.page-about {
  --about-gold-line: #C9A44D;
  --about-gold-soft: #E8D9A6;
  --about-navy-deep: #0A1A2A;
  --about-navy-card: #0D2436;
  --about-cream-bg: #F7F3E9;
  --about-crimson-dot: #7A2E2E;
  --about-mist-text: #A8B0B8;
  --about-pearl-text: #F2EEDC;
  --about-timeline-width: 2px;
  --about-radius-cut: 12px;
  background-color: #0A1A2A;
  color: #F2EEDC;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  position: relative;
  overflow: clip;
}

.page-about .about-shell {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 32px 80px;
}

.page-about .about-bg-mark {
  position: absolute;
  top: 0;
  right: 0;
  width: 480px;
  height: 640px;
  pointer-events: none;
  opacity: 0.18;
  background:
    linear-gradient(135deg, transparent 46%, #C9A44D 46%, #C9A44D 50%, transparent 50%) 0 0 / 80px 80px,
    linear-gradient(45deg, transparent 46%, #C9A44D 46%, #C9A44D 50%, transparent 50%) 40px 40px / 80px 80px,
    radial-gradient(circle at 70% 30%, rgba(201, 164, 77, 0.35), transparent 60%);
  mask-image: radial-gradient(circle at 70% 40%, black, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 70% 40%, black, transparent 70%);
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  position: relative;
}

.page-about .about-side {
  display: none;
}

.page-about .about-main {
  min-width: 0;
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: #A8B0B8;
  margin-bottom: 24px;
}

.page-about .breadcrumbs a {
  color: #E8D9A6;
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 164, 77, 0.35);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .breadcrumbs a:hover {
  color: #C9A44D;
  border-color: #C9A44D;
}

.page-about .breadcrumbs__sep {
  color: rgba(168, 176, 184, 0.6);
}

.page-about .about-hero {
  padding: 40px 0 48px;
  border-bottom: 1px solid rgba(201, 164, 77, 0.25);
  margin-bottom: 56px;
}

.page-about .about-hero h1 {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  color: #F2EEDC;
  margin: 0 0 20px;
  max-width: 12em;
  letter-spacing: 0.02em;
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.8;
  color: #A8B0B8;
  max-width: 36em;
  margin: 0;
}

.page-about .about-section {
  margin-bottom: 72px;
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .about-section__numero {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: 20px;
  font-weight: 700;
  color: #C9A44D;
  border: 1px solid rgba(201, 164, 77, 0.5);
  padding: 4px 10px;
  transform: skewX(-6deg);
  letter-spacing: 0.05em;
  line-height: 1.4;
  flex-shrink: 0;
}

.page-about .about-section__title {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 700;
  color: #F2EEDC;
  margin: 0 0 4px;
  line-height: 1.3;
}

.page-about .about-section__sub {
  font-size: 14px;
  color: #A8B0B8;
  margin: 0;
  letter-spacing: 0.02em;
}

.page-about .about-prose {
  max-width: 46em;
}

.page-about .about-prose p {
  font-size: 15px;
  line-height: 1.9;
  color: rgba(242, 238, 220, 0.88);
  margin: 0 0 18px;
}

.page-about .about-strong {
  color: #E8D9A6;
  font-weight: 600;
  font-style: normal;
}

.page-about .about-figure {
  margin: 32px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid rgba(201, 164, 77, 0.25);
}

.page-about .about-figure figcaption {
  font-size: 13px;
  color: #A8B0B8;
  line-height: 1.6;
  padding-top: 10px;
  letter-spacing: 0.02em;
}

.page-about .about-figure--origin {
  margin-top: 36px;
}

.page-about .about-figure--origin img {
  border-radius: var(--about-radius-cut);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-about .about-timeline-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 24px;
}

.page-about .about-timeline__axis {
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: var(--about-timeline-width);
  background: linear-gradient(to bottom, #C9A44D, rgba(201, 164, 77, 0.2));
  border-radius: 2px;
}

.page-about .about-timeline__node {
  position: relative;
  padding-bottom: 36px;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #C9A44D;
  border: 2px solid #0A1A2A;
  box-shadow: 0 0 0 2px #C9A44D;
  z-index: 1;
}

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

.page-about .about-timeline__year {
  display: inline-block;
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: 14px;
  font-weight: 700;
  color: #E8D9A6;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  padding: 2px 10px;
  border-left: 3px solid #C9A44D;
  background: rgba(201, 164, 77, 0.08);
}

.page-about .about-timeline__card {
  background: #0D2436;
  border: 1px solid rgba(201, 164, 77, 0.2);
  padding: 20px 22px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.page-about .about-timeline__title {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: 17px;
  font-weight: 700;
  color: #F2EEDC;
  margin: 0 0 6px;
}

.page-about .about-timeline__detail {
  font-size: 14px;
  line-height: 1.75;
  color: #A8B0B8;
  margin: 0;
}

.page-about .about-figure--timeline {
  margin: 0;
  align-self: start;
}

.page-about .about-figure--timeline img {
  border-radius: 50%;
  border: 1px solid rgba(201, 164, 77, 0.3);
}

.page-about .about-consensus {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-consensus__data {
  background: #0D2436;
  border: 1px solid rgba(201, 164, 77, 0.2);
  padding: 28px 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__num {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: 26px;
  font-weight: 700;
  color: #E8D9A6;
  line-height: 1.2;
}

.page-about .about-stat__label {
  font-size: 13px;
  color: #A8B0B8;
  line-height: 1.5;
}

