.page-about {
  --about-green: #39FF14;
  --about-blue: #00D4FF;
  --about-gold: #FFD700;
  --about-panel: #121820;
  --about-float: #1A2430;
  --about-line: #273241;
  --about-line-soft: rgba(39, 50, 65, 0.7);
  --about-data-bg: #0F1821;
  --about-text: #F0F4F8;
  --about-dim: #A8B3C0;
  --about-mute: #6B798A;
  --about-display: "Arial Narrow", "DIN Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  position: relative;
  overflow-x: clip;
  background-color: #0B0F14;
  color: var(--about-text);
}

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

.page-about .about-hero {
  position: relative;
  padding: 36px 0 64px;
  background: linear-gradient(120deg, rgba(57, 255, 20, 0.09) 0%, rgba(57, 255, 20, 0) 34%), linear-gradient(210deg, rgba(0, 212, 255, 0.09) 0%, rgba(0, 212, 255, 0) 42%), #0B0F14;
}

.page-about .about-hero__band {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--about-green) 0%, var(--about-blue) 55%, var(--about-gold) 100%);
}

.page-about .about-hero__pattern {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(39, 50, 65, 0.32) 1px, transparent 1px), linear-gradient(90deg, rgba(39, 50, 65, 0.32) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 88%);
  pointer-events: none;
}

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

.page-about .about-bread__sep {
  color: var(--about-mute);
  margin: 0 8px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 40px;
  margin-top: 44px;
}

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

.page-about .about-hero__subtitle {
  margin: 6px 0 0;
  font-family: var(--about-display);
  font-size: 20px;
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--about-dim);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 640px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-hero__card {
  position: relative;
  padding: 20px 20px 18px;
  border-radius: 4px;
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.1), rgba(18, 24, 32, 0.92) 48%);
  border: 1px solid rgba(57, 255, 20, 0.22);
  overflow: hidden;
}

.page-about .about-hero__card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 30px;
  height: 30px;
  background: var(--about-green);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  opacity: 0.55;
}

.page-about .about-hero__card--blue {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(18, 24, 32, 0.92) 48%);
  border-color: rgba(0, 212, 255, 0.24);
}

.page-about .about-hero__card--blue::after {
  background: var(--about-blue);
}

.page-about .about-hero__card--ghost {
  background: linear-gradient(135deg, rgba(18, 24, 32, 0.9), rgba(26, 36, 48, 0.85) 60%);
  border-color: var(--about-line);
}

.page-about .about-hero__card--ghost::after {
  background: var(--about-gold);
}

.page-about .about-hero__card-label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--about-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--about-dim);
}

.page-about .about-hero__card-value {
  display: block;
  font-family: var(--about-display);
  font-size: 52px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--about-text);
}

.page-about .about-hero__card-plus {
  color: var(--about-green);
  font-size: 40px;
  margin-left: 2px;
}

.page-about .about-hero__card--blue .about-hero__card-plus {
  color: var(--about-blue);
}

.page-about .about-hero__card--ghost .about-hero__card-plus {
  color: var(--about-gold);
  font-size: 30px;
}

.page-about .about-hero__card-unit {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--about-mute);
}

.page-about .about-chapter {
  padding: 64px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-chapter--data {
  background: linear-gradient(120deg, rgba(0, 212, 255, 0.05), transparent 40%), #0B0F14;
}

.page-about .about-chapter--network {
  background: linear-gradient(210deg, rgba(57, 255, 20, 0.04), transparent 42%), #0B0F14;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 32px;
}

.page-about .about-chapter__num {
  flex: 0 0 auto;
  margin-top: 2px;
  font-family: var(--about-mono);
  font-size: 52px;
  line-height: 1;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px var(--about-mute);
  opacity: 0.85;
}

.page-about .about-chapter__head-text {
  flex: 1;
  min-width: 0;
}

.page-about .about-milestone__visual {
  margin: 56px 0 0;
  padding: 16px;
  background: var(--about-data-bg);
  border: 1px solid var(--about-line);
  border-radius: 4px;
}

.page-about .about-milestone__visual figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-mute);
}

.page-about .about-timeline {
  position: relative;
  margin-top: 8px;
}

.page-about .about-timeline__rail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 15px;
  width: 2px;
  background-image: linear-gradient(180deg, var(--about-green) 0%, var(--about-blue) 62%, transparent 96%);
  background-size: 2px 16px;
  background-repeat: repeat-y;
  background-position: center top;
  opacity: 0.45;
}

