.page-about {
  --about-red: #C2372D;
  --about-navy: #1F3A5F;
  --about-gold: #D4AF37;
  --about-snow: #F7F5F0;
  --about-stone: #4A4A4A;
  --about-fog: #EDE8E0;
  --about-sky: #89C6D0;
  --about-dark: #141414;
  --about-snowblue: #A8C4DC;
  --about-pine: #5A7D6E;
  --about-radius-lg: 1.5rem;
}

.page-about {
  background: var(--about-snow);
  color: var(--about-stone);
  overflow-x: hidden;
}

.page-about__breadcrumb {
  background: var(--about-navy);
  padding: 0.75rem 0 0;
}

.page-about__breadcrumb .breadcrumb__list {
  max-width: 76rem;
  margin: 0 auto;
  padding: 0.25rem 1.25rem 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.875rem;
}

.page-about__breadcrumb .breadcrumb__item {
  color: rgba(247, 245, 240, 0.65);
}

.page-about__breadcrumb .breadcrumb__item a {
  color: var(--about-gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.page-about__breadcrumb .breadcrumb__item a:hover {
  border-color: var(--about-gold);
}

.page-about__breadcrumb .breadcrumb__item[aria-current="page"] {
  color: #ffffff;
}

.page-about__hero {
  position: relative;
  min-height: 65vh;
  display: flex;
  align-items: flex-end;
  background: var(--about-navy);
  isolation: isolate;
}

.page-about__hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.page-about__hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, rgba(20, 20, 20, 0.78) 0%, rgba(31, 58, 95, 0.55) 52%, rgba(31, 58, 95, 0.18) 100%);
  z-index: -1;
}

.page-about__hero-sweep {
  position: absolute;
  right: -12%;
  top: -18%;
  width: 55%;
  height: 140%;
  background: linear-gradient(135deg, transparent 0%, transparent 42%, rgba(212, 175, 55, 0.16) 43%, rgba(194, 55, 45, 0.28) 47%, transparent 48%, transparent 100%);
  transform: skewX(-14deg);
  z-index: 0;
  pointer-events: none;
}

.page-about__hero-content {
  max-width: 76rem;
  margin: 0 auto;
  padding: 4rem 1.25rem 3.5rem;
  width: 100%;
  position: relative;
  z-index: 2;
}

.page-about__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0.5rem 1rem;
  background: rgba(194, 55, 45, 0.85);
  color: #ffffff;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  border-radius: 0.25rem;
  backdrop-filter: blur(4px);
}

.page-about__kicker::before {
  content: "";
  display: inline-block;
  width: 0.375rem;
  height: 0.375rem;
  background: var(--about-gold);
  border-radius: 50%;
}

.page-about__title {
  margin: 0 0 1rem;
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
  font-weight: 900;
  font-size: clamp(2.2rem, 5.5vw, 3.75rem);
  line-height: 1.12;
  color: #ffffff;
  letter-spacing: 0.02em;
  max-width: 9ch;
}

.page-about__subtitle {
  margin: 0 0 2rem;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
  font-size: clamp(0.95rem, 1.4vw, 1.125rem);
  line-height: 1.85;
  color: rgba(247, 245, 240, 0.88);
  max-width: 42rem;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__hero-actions .btn {
  padding: 0.8rem 1.6rem;
  border-radius: 0.25rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about__hero-actions .btn--primary {
  background: var(--about-red);
  color: #ffffff;
}

.page-about__hero-actions .btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(194, 55, 45, 0.35);
}

.page-about__hero-actions .btn--outline {
  border: 1px solid rgba(247, 245, 240, 0.6);
  color: #ffffff;
}

.page-about__hero-actions .btn--outline:hover {
  border-color: var(--about-gold);
  color: var(--about-gold);
  transform: translateY(-2px);
}

.page-about__hero-meta {
  position: absolute;
  right: 1.25rem;
  bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  background: rgba(20, 20, 20, 0.45);
  border-left: 3px solid var(--about-gold);
  backdrop-filter: blur(6px);
  z-index: 2;
}

