.page-about {
  --about-border: #C8D2DC;
  --about-night: #0A1428;
  --about-paper: #FFFFFF;
  --about-soft: #F1F5F9;
  --about-line: #C8D2DC;
  background: var(--about-soft);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding: 1rem 0 0;
  margin-bottom: 0;
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  color: var(--yq-gray);
}

.page-about .breadcrumb a {
  color: var(--yq-blue);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

.page-about .about-hero {
  position: relative;
  background: var(--about-night);
  color: var(--yq-white);
  padding: 3rem 0 3.5rem;
  overflow: hidden;
}

.page-about .about-hero__pitch {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  color: var(--yq-gold);
  opacity: 0.08;
  pointer-events: none;
}

.page-about .about-hero .section-label {
  color: var(--yq-gold);
  border-left-color: var(--yq-gold);
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  margin: 0 0 1rem;
  max-width: 16em;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__subtitle {
  max-width: 52em;
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  z-index: 1;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}

.page-about .about-layout {
  display: block;
  padding-top: 0;
  padding-bottom: 3rem;
}

.page-about .about-chapters {
  background: var(--about-paper);
  border: 1px solid var(--about-border);
  border-top: 3px solid var(--yq-red);
  padding: 1.25rem;
  margin: 1.5rem 0 0;
  position: relative;
  z-index: 2;
}

.page-about .about-chapters .section-label {
  margin-bottom: 0.75rem;
}

.page-about .about-chapters__nav {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 0.5rem;
  padding-bottom: 0.4rem;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-chapters__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  background: var(--about-soft);
  border: 1px solid var(--about-border);
  border-radius: 999px;
  color: var(--yq-ink);
  text-decoration: none;
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  flex-shrink: 0;
  transition: border-color 0.2s, color 0.2s;
}

.page-about .about-chapters__link:hover {
  border-color: var(--yq-blue);
  color: var(--yq-blue);
}

.page-about .about-chapters__num {
  font-family: var(--font-mono);
  color: var(--yq-red);
  font-size: 0.75rem;
}

.page-about .about-chapters__trust {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--about-line);
}

.page-about .about-chapters__trust-label {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--yq-gray);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-chapters__trust ul {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--yq-ink);
}

.page-about .about-chapters__trust li {
  position: relative;
  padding-left: 0.9rem;
}

.page-about .about-chapters__trust li + li {
  margin-top: 0.25rem;
}

.page-about .about-chapters__trust li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.35rem;
  height: 0.35rem;
  background: var(--yq-green);
  border-radius: 50%;
}

.page-about .about-chapters__cta {
  width: 100%;
  margin-top: 1rem;
  text-align: center;
  font-size: 0.8125rem;
}

.page-about .about-story {
  padding: 0;
}

.page-about .about-section {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--about-line);
  scroll-margin-top: 5rem;
}

.page-about .about-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-section__header {
  margin-bottom: 1.5rem;
}

.page-about .about-section h2 {
  margin: 0.25rem 0 0.75rem;
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  line-height: 1.3;
  color: var(--yq-ink);
}

.page-about .about-section__intro {
  margin: 0;
  max-width: 55em;
  color: var(--yq-gray);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .prose {
  max-width: 60em;
}

.page-about .prose p {
  margin: 0 0 1rem;
  color: var(--yq-ink);
  line-height: 1.8;
}

.page-about .about-quote {
  margin: 1.5rem 0 0;
  padding: 1.1rem 1.25rem;
  border-left: 4px solid var(--yq-gold);
  background: var(--about-paper);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--yq-gold);
  color: var(--yq-ink);
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.7;
}

.page-about .about-milestone-media {
  margin: 0 0 2rem;
}

.page-about .about-milestone-media img,
.page-about .about-data-media img,
.page-about .about-honor-media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-milestone-media figcaption,
.page-about .about-data-media figcaption,
.page-about .about-honor-media figcaption {
  padding: 0.5rem 0 0;
  font-size: 0.8125rem;
  color: var(--yq-gray);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.7rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--yq-blue), var(--yq-violet), var(--yq-gold));
  border-radius: 1px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 1.75rem;
}

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

.page-about .about-timeline__marker {
  position: absolute;
  left: 0;
  top: 0.8rem;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--about-paper);
  border: 2px solid var(--yq-blue);
  color: var(--yq-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.page-about .about-timeline__card {
  background: var(--about-paper);
  border: 1px solid var(--about-line);
  padding: 1.25rem;
  border-radius: 2px;
}

.page-about .about-timeline__period {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.page-about .about-timeline__year {
  display: inline-block;
  background: var(--yq-gold);
  color: var(--about-night);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.3;
  padding: 0.15rem 0.6rem;
  transform: rotate(-2deg);
  box-shadow: 0 2px 6px rgba(10, 20, 40, 0.18);
}

.page-about .about-timeline__period-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--yq-gray);
  letter-spacing: 0.05em;
}

.page-about .about-timeline__card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.35;
  color: var(--yq-ink);
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--yq-gray);
}

.page-about .about-data-media {
  margin: 0 0 1.5rem;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 0;
}

.page-about .about-stats__item {
  background: var(--about-paper);
  border: 1px solid var(--about-line);
  padding: 1.25rem;
  border-left: 4px solid var(--yq-blue);
  margin: 0;
}

.page-about .about-stats__item:nth-child(3n) {
  border-left-color: var(--yq-green);
}

.page-about .about-stats__item:nth-child(4n) {
  border-left-color: var(--yq-gold);
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--about-night);
  line-height: 1.2;
  margin: 0;
}

