.page-about {
  --page-about-navy: #0B1D3A;
  --page-about-gold: #E8A33D;
  --page-about-paper: #F5F2EB;
  --page-about-stone: #8A8A7A;
  --page-about-moss: #6A7B5E;
  --page-about-clay: #C67B4F;
  --page-about-white: #FFFFFF;
  --page-about-ink: #1A1A1A;
  --page-about-font-head: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --page-about-font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --page-about-font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --page-about-shadow-hard: 6px 6px 0 rgba(11, 29, 58, 0.92);
  background: var(--page-about-paper);
  font-family: var(--page-about-font-body);
  color: var(--page-about-ink);
}

.page-about .container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-about .container--narrow {
  max-width: 980px;
}

.page-about .section {
  padding: 72px 0;
}

.page-about .section--tinted {
  background: #EFE9DC;
}

.page-about .section--dark {
  background: var(--page-about-navy);
  color: var(--page-about-white);
}

.page-about .section-index {
  font-family: var(--page-about-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--page-about-gold);
  margin: 0 0 12px;
}

.page-about .section-title {
  font-family: var(--page-about-font-head);
  font-weight: 900;
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.page-about .section-copy {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--page-about-stone);
  margin: 0 0 24px;
}

.page-about .tag {
  display: inline-block;
  font-family: var(--page-about-font-mono);
  font-size: 0.75rem;
  padding: 4px 12px;
  border: 1px solid var(--page-about-stone);
  color: var(--page-about-ink);
  background: transparent;
  margin-right: 8px;
  margin-bottom: 8px;
}

.page-about .tag--ok {
  border-color: transparent;
  background: var(--page-about-moss);
  color: var(--page-about-white);
}

.page-about .tag--hot {
  border-color: transparent;
  background: var(--page-about-clay);
  color: var(--page-about-white);
}

.page-about .btn {
  display: inline-block;
  font-family: var(--page-about-font-head);
  font-weight: 700;
  padding: 14px 28px;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  font-size: 0.95rem;
}

.page-about .btn-primary {
  background: var(--page-about-gold);
  color: var(--page-about-navy);
  box-shadow: 4px 4px 0 rgba(232, 163, 61, 0.35);
}

.page-about .btn--light {
  background: var(--page-about-white);
  color: var(--page-about-navy);
  box-shadow: 4px 4px 0 rgba(255, 255, 255, 0.2);
}

.page-about .btn:hover,
.page-about .btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(11, 29, 58, 0.25);
}

.page-about .panel {
  background: var(--page-about-white);
  border: 2px solid var(--page-about-navy);
  box-shadow: var(--page-about-shadow-hard);
}

.page-about .panel-header {
  padding: 20px 24px;
  border-bottom: 2px solid var(--page-about-navy);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .panel-body {
  padding: 24px;
}

.page-about .prose p {
  font-size: 1rem;
  line-height: 1.9;
  margin: 0 0 20px;
}

/* hero */
.page-about__hero {
  background: linear-gradient(135deg, #0B1D3A 0%, #173052 55%, #244369 100%);
  color: var(--page-about-white);
  padding: 32px 0 72px;
  position: relative;
  overflow: hidden;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 100%;
  background:
    linear-gradient(115deg, transparent 45%, rgba(232, 163, 61, 0.55) 45.5%, transparent 47%),
    linear-gradient(115deg, transparent 25%, rgba(255, 255, 255, 0.06) 25.5%, transparent 27%);
  transform: skewX(-8deg);
  pointer-events: none;
}

.page-about__hero-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.page-about__hero-breadcrumb {
  font-family: var(--page-about-font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  padding-top: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.5);
}

.page-about__hero-breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
}

.page-about__hero-breadcrumb a:hover {
  color: var(--page-about-gold);
}

.page-about__hero-breadcrumb-separator {
  color: rgba(255, 255, 255, 0.3);
}

.page-about__hero-breadcrumb-separator--current {
  color: var(--page-about-gold);
}

.page-about__hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-top: 56px;
  align-items: center;
}

.page-about__hero-index {
  font-family: var(--page-about-font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--page-about-gold);
  margin: 0 0 20px;
}

.page-about__hero-title {
  font-family: var(--page-about-font-head);
  font-weight: 900;
  font-size: 2.4rem;
  line-height: 1.15;
  margin: 0 0 24px;
  letter-spacing: -0.02em;
}