.page-about__hero-meta-item {
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-size: 0.8125rem;
  color: rgba(247, 245, 240, 0.85);
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.page-about__hero-meta-num {
  font-family: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--about-gold);
}

.page-about__hero-meta-unit {
  font-size: 0.75rem;
  color: rgba(247, 245, 240, 0.7);
}

.page-about__chapters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  max-width: 76rem;
  margin: 0 auto;
  padding: 0 1.25rem;
  background: var(--about-snow);
  border-bottom: 1px solid #e2dbd0;
  position: sticky;
  top: 0;
  z-index: 20;
}

.page-about__chapters-label {
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--about-stone);
  padding-right: 0.5rem;
  border-right: 2px solid var(--about-gold);
  margin-right: 0.25rem;
}

.page-about__chapters-link {
  display: inline-block;
  padding: 0.85rem 0.15rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--about-stone);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.page-about__chapters-link:hover {
  color: var(--about-red);
  border-bottom-color: var(--about-red);
}

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

.page-about__section-heading {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.page-about__section-heading--alt {
  margin-bottom: 2.5rem;
}

.page-about__section-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  flex: 0 0 auto;
  background: var(--about-navy);
  color: #ffffff;
  font-family: "Roboto Mono", monospace;
  font-weight: 700;
  font-size: 1.125rem;
  border-radius: 0.375rem;
  transform: skewX(-6deg);
}

.page-about__section-num--gold {
  background: var(--about-gold);
  color: var(--about-dark);
}

.page-about__section-overline {
  margin: 0 0 0.25rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-red);
}

.page-about__section-title {
  margin: 0;
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.2;
  color: var(--about-navy);
  letter-spacing: 0.02em;
}

.page-about__origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about__origin-copy .prose {
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 1.25rem;
  color: #3d3d3d;
}

.page-about__origin-copy strong {
  color: var(--about-red);
  font-weight: 700;
}

.page-about__quote {
  margin: 2rem 0 0;
  padding: 1.5rem 1.75rem;
  background: var(--about-fog);
  border-left: 4px solid var(--about-gold);
  border-radius: 0 0.75rem 0.75rem 0;
}

.page-about__quote p {
  margin: 0 0 0.5rem;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-style: italic;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--about-navy);
}

.page-about__quote cite {
  font-style: normal;
  font-size: 0.8125rem;
  color: var(--about-stone);
}

.page-about__origin-panel {
  display: grid;
  gap: 0.75rem;
}

.page-about__origin-fact {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.1rem 1.25rem;
  background: linear-gradient(135deg, #ffffff 0%, var(--about-fog) 100%);
  border-radius: 0.6rem;
  border: 1px solid #e4ddcf;
  transition: box-shadow 0.2s, transform 0.2s;
}

.page-about__origin-fact:hover {
  box-shadow: 0 6px 16px rgba(31, 58, 95, 0.1);
  transform: translateX(4px);
}

.page-about__origin-fact-icon {
  color: var(--about-gold);
  font-size: 1.125rem;
}

.page-about__origin-fact-label {
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--about-navy);
  letter-spacing: 0.06em;
}

.page-about__origin-fact-value {
  margin-left: auto;
  font-family: "Noto Serif SC", serif;
  font-size: 0.9375rem;
  color: var(--about-stone);
  text-align: right;
}

.page-about__milestones {
  padding: 4.5rem 0 4rem;
  background: linear-gradient(160deg, var(--about-fog) 0%, #f2ece3 100%);
  position: relative;
}

.page-about__milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--about-navy) 0%, var(--about-navy) 30%, var(--about-gold) 30%, var(--about-gold) 46%, var(--about-red) 46%, var(--about-red) 100%);
}

.page-about__milestones-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about__milestones-media {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(31, 58, 95, 0.16);
  transform: rotate(-1deg);
}

.page-about__milestones-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about__timeline {
  position: relative;
  margin: 0;
  padding: 1rem 0 0 0;
  list-style: none;
}

