.page-about {
  --about-rail-w: 176px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(40px, 7vw, 80px);
}

.page-about .about-hero .display {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.1rem, 10vw, 5.4rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 14px 0 0;
  color: var(--text);
}

.page-about .about-hero .display em {
  font-style: normal;
  font-weight: 300;
  color: var(--red-gold);
}

.page-about .about-hero .lede {
  max-width: 62ch;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .hero-scale {
  position: relative;
  height: 32px;
  margin: clamp(26px, 4vw, 46px) 0 clamp(20px, 3vw, 32px);
  border-bottom: 1px solid var(--line-strong);
  background-image: repeating-linear-gradient(
    to right,
    var(--line-strong) 0 1px,
    transparent 1px 11px
  );
  background-repeat: repeat-x;
  background-position: left bottom;
  background-size: auto 13px;
}

.page-about .hero-scale::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: min(34%, 240px);
  height: 2px;
  background: linear-gradient(to right, var(--red-gold), rgba(200, 162, 74, 0));
}

.page-about .stat-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 18px;
  margin: 0;
}

.page-about .stat dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--text-faint);
}

.page-about .stat dd {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 8px 0 0;
}

.page-about .stat .data-figure {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  font-weight: 400;
  color: var(--cold-cyan);
  line-height: 1;
}

.page-about .stat .data-label {
  font-size: 0.8rem;
  color: var(--text-soft);
}

/* ---------- 起点与定位 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 48px);
  align-items: start;
}

.page-about .origin-main p {
  max-width: 60ch;
  margin-top: 16px;
}

.page-about .origin-main a {
  color: var(--cold-cyan);
  border-bottom: 1px solid rgba(52, 209, 218, 0.4);
}

.page-about .origin-main a:hover {
  border-bottom-color: var(--cold-cyan);
}

.page-about .origin-aside {
  background: var(--star-blue);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 28px);
  box-shadow: var(--shadow-float);
}

.page-about .aside-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--red-gold);
  margin: 0 0 14px;
}

.page-about .aside-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .aside-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 8px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-soft);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-hair);
}

.page-about .aside-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .aside-list .mono {
  color: var(--red-gold);
  font-size: 0.78rem;
}

/* ---------- 阶段刻度轴 ---------- */
.page-about .timeline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .rail-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--text-faint);
  margin: 0 0 12px;
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .rail-list::-webkit-scrollbar {
  display: none;
}

.page-about .rail-list li {
  flex: 0 0 auto;
}

.page-about .rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 0.84rem;
  color: var(--text-soft);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  border-color: var(--red-gold);
  color: var(--text);
  background: rgba(200, 162, 74, 0.08);
}

.page-about .rail-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mist-gray);
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .rail-list a:hover .rail-dot,
.page-about .rail-list a:focus-visible .rail-dot {
  background: var(--red-gold);
  box-shadow: 0 0 0 4px rgba(200, 162, 74, 0.16);
}

.page-about .rail-num {
  color: var(--text-faint);
  font-size: 0.72rem;
}

.page-about .rail-name {
  letter-spacing: 0.04em;
}

.page-about .timeline-flow {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .stage {
  position: relative;
  padding-left: 22px;
  scroll-margin-top: 120px;
}

.page-about .stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--line-strong), rgba(147, 166, 188, 0));
}

.page-about .stage::after {
  content: "";
  position: absolute;
  left: -3px;
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--red-gold);
}

.page-about .stage-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--red-gold);
  border: 1px solid rgba(200, 162, 74, 0.42);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
  margin: 0 0 14px;
}

.page-about .stage-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0 0 12px;
}

.page-about .stage p {
  max-width: 62ch;
  margin-top: 12px;
}

.page-about .stage-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cold-cyan);
  letter-spacing: 0.02em;
}

/* ---------- 履约网络 ---------- */
.page-about .network-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .net-map {
  position: relative;
  display: block;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--star-blue);
}

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

.page-about .net-node {
  position: absolute;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  cursor: help;
  outline: none;
}

.page-about .net-node i {
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--cold-cyan);
  box-shadow: 0 0 0 5px rgba(52, 209, 218, 0.18);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .net-node:hover i,
.page-about .net-node:focus-visible i {
  transform: scale(1.35);
  box-shadow: 0 0 0 8px rgba(52, 209, 218, 0.24);
}

.page-about .net-tip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translate(-50%, 6px);
  width: max-content;
  max-width: 210px;
  background: var(--night-blue);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  z-index: 3;
}

.page-about .net-node:hover .net-tip,
.page-about .net-node:focus-visible .net-tip {
  opacity: 1;
  transform: translate(-50%, 0);
}

.page-about .net-node-1 { left: 68%; top: 34%; }
.page-about .net-node-2 { left: 62%; top: 74%; }
.page-about .net-node-3 { left: 66%; top: 14%; }
.page-about .net-node-4 { left: 52%; top: 52%; }
.page-about .net-node-5 { left: 30%; top: 62%; }
.page-about .net-node-6 { left: 20%; top: 26%; }

.page-about .network-main .media-caption {
  margin-top: 12px;
}

.page-about .network-aside {
  background: var(--star-blue);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 28px);
}

.page-about .network-aside p {
  font-size: 0.92rem;
}

.page-about .aside-plain {
  list-style: none;
  margin: 18px 0 16px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .aside-plain li {
  position: relative;
  padding-left: 18px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .aside-plain li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--cold-cyan);
}

.page-about .network-aside .btn {
  margin-top: 18px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  border-radius: var(--radius-lg);
}

.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(22px, 3vw, 34px);
  align-items: start;
}

