.page-about {
  --about-sidebar-w: 256px;
  --about-gap: clamp(24px, 4vw, 48px);
  --about-radius: var(--ky-radius-lg);
  position: relative;
  isolation: isolate;
  background-color: var(--ky-white);
  color: var(--ky-navy);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(to right, rgba(10, 30, 63, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10, 30, 63, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.page-about .about-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
  max-width: 1240px;
  margin-inline: auto;
  padding-top: 44px;
  padding-bottom: 80px;
}

.page-about .about-sidebar-inner {
  background: var(--ky-navy);
  border: 1px solid rgba(245, 247, 250, 0.08);
  border-radius: var(--ky-radius-lg);
  padding: 24px;
  color: var(--ky-white);
  box-shadow: var(--ky-shadow-lift);
  position: relative;
  overflow: hidden;
}

.page-about .about-sidebar-inner::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.28), transparent 68%);
  top: -70px;
  right: -70px;
  pointer-events: none;
}

.page-about .about-sidebar-label {
  font-family: var(--ky-font-index);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(245, 247, 250, 0.58);
  margin-bottom: 22px;
}

.page-about .about-sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  z-index: 1;
}

.page-about .about-sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--ky-font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  color: rgba(245, 247, 250, 0.84);
  text-decoration: none;
  padding: 10px 12px;
  margin-inline: -12px;
  border-radius: var(--ky-radius-md);
  transition: background-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.page-about .about-sidebar-link:hover {
  background: rgba(255, 107, 53, 0.14);
  color: var(--ky-white);
  transform: translateX(4px);
}

.page-about .about-sidebar-num {
  font-family: var(--ky-font-data);
  font-size: 13px;
  color: var(--ky-gold);
  min-width: 26px;
}

.page-about .about-sidebar-note {
  font-family: var(--ky-font-index);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.46);
  border-top: 1px solid rgba(245, 247, 250, 0.12);
  margin-top: 22px;
  padding-top: 18px;
}

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

.page-about .about-hero {
  padding: 8px 0 24px;
}

.page-about .about-hero .section-index {
  margin-bottom: 18px;
}

.page-about .about-hero h1 {
  font-family: var(--ky-font-head);
  font-size: clamp(28px, 5.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ky-navy);
  margin: 0 0 20px;
  max-width: 18em;
}

.page-about .about-hero-lead {
  font-family: var(--ky-font-body);
  font-size: 18px;
  line-height: 1.85;
  color: rgba(10, 30, 63, 0.74);
  max-width: 38em;
  margin-bottom: 22px;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-family: var(--ky-font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(10, 30, 63, 0.52);
  border-block: 1px solid var(--ky-grid);
  padding-block: 14px;
  margin-bottom: 22px;
}

.page-about .about-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-hero-meta span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ky-orange);
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: cover;
  border-radius: var(--ky-radius-lg);
  box-shadow: var(--ky-shadow-card);
}

.page-about .section-block {
  scroll-margin-top: 28px;
  padding-block: 44px 20px;
  border-bottom: 1px solid var(--ky-grid);
}

.page-about .section-index {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ky-font-data);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ky-orange);
  margin-bottom: 10px;
}

.page-about .section-index::before {
  content: "";
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--ky-orange);
}

.page-about .section-block h2 {
  font-family: var(--ky-font-head);
  font-size: clamp(24px, 3.8vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ky-navy);
  margin: 0 0 16px;
}

.page-about .section-lead {
  font-family: var(--ky-font-body);
  font-size: 17px;
  line-height: 1.75;
  color: rgba(10, 30, 63, 0.68);
  max-width: 46em;
  margin-bottom: 30px;
}

.page-about .about-start-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-bottom: 26px;
}

.page-about .about-start-text p {
  font-family: var(--ky-font-body);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(10, 30, 63, 0.82);
  margin: 0 0 16px;
}

.page-about .about-start-text p:last-child {
  margin-bottom: 0;
}

.page-about .about-evidence {
  border-radius: var(--ky-radius-lg);
  padding: 26px;
  background: var(--ky-navy);
  color: var(--ky-white);
  border: 1px solid rgba(255, 215, 0, 0.2);
  position: relative;
  overflow: hidden;
}

.page-about .about-evidence::after {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.12), transparent 70%);
  bottom: -40px;
  right: -30px;
  pointer-events: none;
}

.page-about .about-evidence-label {
  font-family: var(--ky-font-index);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ky-gold);
  margin-bottom: 18px;
}