.page-about .about-stats__unit {
  font-size: 0.875rem;
  color: var(--yq-gray);
  margin: 0.25rem 0 0;
  font-family: var(--font-sans);
  font-weight: 600;
}

.page-about .about-stats__desc {
  font-size: 0.8125rem;
  color: var(--yq-gray);
  margin: 0.4rem 0 0;
  line-height: 1.6;
}

.page-about .about-honors {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 0 0 1.5rem;
}

.page-about .about-honors__main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.page-about .about-honor-card {
  background: var(--about-paper);
  border: 1px solid var(--about-line);
  padding: 1.25rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-honor-card:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(10, 20, 40, 0.08);
}

.page-about .about-honor-card--gold {
  border: 2px solid var(--yq-gold);
  box-shadow: 0 6px 18px rgba(233, 196, 106, 0.18);
}

.page-about .about-honor-card--gold:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 28px rgba(233, 196, 106, 0.28);
}

.page-about .about-honor-card__head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.page-about .about-honor-card__trophy {
  color: var(--yq-gold);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-honor-card h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.35;
  color: var(--yq-ink);
}

.page-about .about-honor-card:hover .about-honor-card__trophy {
  animation: about-trophy-glow 0.8s ease;
}

@keyframes about-trophy-glow {
  0% { transform: scale(1); }
  50% { transform: scale(1.12) rotate(-4deg); }
  100% { transform: scale(1); }
}

.page-about .about-honor-card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--yq-gray);
}

.page-about .about-honor-media {
  margin: 0;
}

.page-about .about-honor-media img {
  border: 3px solid var(--yq-gold);
  box-shadow: 0 10px 30px rgba(233, 196, 106, 0.2);
}

.page-about .about-trust-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  background: var(--about-night);
  padding: 1.25rem;
}

.page-about .about-trust-strip__item {
  text-align: center;
  padding: 0.75rem 0.5rem;
}

.page-about .about-trust-strip__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--yq-gold);
  line-height: 1.3;
}

.page-about .about-trust-strip__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .about-org {
  background: var(--about-night);
  padding: 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about .about-org::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--yq-blue), var(--yq-violet), var(--yq-gold));
}

.page-about .about-org__root {
  display: inline-block;
  background: var(--yq-red);
  color: var(--yq-white);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.6rem 1.2rem;
  transform: rotate(-1deg);
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(230, 57, 70, 0.35);
}

.page-about .about-org__connector {
  width: 2px;
  height: 1rem;
  background: var(--yq-gold);
  margin: 0 auto;
}

.page-about .about-org__branches {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  border-top: 2px solid var(--yq-gold);
  padding-top: 0.6rem;
}

.page-about .about-org__branch {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0.75rem 0.5rem;
  transition: background 0.2s, border-color 0.2s;
}

.page-about .about-org__branch:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(233, 196, 106, 0.5);
}

.page-about .about-org__node {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--yq-white);
}

.page-about .about-org__tip {
  display: block;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 0.25rem;
  font-family: var(--font-mono);
}

.page-about .about-commitment {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.page-about .about-commitment__item {
  background: var(--about-paper);
  border: 1px solid var(--about-line);
  padding: 1.25rem;
  display: flex;
  gap: 0.75rem;
}

.page-about .about-commitment__icon {
  color: var(--yq-green);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.page-about .about-commitment__item h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-family: var(--font-serif);
  color: var(--yq-ink);
}

.page-about .about-commitment__item p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--yq-gray);
}

.page-about .about-cta {
  background: linear-gradient(135deg, var(--about-night), #152A4D);
  color: var(--yq-white);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--yq-white);
}

.page-about .about-cta__desc {
  margin: 0.35rem 0 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-cta .btn {
  background: var(--yq-red);
  border-color: var(--yq-red);
  color: var(--yq-white);
}

.page-about .about-cta .btn:hover {
  background: #C92A37;
  border-color: #C92A37;
}

.page-about .about-cta .btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--yq-white);
}

.page-about .about-cta .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .page-about .about-honors {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: start;
    padding-top: 2.5rem;
  }

  .page-about .about-chapters {
    margin: 0;
    position: sticky;
    top: 1.5rem;
  }

  .page-about .about-chapters__nav {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    overflow: visible;
    gap: 0;
    padding-bottom: 0;
  }

  .page-about .about-chapters__link {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    padding: 0.55rem 0.75rem;
    background: none;
    border: none;
    border-left: 3px solid transparent;
    border-radius: 0;
    font-size: 0.875rem;
    width: 100%;
  }

  .page-about .about-chapters__link:hover {
    border-left-color: var(--yq-blue);
    background: var(--about-soft);
    color: var(--yq-blue);
  }

  .page-about .about-chapters__trust ul {
    font-size: 0.8125rem;
  }

  .page-about .about-story {
    padding-top: 0.25rem;
  }

  .page-about .about-section {
    padding: 3.5rem 0;
  }

  .page-about .about-hero {
    padding: 4rem 0 4.5rem;
  }

  .page-about .about-hero h1 {
    font-size: 2.5rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-honor-card,
  .page-about .about-org__branch {
    transition: none;
  }

  .page-about .about-honor-card:hover,
  .page-about .about-honor-card--gold:hover {
    transform: none;
    box-shadow: none;
  }

  .page-about .about-honor-card--gold {
    box-shadow: 0 6px 18px rgba(233, 196, 106, 0.18);
  }

  .page-about .about-honor-card:hover .about-honor-card__trophy {
    animation: none;
  }

  .page-about .about-timeline__year,
  .page-about .about-org__root {
    transform: none;
  }
}