.page-about {
  --about-accent-glow: rgba(255, 107, 26, 0.12);
  --about-cyan-line: rgba(0, 229, 255, 0.24);
  --about-panel-radius: 18px;
  --about-timeline-dot: 14px;
  --about-content-max: 1080px;
}

.page-about {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.page-about__breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--text-sub);
}

.page-about__crumb {
  color: var(--text-sub);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about__crumb:hover {
  color: var(--cyan);
}

.page-about__crumb-sep {
  color: var(--line);
}

.page-about__crumb-current {
  color: var(--text-main);
}

.page-about__hero {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, #0A1128 0%, #16295A 100%);
  padding: 40px 24px 36px;
  display: grid;
  gap: 28px;
}

.page-about__hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(42, 59, 92, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 92, 0.28) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at 70% 40%, black 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 70% 40%, black 0%, transparent 78%);
}

.page-about__hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
}

.page-about__kicker {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0;
}

.page-about__hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.2;
  color: var(--text-main);
  margin: 0;
  max-width: 620px;
}

.page-about__lead {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-sub);
  margin: 0;
  max-width: 640px;
}

.page-about__hero-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about__hero-stat {
  padding: 14px 18px;
  background: rgba(18, 32, 68, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: grid;
  gap: 4px;
  min-width: 120px;
}

.page-about__hero-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 22px;
  color: var(--accent);
}

.page-about__hero-label {
  font-size: 12px;
  color: var(--text-sub);
}

.page-about__hero-glow {
  position: absolute;
  width: 240px;
  height: 240px;
  right: -80px;
  top: -80px;
  border-radius: 50%;
  background: rgba(255, 107, 26, 0.16);
  filter: blur(90px);
  z-index: 0;
  pointer-events: none;
}

.page-about__section {
  padding: 56px 0 0;
}

.page-about__section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 28px;
  border-left: 3px solid var(--accent);
  padding-left: 18px;
}

.page-about__section-no {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.page-about__section-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
  line-height: 1.15;
}

.page-about__section-desc {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0;
}

.page-about__section-link {
  font-size: 13px;
  font-family: var(--font-display);
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-cyan-line);
  padding-bottom: 2px;
  justify-self: start;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about__section-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.page-about__mission {
  padding: 56px 0 0;
}

.page-about__mission-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.page-about__mission-text {
  display: grid;
  gap: 14px;
}

.page-about__mission-text p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-sub);
  margin: 0;
}

.page-about__mission-text strong {
  color: var(--text-main);
  font-weight: 500;
}

.page-about__mission-visual {
  border-radius: var(--about-panel-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-panel);
}

.page-about__mission-img,
.page-about__timeline-img,
.page-about__tech-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__mission-card,
.page-about__tech-side {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--about-panel-radius);
  padding: 24px;
}

.page-about__card-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 18px;
}

.page-about__value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about__value-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
}

.page-about__value-index {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  padding-top: 3px;
}

.page-about__value-name {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.page-about__value-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-sub);
  margin: 0;
}

.page-about__evolution {
  padding: 56px 0 0;
}

.page-about__timeline-img-wrap {
  border-radius: var(--about-panel-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  margin-bottom: 32px;
  background: var(--bg-panel);
}

.page-about__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 32px;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--line) 40%, var(--line) 100%);
}

.page-about__milestone {
  position: relative;
  padding-left: 36px;
}

.page-about__milestone-marker {
  position: absolute;
  left: 0;
  top: 6px;
  width: var(--about-timeline-dot);
  height: var(--about-timeline-dot);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 107, 26, 0.15), 0 0 18px rgba(255, 107, 26, 0.32);
  z-index: 1;
}

.page-about__milestone-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--about-panel-radius);
  padding: 24px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about__milestone-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 26, 0.5);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35), var(--about-accent-glow);
}

.page-about__milestone-version {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
  display: inline-block;
  padding: 4px 10px;
  background: rgba(255, 107, 26, 0.1);
  border: 1px solid rgba(255, 107, 26, 0.28);
  border-radius: 4px;
  margin-bottom: 14px;
}

.page-about__milestone-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 10px;
}

.page-about__milestone-desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-sub);
  margin: 0;
}

.page-about__tech {
  padding: 56px 0 0;
}

.page-about__tech-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.page-about__tech-main {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--about-panel-radius);
  padding: 24px;
}

.page-about__tech-main p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-sub);
  margin: 0 0 18px;
}

