px;
    border: 2px solid var(--about-bg);
    background: var(--about-green);
    box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.14);
    border-radius: 50%;
  }

  .page-about .about-milestone-card {
    grid-column: 3;
    max-width: 640px;
  }

  .page-about .about-numbers-footer {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
  }

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

  .page-about .about-cta-card {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 44px 48px;
  }

  .page-about .about-cta-links {
    flex-shrink: 0;
  }
}

@media (min-width: 1200px) {
  .page-about .about-numbers-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-about .about-milestone[data-filtered="true"][data-category*="stage-"] {
  display: none;
}

.page-about .about-timeline .about-milestone[data-category] {
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.page-about .filter-bar + [data-filter-grid] .about-milestone.is-hidden {
  display: none;
}

.page-about .about-hero-frame img,
.page-about .about-mission-visual img,
.page-about .about-infra-img img {
  filter: saturate(0.85) contrast(1.05);
}

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

.page-about {
  --about-bg: var(--about-bg-deep);
}