.page-about__hero-title-rule {
  display: block;
  color: var(--page-about-gold);
  font-size: 1.4rem;
  margin-top: 10px;
}

.page-about__hero-lede {
  font-size: 1.05rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 28px;
  max-width: 680px;
}

.page-about__hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 8px;
}

.page-about__hero-tags .tag {
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--page-about-white);
  margin: 0;
}

.page-about__hero-tags .tag--ok {
  border-color: transparent;
}

.page-about__hero-tags .tag--hot {
  border-color: transparent;
}

.page-about__hero-visual {
  display: none;
}

.page-about__hero-image-frame {
  position: relative;
  border: 2px solid var(--page-about-gold);
  box-shadow: 10px 10px 0 rgba(232, 163, 61, 0.3);
  max-width: 420px;
  margin-left: auto;
}

.page-about__hero-image-frame::before {
  content: "EST. 2019";
  position: absolute;
  top: -18px;
  left: -14px;
  background: var(--page-about-gold);
  color: var(--page-about-navy);
  font-family: var(--page-about-font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 14px;
  z-index: 2;
}

.page-about__hero-image {
  display: block;
  width: 100%;
  height: auto;
}

/* story */
.page-about__story-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about__story-heading,
.page-about__story-content {
  position: relative;
}

.page-about__story-heading {
  border-left: 4px solid var(--page-about-gold);
  padding-left: 24px;
}

.page-about__story-heading .section-title {
  font-size: 1.8rem;
}

/* timeline */
.page-about__timeline-heading {
  max-width: 640px;
  margin-bottom: 48px;
}

.page-about__timeline-list {
  position: relative;
  padding: 0 0 0 28px;
}

.page-about__timeline-list::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 6px;
  width: 3px;
  background: linear-gradient(to bottom, var(--page-about-gold) 0%, var(--page-about-navy) 60%, var(--page-about-clay) 100%);
  opacity: 0.5;
}

.page-about__timeline-item {
  position: relative;
  padding-bottom: 48px;
}

.page-about__timeline-item:last-child {
  padding-bottom: 0;
}

.page-about__timeline-marker {
  position: absolute;
  left: -28px;
  top: 6px;
  width: 15px;
  height: 15px;
  background: var(--page-about-gold);
  border: 3px solid var(--page-about-navy);
  box-shadow: 0 0 0 3px rgba(232, 163, 61, 0.3);
  z-index: 2;
}

.page-about__timeline-card {
  background: var(--page-about-white);
  border: 2px solid var(--page-about-navy);
  box-shadow: var(--page-about-shadow-hard);
  padding: 24px 28px;
  transition: transform 0.25s ease;
}

.page-about__timeline-card:hover {
  transform: translateX(6px);
}

.page-about__timeline-year {
  font-family: var(--page-about-font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--page-about-gold);
  margin: 0 0 8px;
  background: var(--page-about-navy);
  display: inline-block;
  padding: 4px 12px;
  color: var(--page-about-white);
}

.page-about__timeline-title {
  font-family: var(--page-about-font-head);
  font-weight: 800;
  font-size: 1.25rem;
  margin: 0 0 10px;
}

.page-about__timeline-text {
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
  color: #3D3D3D;
}

/* scale */
.page-about__scale-heading {
  max-width: 680px;
  margin-bottom: 48px;
}

.page-about__scale-heading .section-copy {
  color: rgba(255, 255, 255, 0.65);
}

.page-about__scale-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about__scale-image-block {
  border: 2px solid var(--page-about-gold);
  box-shadow: 10px 10px 0 rgba(232, 163, 61, 0.15);
  overflow: hidden;
}

.page-about__scale-image {
  display: block;
  width: 100%;
  height: auto;
}

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

.page-about__scale-stat {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
  padding: 24px 20px;
  transition: background 0.25s ease;
}

.page-about__scale-stat:hover {
  background: rgba(232, 163, 61, 0.12);
}

.page-about__scale-stat-value {
  font-family: var(--page-about-font-head);
  font-weight: 900;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--page-about-gold);
  margin: 0 0 10px;
}

.page-about__scale-stat-suffix {
  font-size: 1rem;
  margin-left: 4px;
}

.page-about__scale-stat-label {
  font-family: var(--page-about-font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

/* capability */
.page-about__capability-heading {
  margin-bottom: 36px;
}

.page-about__capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about__capability-title {
  font-family: var(--page-about-font-head);
  font-weight: 800;
  font-size: 1.1rem;
  margin: 0;
}