.page-about__timeline-item {
  position: relative;
  padding: 0 0 2.5rem 2rem;
  margin: 0;
}

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--about-gold) 0%, var(--about-navy) 100%);
}

.page-about__timeline-item:last-child::before {
  bottom: calc(100% - 3.5rem);
}

.page-about__timeline-dot {
  position: absolute;
  left: -0.5rem;
  top: 0.375rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--about-gold);
  border: 3px solid var(--about-fog);
  box-shadow: 0 0 0 2px var(--about-navy);
  z-index: 1;
}

.page-about__timeline-item:nth-child(2) .page-about__timeline-dot {
  background: var(--about-sky);
  box-shadow: 0 0 0 2px var(--about-navy);
}

.page-about__timeline-item:nth-child(3) .page-about__timeline-dot {
  background: var(--about-red);
  box-shadow: 0 0 0 2px var(--about-navy);
}

.page-about__timeline-item:nth-child(4) .page-about__timeline-dot {
  background: var(--about-pine);
  box-shadow: 0 0 0 2px var(--about-navy);
}

.page-about__timeline-date {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  background: var(--about-navy);
  color: #ffffff;
  font-family: "Roboto Mono", monospace;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 0.25rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.page-about__timeline-title {
  margin: 0 0 0.5rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--about-navy);
}

.page-about__timeline-copy {
  margin: 0;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: #4d4d4d;
}

.page-about__timeline-copy strong {
  color: var(--about-red);
  font-weight: 700;
}

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

.page-about__scale-intro {
  margin: -1.5rem 0 2.5rem;
  padding-left: 4.25rem;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 1.0625rem;
  color: var(--about-stone);
}

.page-about__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.875rem;
  margin-bottom: 2.5rem;
}

.page-about__stat {
  position: relative;
  padding: 1.5rem 1.25rem;
  background: var(--about-fog);
  border-radius: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transform: skewX(-2deg);
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about__stat:hover {
  transform: skewX(-2deg) translateY(-3px);
  box-shadow: 0 10px 22px rgba(31, 58, 95, 0.12);
}

.page-about__stat--red {
  background: var(--about-red);
  color: #ffffff;
}

.page-about__stat--gold {
  background: var(--about-gold);
  color: var(--about-dark);
}

.page-about__stat--navy {
  background: var(--about-navy);
  color: #ffffff;
}

.page-about__stat--blue {
  background: var(--about-snowblue);
  color: var(--about-navy);
}

.page-about__stat--green {
  background: var(--about-pine);
  color: #ffffff;
}

.page-about__stat-num {
  font-family: "Roboto Mono", "SFMono-Regular", monospace;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
}

.page-about__stat-unit {
  font-size: 0.6em;
  font-weight: 400;
  margin-left: 0.25rem;
  opacity: 0.8;
}

.page-about__stat-label {
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  opacity: 0.9;
}

.page-about__scale-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about__scale-card {
  background: #ffffff;
  border-radius: 1rem;
  padding: 1.5rem 1.5rem 1.75rem;
  border: 1px solid #e8e1d5;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}

.page-about__scale-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, transparent 50%, rgba(212, 175, 55, 0.2) 50%);
}

.page-about__scale-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(31, 58, 95, 0.14);
}

.page-about__scale-card .card__title {
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--about-navy);
  margin-bottom: 1rem;
  position: relative;
  padding-left: 1rem;
}

.page-about__scale-card .card__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2rem;
  bottom: 0.2rem;
  width: 0.3125rem;
  background: var(--about-gold);
  border-radius: 0.25rem;
}

.page-about__scale-card .card__body p {
  margin: 0;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: #3d3d3d;
}

.page-about__scale-card.card--red {
  background: linear-gradient(135deg, #fdf3f1 0%, #fff 70%);
  border-color: #ecd4d0;
}

.page-about__scale-card.card--red .card__title::before {
  background: var(--about-red);
}