.page-about .about-evidence-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-evidence-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--ky-font-body);
  font-size: 15px;
  line-height: 1.6;
  color: rgba(245, 247, 250, 0.92);
}

.page-about .about-evidence-list li::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ky-gold);
  transform: translateY(-2px);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .about-loop-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--ky-radius-lg);
  box-shadow: var(--ky-shadow-card);
}

.page-about .about-loop-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}

.page-about .about-loop-card {
  padding: 26px;
  border: 1px solid var(--ky-grid);
  border-radius: var(--ky-radius-lg);
  background: var(--ky-white);
  box-shadow: var(--ky-shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.page-about .about-loop-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ky-shadow-lift);
  border-color: rgba(255, 107, 53, 0.35);
}

.page-about .about-loop-card h3 {
  font-family: var(--ky-font-body);
  font-size: 20px;
  font-weight: 700;
  color: var(--ky-navy);
  margin: 16px 0 10px;
}

.page-about .about-loop-card p {
  font-family: var(--ky-font-body);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(10, 30, 63, 0.74);
  margin: 0;
}

.page-about .about-verification {
  background: var(--ky-navy);
  border-radius: var(--ky-radius-lg);
  padding: 44px clamp(20px, 4vw, 48px);
  color: var(--ky-white);
  border: none;
  position: relative;
  overflow: hidden;
}

.page-about .about-verification::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(245, 247, 250, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(245, 247, 250, 0.045) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}

.page-about .about-verification .section-index,
.page-about .about-verification h2,
.page-about .about-verification .section-lead {
  position: relative;
  z-index: 1;
}

.page-about .about-verification .section-index {
  color: var(--ky-gold);
}

.page-about .about-verification .section-index::before {
  background: var(--ky-gold);
}

.page-about .about-verification h2 {
  color: var(--ky-white);
}

.page-about .about-verification .section-lead {
  color: rgba(245, 247, 250, 0.72);
}

.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.page-about .about-flow-step {
  background: rgba(245, 247, 250, 0.06);
  border: 1px solid rgba(245, 247, 250, 0.09);
  border-radius: var(--ky-radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.page-about .about-flow-step:hover {
  background: rgba(245, 247, 250, 0.1);
  transform: translateY(-2px);
}

.page-about .about-flow-step .data-num {
  font-family: var(--ky-font-data);
  font-size: 26px;
  color: var(--ky-gold);
  line-height: 1;
  margin-bottom: 12px;
}

.page-about .about-flow-step h3 {
  font-family: var(--ky-font-body);
  font-size: 18px;
  font-weight: 700;
  color: var(--ky-white);
  margin: 0 0 8px;
}

.page-about .about-flow-step p {
  font-family: var(--ky-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.68);
  margin: 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  position: relative;
  z-index: 1;
}

.page-about .about-stat {
  background: var(--ky-navy-2);
  border: 1px solid rgba(255, 215, 0, 0.16);
  border-radius: var(--ky-radius-md);
  padding: 20px 14px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.page-about .about-stat-num {
  font-family: var(--ky-font-data);
  font-size: 40px;
  line-height: 1;
  color: var(--ky-gold);
}

.page-about .about-stat-unit {
  font-family: var(--ky-font-index);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(245, 247, 250, 0.62);
}

.page-about .about-design-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 24px;
}

.page-about .about-design-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--ky-white);
  border: 1px solid var(--ky-grid);
  border-radius: var(--ky-radius-md);
  padding: 20px 22px;
  box-shadow: var(--ky-shadow-card);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .about-design-step:hover {
  border-color: rgba(255, 107, 53, 0.4);
  transform: translateX(4px);
}

.page-about .about-design-step .data-num {
  font-family: var(--ky-font-data);
  font-size: 22px;
  color: var(--ky-orange);
  min-width: 32px;
  padding-top: 4px;
}

.page-about .about-design-step p {
  font-family: var(--ky-font-body);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(10, 30, 63, 0.84);
  margin: 0;
}

.page-about .about-design-note {
  background: var(--ky-navy);
  color: rgba(245, 247, 250, 0.82);
  border-radius: var(--ky-radius-md);
  padding: 18px 22px;
  font-family: var(--ky-font-body);
  font-size: 14px;
  line-height: 1.75;
  border-left: 4px solid var(--ky-gold);
}

.page-about .about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-left: 34px;
  margin-top: 32px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--ky-gold), var(--ky-navy-2) 72%);
}