.page-about .team-main .lede {
  max-width: 58ch;
}

.page-about .bar-chart {
  display: grid;
  gap: 18px;
  margin: clamp(24px, 4vw, 36px) 0;
}

.page-about .bar-row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "label value"
    "track track";
  gap: 8px 14px;
  align-items: center;
}

.page-about .bar-label {
  grid-area: label;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.page-about .bar-value {
  grid-area: value;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--copper-ink);
}

.page-about .bar-track {
  grid-area: track;
  display: block;
  height: 8px;
  border-radius: var(--radius-pill);
  background: rgba(12, 15, 20, 0.09);
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  border-radius: var(--radius-pill);
}

.page-about .bar-fill-a { background: linear-gradient(to right, var(--copper-ink), #D98A4E); }
.page-about .bar-fill-b { background: linear-gradient(to right, #1F7C86, var(--cold-cyan)); }
.page-about .bar-fill-c { background: linear-gradient(to right, #7C8B9E, var(--mist-gray)); }

.page-about .team-notes {
  display: grid;
  gap: 22px;
  border-top: 1px solid rgba(12, 15, 20, 0.14);
  padding-top: 24px;
}

.page-about .note-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
  margin: 0 0 8px;
}

.page-about .about-team .team-notes p {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.page-about .team-aside .media {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--star-blue);
}

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

.page-about .team-aside .media-caption {
  margin-top: 10px;
  color: var(--ink-soft);
}

.page-about .team-aside .text-soft {
  display: block;
  margin-top: 16px;
  font-size: 0.86rem;
  color: var(--ink-soft);
}

/* ---------- 资质徽章轨道 ---------- */
.page-about .credential-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(22px, 3vw, 34px);
  align-items: start;
}

.page-about .credential-media {
  margin: 0 0 18px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--star-blue);
}

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

.page-about .credential-main p {
  max-width: 46ch;
}

.page-about .badge-rail {
  list-style: none;
  margin: 0;
  padding: 0 0 14px;
  display: flex;
  gap: 12px;
  overflow-x: auto;
  scrollbar-width: thin;
  scroll-snap-type: x mandatory;
}

.page-about .badge {
  flex: 0 0 auto;
  width: min(272px, 76vw);
  scroll-snap-align: start;
  background: var(--star-blue);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .badge:hover,
.page-about .badge:focus-visible {
  border-color: var(--red-gold);
  transform: translateY(-3px);
  outline: none;
}

.page-about .badge-code {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--cold-cyan);
}

.page-about .badge-name {
  display: block;
  margin-top: 10px;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
}

.page-about .badge-tip {
  display: block;
  margin-top: 0;
  max-height: 0;
  overflow: hidden;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text-soft);
  opacity: 0;
  transition: max-height 0.4s var(--ease), opacity 0.3s var(--ease), margin-top 0.3s var(--ease);
}

.page-about .badge:hover .badge-tip,
.page-about .badge:focus-visible .badge-tip {
  max-height: 180px;
  opacity: 1;
  margin-top: 12px;
}

.page-about .rail-hint {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
}

/* ---------- 年度白皮书 ---------- */
.page-about .wp-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .wp-main p {
  max-width: 62ch;
  margin-top: 16px;
}

.page-about .wp-main a {
  color: var(--cold-cyan);
  border-bottom: 1px solid rgba(52, 209, 218, 0.4);
}

.page-about .wp-main a:hover {
  border-bottom-color: var(--cold-cyan);
}

.page-about .wp-aside {
  border-left: 2px solid var(--red-gold);
  padding: 4px 0 4px clamp(18px, 3vw, 28px);
}

.page-about .wp-figure {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .wp-figure .data-figure {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 8vw, 3.6rem);
  font-weight: 300;
  line-height: 1;
  color: var(--red-gold);
}

.page-about .wp-unit {
  font-family: var(--font-mono);
  font-size: 0.94rem;
  color: var(--text-soft);
}

.page-about .wp-caption {
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--text-soft);
  margin-top: 12px;
}

.page-about .wp-rule {
  height: 1px;
  margin: 20px 0 0;
  background: var(--line-hair);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .partner-card {
  background: var(--star-blue);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 30px);
  position: relative;
  overflow: hidden;
}

.page-about .partner-num {
  display: block;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  color: var(--cold-cyan);
  line-height: 1;
}

.page-about .partner-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.06rem;
  color: var(--text);
  margin: 14px 0 10px;
}

.page-about .partner-card p:last-child {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .partner-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: center;
  margin-top: clamp(24px, 4vw, 38px);
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(20, 49, 79, 0.9), rgba(6, 18, 35, 0.6));
}

.page-about .cta-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  color: var(--text);
  margin: 0 0 10px;
  line-height: 1.45;
}

.page-about .partner-cta p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 60ch;
}

.page-about .partner-cta .btn {
  justify-self: start;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .stat-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .partner-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .partner-cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .partner-cta .btn {
    justify-self: end;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 80px);
  }

  .page-about .timeline-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .timeline-rail {
    position: sticky;
    top: 120px;
    align-self: start;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
  }

  .page-about .rail-list a {
    width: 100%;
    border: 0;
    border-radius: var(--radius-sm);
    padding: 9px 10px;
    justify-content: flex-start;
  }

  .page-about .rail-list a:hover,
  .page-about .rail-list a:focus-visible {
    background: rgba(200, 162, 74, 0.08);
  }

  .page-about .network-layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
  }

  .page-about .team-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .credential-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .badge-rail {
    flex-wrap: wrap;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .badge {
    width: calc(50% - 6px);
  }

  .page-about .wp-layout {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}