.page-about .about-timeline__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  position: relative;
  display: flex;
  gap: 20px;
  padding-bottom: 52px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__node {
  position: relative;
  z-index: 2;
  flex: 0 0 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: default;
  outline: none;
}

.page-about .about-timeline__dot {
  width: 14px;
  height: 14px;
  margin-top: 28px;
  border-radius: 50%;
  border: 3px solid var(--about-green);
  background: #0B0F14;
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.12);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about .about-timeline__node:hover .about-timeline__dot,
.page-about .about-timeline__node:focus-visible .about-timeline__dot {
  transform: scale(1.2);
  border-color: var(--about-blue);
  box-shadow: 0 0 0 6px rgba(0, 212, 255, 0.18);
}

.page-about .about-timeline__year {
  margin-top: 7px;
  font-family: var(--about-mono);
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--about-dim);
  white-space: nowrap;
}

.page-about .about-timeline__pop {
  position: absolute;
  left: calc(100% + 10px);
  top: 20px;
  display: block;
  width: max-content;
  max-width: 180px;
  white-space: nowrap;
  font-family: var(--about-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--about-text);
  padding: 6px 10px;
  background: var(--about-float);
  border: 1px solid var(--about-line);
  border-left: 2px solid var(--about-green);
  border-radius: 2px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 8;
}

.page-about .about-timeline__node:hover .about-timeline__pop,
.page-about .about-timeline__node:focus-visible .about-timeline__pop {
  opacity: 1;
  transform: translateY(2px);
}

.page-about .about-timeline__card {
  position: relative;
  flex: 1;
  min-width: 0;
  margin-top: 4px;
  padding: 24px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-bottom: 3px solid rgba(57, 255, 20, 0.35);
  border-radius: 4px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.22);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline__item:hover .about-timeline__card {
  border-color: rgba(0, 212, 255, 0.42);
  box-shadow: 0 0 0 1px rgba(0, 212, 255, 0.14), 0 20px 40px rgba(0, 0, 0, 0.3);
}

.page-about .about-timeline__card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .about-timeline__index {
  flex: 0 0 auto;
  font-family: var(--about-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--about-mute);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--about-display);
  font-size: 22px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}

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

.page-about .about-data__layout {
  display: grid;
  gap: 32px;
  margin-top: 36px;
}

.page-about .about-data__main {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-about .about-data__item {
  padding: 6px 0 6px 20px;
  border-left: 3px solid var(--about-blue);
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.05), transparent 60%);
}

.page-about .about-data__label {
  font-family: var(--about-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--about-blue);
}

.page-about .about-data__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-data__figure {
  margin: 8px 0 0;
  padding: 16px;
  background: var(--about-data-bg);
  border: 1px solid var(--about-line);
  border-radius: 4px;
}

.page-about .about-data__figure img {
  width: 100%;
  border-radius: 2px;
}

.page-about .about-data__figure figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-mute);
}

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

.page-about .about-data__side-inner {
  display: grid;
  gap: 12px;
}

.page-about .about-data__stat {
  padding: 18px 16px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--about-blue);
  border-radius: 4px;
}

.page-about .about-data__stat-label {
  display: block;
  font-family: var(--about-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--about-dim);
}

.page-about .about-data__stat-value {
  display: block;
  margin-top: 8px;
  font-family: var(--about-display);
  font-size: 36px;
  line-height: 1;
  font-weight: 700;
  color: var(--about-text);
}

.page-about .about-data__stat-value span {
  color: var(--about-blue);
}

.page-about .about-data__stat-unit {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--about-mute);
}

.page-about .about-data__note {
  margin-top: 4px;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-dim);
  background: rgba(57, 255, 20, 0.05);
  border: 1px dashed rgba(57, 255, 20, 0.28);
  border-radius: 4px;
}

.page-about .about-cert__list {
  display: grid;
  gap: 14px;
  margin-top: 36px;
}

.page-about .about-cert__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 24px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-radius: 4px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-cert__item:hover {
  border-color: rgba(255, 215, 0, 0.5);
  box-shadow: 0 0 0 1px rgba(255, 215, 0, 0.16), 0 16px 36px rgba(0, 0, 0, 0.3);
}