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

.page-about .about-timeline-node {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ky-gold);
  box-shadow: 0 0 0 5px rgba(255, 215, 0, 0.18);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-timeline-item:hover .about-timeline-node {
  transform: scale(1.2);
  box-shadow: 0 0 0 9px rgba(255, 215, 0, 0.14);
}

.page-about .about-timeline-content {
  background: var(--ky-white);
  border: 1px solid var(--ky-grid);
  border-radius: var(--ky-radius-md);
  padding: 22px;
  box-shadow: var(--ky-shadow-card);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .about-timeline-item:hover .about-timeline-content {
  border-color: var(--ky-gold);
  transform: translateY(-3px);
}

.page-about .about-timeline-phase {
  display: block;
  font-family: var(--ky-font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ky-orange);
  margin-bottom: 8px;
}

.page-about .about-timeline-content h3 {
  font-family: var(--ky-font-body);
  font-size: 18px;
  font-weight: 700;
  color: var(--ky-navy);
  margin: 0 0 8px;
}

.page-about .about-timeline-content p {
  font-family: var(--ky-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(10, 30, 63, 0.72);
  margin: 0;
}

.page-about .about-xinjiang-figure img {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--ky-radius-lg);
  box-shadow: var(--ky-shadow-card);
  margin-bottom: 28px;
}

.page-about .about-xinjiang-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-xinjiang-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px;
  background: var(--ky-white);
  border: 1px solid var(--ky-grid);
  border-radius: var(--ky-radius-md);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.page-about .about-xinjiang-item:hover {
  background: #fff;
  border-color: rgba(255, 107, 53, 0.3);
}

.page-about .about-xinjiang-dot {
  flex: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  margin-top: 5px;
  box-shadow: 0 0 0 5px rgba(10, 30, 63, 0.05);
}

.page-about .about-xinjiang-dot--navy {
  background: var(--ky-navy);
}

.page-about .about-xinjiang-dot--orange {
  background: var(--ky-orange);
}

.page-about .about-xinjiang-dot--green {
  background: var(--ky-green);
}

.page-about .about-xinjiang-dot--gold {
  background: var(--ky-gold);
}

.page-about .about-xinjiang-item h3 {
  font-family: var(--ky-font-body);
  font-size: 16px;
  font-weight: 700;
  color: var(--ky-navy);
  margin: 0 0 6px;
}

.page-about .about-xinjiang-item p {
  font-family: var(--ky-font-body);
  font-size: 14px;
  line-height: 1.65;
  color: rgba(10, 30, 63, 0.72);
  margin: 0;
}

.page-about .about-reading {
  padding-block: 48px 16px;
  text-align: center;
}

.page-about .about-reading h2 {
  font-family: var(--ky-font-head);
  font-size: 22px;
  color: var(--ky-navy);
  margin: 0 0 12px;
}

.page-about .about-reading-desc {
  font-family: var(--ky-font-body);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(10, 30, 63, 0.66);
  max-width: 34em;
  margin: 0 auto 20px;
}

.page-about .about-reading-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.page-about .about-reading-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border: 1px solid var(--ky-grid);
  background: var(--ky-white);
  color: var(--ky-navy);
  padding: 10px 20px;
  border-radius: var(--ky-radius-pill);
  font-family: var(--ky-font-body);
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-reading-link:hover {
  background: var(--ky-navy);
  color: var(--ky-white);
  border-color: var(--ky-navy);
  transform: translateY(-2px);
}

@media (min-width: 768px) {
  .page-about .about-start-cols {
    grid-template-columns: 1.4fr 1fr;
    gap: 24px;
  }

  .page-about .about-loop-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .about-design-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .about-xinjiang-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .page-about .about-xinjiang-figure img {
    height: 320px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-sidebar-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    padding-inline: var(--ky-gutter);
  }

  .page-about .about-sidebar-inner {
    position: sticky;
    top: 28px;
  }

  .page-about .about-content {
    max-width: 860px;
  }

  .page-about .about-timeline {
    flex-direction: row;
    gap: 16px;
    padding-left: 0;
    margin-top: 44px;
  }

  .page-about .about-timeline::before {
    width: auto;
    height: 2px;
    left: 9px;
    right: 9px;
    top: 9px;
    bottom: auto;
    background: linear-gradient(to right, var(--ky-gold) 0%, var(--ky-navy-2) 72%);
  }

  .page-about .about-timeline-item {
    flex: 1;
    padding-top: 34px;
  }

  .page-about .about-timeline-node {
    position: absolute;
    left: 0;
    top: 0;
  }

  .page-about .about-timeline-content {
    height: 100%;
  }
}