.page-about__scale-card.card--gold {
  background: linear-gradient(135deg, #fbf7e8 0%, #fff 70%);
  border-color: #e9dfb8;
}

.page-about__scale-card.card--gold .card__title::before {
  background: var(--about-gold);
}

.page-about__banner {
  padding: 4rem 1.25rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about__banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(115deg, var(--about-dark) 0%, var(--about-navy) 56%, #2a4d78 100%);
  transform: skewY(-2deg) scale(1.05);
  z-index: 0;
}

.page-about__banner-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.page-about__banner-mark {
  color: var(--about-gold);
  font-size: 2rem;
  line-height: 1;
}

.page-about__banner-text {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 900;
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  line-height: 1.55;
  color: #ffffff;
  letter-spacing: 0.04em;
}

.page-about__banner .btn--gold {
  background: var(--about-gold);
  color: var(--about-dark);
  padding: 0.8rem 1.5rem;
  border-radius: 0.25rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about__banner .btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(212, 175, 55, 0.35);
}

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

.page-about__values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.page-about__value-block {
  padding: 2rem 1.75rem;
  background: #ffffff;
  border-radius: 1rem;
  border: 1px solid #e5ddcf;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}

.page-about__value-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--about-gold);
}

.page-about__value-block:nth-child(2)::before {
  background: var(--about-red);
}

.page-about__value-block:nth-child(3)::before {
  background: var(--about-sky);
}

.page-about__value-block:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(31, 58, 95, 0.12);
}

.page-about__value-icon {
  display: inline-flex;
  width: 3rem;
  height: 3rem;
  align-items: center;
  justify-content: center;
  background: var(--about-fog);
  border-radius: 50%;
  font-size: 1.4rem;
  color: var(--about-navy);
  margin-bottom: 1.25rem;
}

.page-about__value-title {
  margin: 0 0 0.75rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 800;
  font-size: 1.375rem;
  color: var(--about-navy);
}

.page-about__value-block .prose {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: #4d4d4d;
}

.page-about__values-media {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  align-items: center;
}

.page-about__values-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 1rem;
  object-fit: cover;
  box-shadow: 0 14px 32px rgba(31, 58, 95, 0.18);
}

.page-about__values-note .prose {
  font-size: 1rem;
  line-height: 1.9;
  color: #3d3d3d;
  margin-bottom: 1.25rem;
}

.page-about__values-note .btn--outline {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.8rem 1.6rem;
  border: 2px solid var(--about-navy);
  border-radius: 0.25rem;
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--about-navy);
  text-decoration: none;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}

.page-about__values-note .btn--outline:hover {
  background: var(--about-navy);
  color: #ffffff;
  transform: translateY(-2px);
}

@media (min-width: 640px) {
  .page-about__hero-meta {
    flex-direction: row;
    gap: 1.25rem;
  }

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

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

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

@media (min-width: 860px) {
  .page-about__hero {
    min-height: 72vh;
  }

  .page-about__origin-grid {
    grid-template-columns: 3fr 2fr;
    gap: 3rem;
  }

  .page-about__milestones-wrap {
    grid-template-columns: 5fr 7fr;
    gap: 2.5rem;
    align-items: start;
  }

  .page-about__milestones-media {
    position: sticky;
    top: 4rem;
  }

  .page-about__scale {
    padding: 6rem 0;
  }

  .page-about__stats {
    grid-template-columns: repeat(6, 1fr);
  }

  .page-about__scale-columns {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about__timeline-item {
    padding-left: 2.5rem;
  }

  .page-about__timeline-dot {
    left: -0.5625rem;
    width: 1.125rem;
    height: 1.125rem;
  }

  .page-about__banner {
    padding: 5rem 1.25rem;
  }

  .page-about__values-media {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (min-width: 1024px) {
  .page-about__hero-meta {
    bottom: 3rem;
    right: 3rem;
  }

  .page-about__chapters-link {
    font-size: 0.9375rem;
  }

  .page-about__values {
    padding: 6rem 0;
  }
}