.page-about .about-consensus__text {
  max-width: 46em;
}

.page-about .about-consensus__text p {
  font-size: 15px;
  line-height: 1.9;
  color: rgba(242, 238, 220, 0.88);
  margin: 0 0 18px;
}

.page-about .site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: #C9A44D;
  color: #0A1A2A;
  text-decoration: none;
  border: 1px solid #C9A44D;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.page-about .site-btn:hover {
  background: #E8D9A6;
  border-color: #E8D9A6;
}

.page-about .site-btn:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.3);
}

.page-about .site-btn--outline {
  background: transparent;
  color: #E8D9A6;
  border: 1px solid rgba(201, 164, 77, 0.6);
}

.page-about .site-btn--outline:hover {
  background: rgba(201, 164, 77, 0.12);
  border-color: #C9A44D;
  color: #E8D9A6;
}

.page-about .about-figure--consensus {
  margin: 0;
}

.page-about .about-figure--consensus img {
  border-radius: var(--about-radius-cut);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-service {
  background: #F7F3E9;
  color: #0D2436;
  padding: 36px 32px;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-about .about-service__principle {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: clamp(20px, 1.8vw, 26px);
  font-weight: 700;
  line-height: 1.5;
  color: #0A1A2A;
  margin: 0 0 18px;
}

.page-about .about-service__principle .about-strong {
  color: #7A2E2E;
}

.page-about .about-service p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(13, 36, 54, 0.85);
  margin: 0 0 20px;
  max-width: 44em;
}

.page-about .about-service__list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .about-service__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: #0D2436;
}

.page-about .about-service__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.58em;
  width: 10px;
  height: 10px;
  background: #C9A44D;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-about .about-service__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-service .site-btn {
  background: #0A1A2A;
  border-color: #0A1A2A;
  color: #E8D9A6;
}

.page-about .about-service .site-btn:hover {
  background: #0D2436;
  border-color: #0D2436;
}

.page-about .about-service .site-btn--outline {
  background: transparent;
  border-color: #0A1A2A;
  color: #0A1A2A;
}

.page-about .about-service .site-btn--outline:hover {
  background: rgba(10, 26, 42, 0.08);
  border-color: #0A1A2A;
  color: #0A1A2A;
}

.page-about .about-more {
  border-top: 1px solid rgba(201, 164, 77, 0.2);
  padding-top: 40px;
}

.page-about .about-more__title {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  font-size: 20px;
  font-weight: 700;
  color: #F2EEDC;
  margin: 0 0 20px;
}

.page-about .about-more__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-more__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 24px;
  background: #0D2436;
  border: 1px solid rgba(201, 164, 77, 0.18);
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.page-about .about-more__card:hover {
  border-color: rgba(201, 164, 77, 0.55);
  background: rgba(13, 36, 54, 0.85);
}

.page-about .about-more__tag {
  font-size: 12px;
  font-weight: 600;
  color: #C9A44D;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-more__text {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(242, 238, 220, 0.85);
}

@media (min-width: 700px) {
  .page-about .about-shell {
    padding: 56px 40px 96px;
  }

  .page-about .about-consensus__data {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-about .about-service__list {
    grid-template-columns: 1fr 1fr;
    gap: 12px 20px;
  }

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

  .page-about .about-timeline {
    padding-left: 32px;
  }

  .page-about .about-timeline__axis {
    left: 8px;
  }

  .page-about .about-timeline__node::before {
    left: -32px;
    width: 16px;
    height: 16px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    padding: 64px 48px 100px;
  }

  .page-about .about-grid {
    grid-template-columns: 22% 1fr;
    gap: 56px;
  }

  .page-about .about-side {
    display: block;
    position: relative;
  }

  .page-about .about-side__sticky {
    position: sticky;
    top: 48px;
  }

  .page-about .about-side__intro {
    font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
    font-size: 18px;
    font-weight: 700;
    line-height: 1.6;
    color: #F2EEDC;
    margin: 16px 0 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(201, 164, 77, 0.3);
  }

  .page-about .about-side__timeline-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 32px;
  }

  .page-about .about-side__navlink {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    font-size: 14px;
    color: #A8B0B8;
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  }

  .page-about .about-side__navlink:hover {
    color: #E8D9A6;
    border-left-color: rgba(201, 164, 77, 0.4);
    background: rgba(201, 164, 77, 0.05);
  }

  .page-about .about-side__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid #C9A44D;
    background: transparent;
    flex-shrink: 0;
    transition: background 0.2s ease;
  }

  .page-about .about-side__navlink:hover .about-side__dot {
    background: #C9A44D;
  }

  .page-about .about-side__meta {
    padding: 18px 16px;
    border: 1px solid rgba(201, 164, 77, 0.2);
    background: rgba(13, 36, 54, 0.5);
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  }

  .page-about .about-side__meta-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: #C9A44D;
    text-transform: uppercase;
    margin: 0 0 6px;
  }

  .page-about .about-side__meta-value {
    font-size: 15px;
    font-weight: 600;
    color: #F2EEDC;
    margin: 0 0 6px;
  }

  .page-about .about-side__meta-desc {
    font-size: 13px;
    line-height: 1.6;
    color: #A8B0B8;
    margin: 0;
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: 1fr 240px;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-consensus {
    grid-template-columns: 320px 1fr;
    gap: 36px;
  }

  .page-about .about-figure--consensus {
    grid-column: 1 / -1;
  }

  .page-about .about-hero {
    padding: 48px 0 56px;
    margin-bottom: 64px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-consensus__data {
    grid-template-columns: 1fr;
    align-content: start;
  }

  .page-about .about-consensus {
    grid-template-columns: 280px 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}