.page-about .about-cert__mark {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 215, 0, 0.4);
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), transparent 70%);
  border-radius: 50%;
}

.page-about .about-cert__badge {
  font-family: var(--about-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--about-gold);
}

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

.page-about .about-cert__body h3 {
  margin: 0 0 8px;
  font-family: var(--about-display);
  font-size: 17px;
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: 0;
}

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

.page-about .about-network__grid {
  display: grid;
  gap: 32px;
  margin-top: 36px;
}

.page-about .about-network__main {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .about-network__block {
  padding: 24px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--about-green);
  border-radius: 4px;
}

.page-about .about-network__block h3 {
  margin: 0 0 8px;
  font-family: var(--about-display);
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
}

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

.page-about .about-network__figure {
  margin: 8px 0 0;
  padding: 16px;
  background: var(--about-data-bg);
  border: 1px solid var(--about-line);
  border-radius: 4px;
}

.page-about .about-network__figure img {
  width: 100%;
  border-radius: 2px;
}

.page-about .about-network__figure figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-mute);
}

.page-about .about-network__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-network__note {
  padding: 20px;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.07), rgba(18, 24, 32, 0.95) 42%);
  border: 1px solid rgba(255, 215, 0, 0.26);
  border-radius: 4px;
}

.page-about .about-network__note h3 {
  margin: 0 0 8px;
  font-family: var(--about-display);
  font-size: 16px;
  line-height: 1.4;
  font-weight: 700;
}

.page-about .about-network__note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-dim);
}

.page-about .about-network__link {
  display: grid;
  gap: 10px;
  padding: 18px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  border-radius: 4px;
}

.page-about .about-network__link span {
  font-size: 13px;
  line-height: 1.5;
  color: var(--about-mute);
  letter-spacing: 0.04em;
}

.page-about .about-outro {
  position: relative;
  padding: 72px 0 88px;
  margin-top: 40px;
  border-top: 1px solid var(--about-line);
  background: linear-gradient(115deg, rgba(57, 255, 20, 0.08) 0%, rgba(0, 212, 255, 0.04) 38%, transparent 60%), #0B0F14;
}

.page-about .about-outro__inner {
  position: relative;
}

.page-about .about-outro__inner::before {
  content: "";
  position: absolute;
  top: -72px;
  right: 24px;
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.1), transparent 70%);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about .about-outro__text {
  margin: 16px 0 0;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-dim);
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .btn {
  font-family: var(--about-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 3px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-about .btn-primary {
  background: var(--about-green);
  color: #0B0F14;
  border-color: var(--about-green);
}

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

.page-about .btn-ghost {
  background: transparent;
  color: var(--about-text);
  border-color: var(--about-line);
}

.page-about .btn-ghost:hover {
  border-color: var(--about-blue);
  color: var(--about-blue);
  background: rgba(0, 212, 255, 0.06);
}

@media (min-width: 640px) {
  .page-about .about-cert__list {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 18px;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 48px 0 80px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 300px);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-hero__subtitle {
    font-size: 26px;
  }

  .page-about .about-hero__lead {
    font-size: 16px;
  }

  .page-about .about-chapter {
    padding: 88px 0;
  }

  .page-about .about-chapter__head {
    margin-bottom: 44px;
  }

  .page-about .about-chapter__num {
    font-size: 68px;
  }

  .page-about .about-timeline__rail {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 48px minmax(0, 1fr);
    gap: 0 32px;
    align-items: start;
  }

  .page-about .about-timeline__node {
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
    width: 48px;
  }

  .page-about .about-timeline__card {
    grid-column: 1;
    grid-row: 1;
    justify-self: end;
    width: 100%;
    max-width: 520px;
    margin-right: 32px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    grid-column: 3;
    justify-self: start;
    margin-right: 0;
    margin-left: 32px;
  }

  .page-about .about-timeline__pop {
    max-width: 220px;
    font-size: 13px;
  }

  .page-about .about-data__layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 48px;
    margin-top: 44px;
  }

  .page-about .about-data__side-inner {
    position: sticky;
    top: 24px;
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 48px;
    align-items: start;
    margin-top: 44px;
  }

  .page-about .about-outro {
    padding: 88px 0 104px;
  }
}