.page-about {
  --deep-blue-2: #10224A;
  --grid-line: rgba(255, 255, 255, 0.06);
  --grid-line-dark: rgba(11, 27, 58, 0.08);
  display: block;
  background: var(--light-gray);
  color: var(--dark-gray);
}

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

.page-about .about-hero {
  position: relative;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    var(--deep-blue);
  background-size: 36px 36px;
  color: var(--white);
  padding: var(--space-5) 0;
  isolation: isolate;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  height: 6px;
  width: 72%;
  background: linear-gradient(90deg, var(--china-red), var(--gold));
}

.page-about .about-hero .vert-label {
  display: none;
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: center;
}

.page-about .hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.page-about .breadcrumb {
  margin-bottom: var(--space-1);
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .breadcrumb-item {
  font-size: 0.85rem;
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: var(--space-2);
  color: rgba(255, 255, 255, 0.5);
}

.page-about .breadcrumb-item a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .breadcrumb-item a:hover,
.page-about .breadcrumb-item a:focus-visible {
  color: var(--gold);
}

.page-about .breadcrumb-item[aria-current="page"] {
  color: var(--gold);
}

.page-about .page-title {
  margin: 0;
  font-size: clamp(2rem, 4.8vw, 3.4rem);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .page-subtitle {
  margin: 0;
  max-width: 52ch;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-1);
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin-top: var(--space-3);
}

.page-about .hero-stat {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .hero-stat .data-number {
  font-size: 1.8rem;
}

.page-about .hero-stat span:last-child {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .hero-img-frame {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  margin: 0;
}

.page-about .hero-img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.page-about .page-section {
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
}

.page-about .section-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-about .section-num {
  color: var(--china-red);
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 1.1rem;
}

.page-about .section-title {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about .section-rule {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--grid-line-dark), transparent);
}

.page-about .mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .mission-panel {
  border-radius: var(--radius-lg);
  background: var(--deep-blue);
  color: var(--white);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.page-about .mission-panel .panel-head,
.page-about .milestone-aside .panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .mission-panel .panel-body {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5);
  line-height: 1.8;
}

.page-about .mission-panel .panel-body p {
  margin: 0;
}

.page-about .mission-panel .panel-foot {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
  line-height: 1.6;
}

.page-about .trust-icon {
  color: var(--green);
  font-weight: 900;
}

.page-about .mission-side {
  display: grid;
  gap: var(--space-4);
  align-content: start;
}

.page-about .mission-card {
  border: var(--border-light);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4) var(--space-5);
}

.page-about .mission-card h3 {
  margin: 0 0 var(--space-3);
  font-size: 1.05rem;
  font-weight: 800;
}

.page-about .mission-card p {
  margin: 0;
  line-height: 1.7;
}

.page-about .path-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about .path-list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  line-height: 1.5;
}

.page-about .milestone-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline-list::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--china-red), var(--gold) 82%, transparent);
  opacity: 0.5;
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 var(--space-5) 50px;
}

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

.page-about .timeline-item:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.page-about .timeline-dot {
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-gray);
  border-radius: 50%;
}

.page-about .timeline-dot svg {
  width: 20px;
  height: 20px;
  display: block;
}

.page-about .timeline-year {
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--china-red);
  margin: 0 0 var(--space-2);
}

.page-about .timeline-content h3 {
  margin: 0 0 var(--space-2);
  font-size: 1.2rem;
  font-weight: 800;
}

.page-about .timeline-desc {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

.page-about .timeline-detail {
  margin: var(--space-2) 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(26, 29, 38, 0.72);
}

.page-about .milestone-aside {
  background: var(--deep-blue);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-4);
  align-content: start;
  box-shadow: var(--shadow-md);
}

.page-about .milestone-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  margin: 0;
  border-radius: var(--radius-md);
}

.page-about .milestone-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-about .milestone-aside .img-note {
  padding-top: var(--space-2);
  color: rgba(255, 255, 255, 0.7);
}

.page-about .milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-about .milestone-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.92rem;
}

.page-about .milestone-list .data-number {
  color: var(--gold);
  font-size: 1.1rem;
}

.page-about .milestone-aside .text-note {
  color: rgba(255, 255, 255, 0.65);
}

.page-about .capability-panel {
  position: relative;
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding: var(--space-5);
  background-color: var(--deep-blue);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  border-radius: var(--radius-lg);
  color: var(--white);
  overflow: hidden;
}

.page-about .capability-panel::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.28), transparent 70%);
  pointer-events: none;
}

.page-about .capability-top {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.page-about .capability-top h3 {
  margin: 0 0 var(--space-1);
  font-size: 1.5rem;
  font-weight: 800;
}

.page-about .capability-top .text-note {
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

.page-about .capability-view-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-about .capability-view-nav .btn {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
  background: transparent;
}

.page-about .capability-view-nav .btn:hover,
.page-about .capability-view-nav .btn:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .capability-view {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-about .capability-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
}

.page-about .capability-item .data-number {
  font-family: var(--font-num);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}

.page-about .capability-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
}

.page-about .capability-note {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.85);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-3);
}

.page-about .capability-alt-view {
  display: none;
}

.page-about .capability-panel:has(#view-team:target) .capability-default-view {
  display: none;
}

.page-about .capability-panel:has(#view-team:target) .capability-alt-view {
  display: grid;
}

.page-about .capability-panel:has(#view-league:target) .capability-default-view {
  display: grid;
}

.page-about .capability-panel:has(#view-league:target) .capability-alt-view {
  display: none;
}

.page-about .capability-img {
  position: relative;
  z-index: 1;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}

.page-about .capability-img img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-about .capability-img .img-note {
  color: rgba(255, 255, 255, 0.65);
}

.page-about .honor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.page-about .honor-card {
  background: var(--white);
  border-radius: var(--radius-md);
  border-top: 6px solid var(--gold);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.page-about .honor-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.page-about .honor-card h3 {
  margin: var(--space-3) 0 var(--space-2);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.4;
}

.page-about .honor-card p {
  margin: 0;
  line-height: 1.7;
  color: rgba(26, 29, 38, 0.75);
}

.page-about .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--white);
  border: var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.page-about .next-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.page-about .next-card h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 800;
}

.page-about .next-card p {
  margin: 0;
  line-height: 1.7;
  color: rgba(26, 29, 38, 0.72);
}

.page-about .next-card .btn {
  margin-top: auto;
}

@media (hover: hover) {
  .page-about .timeline-detail {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transform: translateY(-4px);
    transition: max-height var(--transition-base), opacity var(--transition-base), transform var(--transition-base);
  }

  .page-about .timeline-item:hover .timeline-detail,
  .page-about .timeline-item:focus-visible .timeline-detail,
  .page-about .timeline-item:focus-within .timeline-detail {
    max-height: 240px;
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 700px) {
  .page-about .about-hero .vert-label {
    display: block;
    position: absolute;
    right: var(--space-4);
    top: var(--space-4);
    writing-mode: vertical-rl;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.72rem;
    color: var(--gold);
    z-index: 2;
    margin: 0;
  }
}

@media (min-width: 820px) {
  .page-about .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-about .page-section {
    padding-top: var(--space-7);
    padding-bottom: var(--space-7);
  }

  .page-about .milestone-wrap {
    grid-template-columns: 1.2fr 0.8fr;
  }

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

@media (min-width: 1000px) {
  .page-about .mission-grid {
    grid-template-columns: 1.35fr 0.65fr;
  }

  .page-about .capability-view {
    grid-template-columns: repeat(4, 1fr);
  }

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

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