.page-about__tech-main strong {
  color: var(--text-main);
}

.page-about__tech-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about__tech-item {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.5;
}

.page-about__tech-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about__tech-visual {
  border-radius: var(--about-panel-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-panel);
}

.page-about__tech-note {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin: 0 0 20px;
  padding: 10px 14px;
  background: rgba(0, 229, 255, 0.06);
  border-left: 3px solid var(--cyan);
  border-radius: 0 8px 8px 0;
}

.page-about__cycle {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about__cycle-node {
  display: grid;
  grid-template-columns: 46px 1fr;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg-deep);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.page-about__cycle-label {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.page-about__cycle-desc {
  font-size: 13px;
  color: var(--text-main);
}

.page-about__tech-footnote {
  font-size: 12px;
  color: var(--text-sub);
  line-height: 1.6;
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

.page-about__service {
  padding: 56px 0 0;
}

.page-about__service-card {
  background: linear-gradient(135deg, rgba(22, 41, 90, 0.75) 0%, rgba(18, 32, 68, 0.9) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: grid;
  gap: 22px;
}

.page-about__service-lead {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0;
}

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

.page-about__service-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(42, 59, 92, 0.7);
}

.page-about__service-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about__service-label {
  font-size: 13px;
  color: var(--text-sub);
  font-family: var(--font-display);
}

.page-about__service-value {
  font-size: 14px;
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.2s ease;
}

a.page-about__service-value:hover {
  color: var(--cyan);
}

.page-about__service-note {
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-sub);
  margin: 0;
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.18);
  border-radius: 10px;
  border: 1px solid rgba(42, 59, 92, 0.6);
}

.page-about__service-btn {
  display: inline-block;
  justify-self: start;
  background: linear-gradient(90deg, #FF6B1A 0%, #FFA500 100%);
  color: #0A1128;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  padding: 12px 26px;
  border-radius: 12px;
  transition: transform 0.2s var(--ease), box-shadow 0.2s ease;
}

.page-about__service-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 26, 0.28);
}

.page-about__entry-links {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about__entry-link {
  font-size: 13px;
  font-family: var(--font-display);
  color: var(--cyan);
  text-decoration: none;
  padding: 8px 14px 8px 0;
  border-bottom: 1px solid var(--about-cyan-line);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about__entry-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

@media (min-width: 720px) {
  .page-about {
    padding: 44px 32px 96px;
  }

  .page-about__hero {
    grid-template-columns: 1fr auto;
    padding: 52px 40px 44px;
    gap: 20px 40px;
  }

  .page-about__hero h1 {
    font-size: 40px;
  }

  .page-about__lead {
    font-size: 16px;
  }

  .page-about__hero-meta {
    grid-column: 1 / -1;
    justify-content: flex-end;
  }

  .page-about__section-head {
    grid-template-columns: 56px 1fr auto;
    align-items: end;
    gap: 16px;
  }

  .page-about__section-no {
    font-size: 14px;
  }

  .page-about__mission-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about__mission-text {
    grid-column: 1 / -1;
    max-width: 760px;
  }

  .page-about__mission-visual {
    grid-column: 1 / -1;
  }

  .page-about__mission-card {
    grid-column: 1 / -1;
  }

  .page-about__timeline {
    padding-left: 28px;
  }

  .page-about__timeline::before {
    left: 15px;
  }

  .page-about__milestone {
    padding-left: 52px;
  }

  .page-about__milestone-marker {
    left: -2px;
    width: 34px;
    height: 34px;
    background: transparent;
    box-shadow: none;
    border: 2px solid var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .page-about__milestone-marker::after {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 14px rgba(255, 107, 26, 0.6);
  }

  .page-about__tech-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about__tech-main {
    grid-column: 1 / 2;
  }

  .page-about__tech-visual {
    grid-column: 1 / 2;
  }

  .page-about__tech-side {
    grid-column: 2 / 3;
    grid-row: 1 / 3;
  }

  .page-about__service-card {
    padding: 36px 40px;
  }

  .page-about__service-list {
    grid-template-columns: 1fr 1fr;
    gap: 16px 28px;
  }

  .page-about__service-item {
    grid-template-columns: 96px 1fr;
  }
}

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

  .page-about__mission-text {
    grid-column: 1 / 2;
  }

  .page-about__mission-visual {
    grid-column: 1 / 2;
  }

  .page-about__mission-card {
    grid-column: 2 / 3;
    grid-row: 1 / 3;
  }

  .page-about__section-title {
    font-size: 28px;
  }
}