.page-about__capability-text {
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0 0 16px;
}

.page-about__capability-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid #E0DCCF;
}

.page-about__capability-list li {
  padding: 12px 0;
  border-bottom: 1px solid #E0DCCF;
  font-size: 0.9rem;
  font-family: var(--page-about-font-mono);
  color: #4A4A3A;
}

.page-about__capability-list li::before {
  content: "▸ ";
  color: var(--page-about-gold);
}

/* accreditation */
.page-about__accreditation-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about__accreditation-list {
  margin-top: 32px;
}

.page-about__accreditation-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid #D8D2C4;
}

.page-about__accreditation-item:first-child {
  border-top: 1px solid #D8D2C4;
}

.page-about__accreditation-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--page-about-navy);
  color: var(--page-about-gold);
  background: var(--page-about-white);
  box-shadow: var(--page-about-shadow-hard);
}

.page-about__accreditation-name {
  font-family: var(--page-about-font-head);
  font-weight: 800;
  font-size: 1rem;
  margin: 0 0 6px;
}

.page-about__accreditation-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 0;
  color: #4A4A3A;
}

.page-about__accreditation-visual {
  position: relative;
  max-width: 520px;
}

.page-about__accreditation-image-frame {
  border: 2px solid var(--page-about-navy);
  box-shadow: var(--page-about-shadow-hard);
  background: var(--page-about-white);
}

.page-about__accreditation-image {
  display: block;
  width: 100%;
  height: auto;
}

.page-about__accreditation-image-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--page-about-navy);
  color: var(--page-about-white);
  font-family: var(--page-about-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding: 12px 18px;
}

.page-about__accreditation-image-index {
  color: var(--page-about-gold);
}

/* mission */
.page-about__mission {
  position: relative;
  overflow: hidden;
}

.page-about__mission::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -60px;
  width: 280px;
  height: 280px;
  border: 3px solid rgba(232, 163, 61, 0.3);
  transform: rotate(18deg);
  pointer-events: none;
}

.page-about__mission-inner {
  text-align: center;
  padding: 40px 0;
  position: relative;
  z-index: 2;
}

.page-about__mission-index {
  font-family: var(--page-about-font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--page-about-gold);
  margin: 0 0 16px;
}

.page-about__mission-title {
  font-family: var(--page-about-font-head);
  font-weight: 900;
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 20px;
}

.page-about__mission-text {
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto 32px;
}

.page-about__mission-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* contact */
.page-about__contact {
  padding-bottom: 96px;
}

.page-about__contact-panel {
  background: var(--page-about-white);
  border: 2px solid var(--page-about-navy);
  box-shadow: var(--page-about-shadow-hard);
  padding: 32px 28px;
}

.page-about__contact-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 28px;
}

.page-about__contact-list li {
  padding: 10px 0;
  border-bottom: 1px solid #E0DCCF;
  font-family: var(--page-about-font-mono);
  font-size: 0.9rem;
  color: #3D3D3D;
}

.page-about__contact-list li:first-child {
  border-top: 1px solid #E0DCCF;
}

/* reveal */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .page-about__timeline-card,
  .page-about__scale-stat,
  .page-about .btn {
    transition: none;
  }
}

@media (min-width: 768px) {
  .page-about .container {
    padding: 0 32px;
  }

  .page-about .section {
    padding: 96px 0;
  }

  .page-about__hero {
    padding: 40px 0 96px;
  }

  .page-about__hero-title {
    font-size: 3rem;
  }

  .page-about__hero-title-rule {
    font-size: 1.6rem;
  }

  .page-about__hero-visual {
    display: block;
  }

  .page-about__hero-layout {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
  }

  .page-about__story-layout {
    grid-template-columns: 5fr 7fr;
    gap: 64px;
  }

  .page-about__scale-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
  }

  .page-about__capability-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .page-about__accreditation-layout {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
  }

  .page-about__contact-panel {
    padding: 48px 56px;
  }
}

@media (min-width: 1024px) {
  .page-about .section-title {
    font-size: 2.4rem;
  }

  .page-about__hero-title {
    font-size: 3.4rem;
  }

  .page-about__hero-lede {
    font-size: 1.15rem;
  }

  .page-about__scale-layout {
    grid-template-columns: 6fr 6fr;
    gap: 56px;
    align-items: center;
  }

  .page-about__timeline-list {
    max-width: 820px;
  }

  .page-about__mission-title {
    font-size: 2.6rem;
  }
}