.page-about {
  --about-gap: clamp(20px, 3vw, 36px);
  --about-sect-gap: clamp(40px, 6vw, 76px);
  display: block;
  background: var(--deep-indigo);
  color: var(--mist-white);
  font-family: var(--sans);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding-top: clamp(18px, 4vw, 36px);
  padding-bottom: clamp(10px, 2vw, 18px);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding-top: clamp(6px, 2vw, 14px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-hero__title {
  margin: 12px 0 20px;
  font-size: clamp(2.1rem, 6vw, 5rem);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: 0.02em;
  color: var(--mist-white);
  max-width: 18ch;
}

.page-about .about-hero__lede {
  max-width: 64ch;
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--mist-white);
}

.page-about .about-hero__lede::before {
  content: "";
  display: block;
  width: 56px;
  height: 2px;
  margin-bottom: 18px;
  background: linear-gradient(90deg, var(--electric-cyan), var(--fluoro-orange));
}

.page-about .about-hero__metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .hero-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--pad-1);
  background: var(--panel-indigo);
}

.page-about .hero-metric__num {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1;
  color: var(--electric-cyan);
}

.page-about .hero-metric__label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--cold-gray);
}

.page-about .about-hero__figure {
  margin: var(--about-gap) 0 0;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.72;
}

.page-about .about-hero__figure .figure__cap {
  background: var(--charcoal);
  color: var(--cold-gray);
  border-top: 1px solid var(--grid-line);
}

/* 节点刻度条 */
.page-about .about-rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-top: var(--about-gap);
  padding-top: 18px;
  border-top: 1px solid var(--grid-line);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-rail__list a {
  display: inline-block;
  padding: 6px 12px;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cold-gray);
  text-decoration: none;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--electric-cyan);
  border-color: var(--electric-cyan);
}

/* ============ 页内导航 ============ */
.page-about .about-index {
  margin-top: clamp(32px, 5vw, 64px);
  padding: 18px 0;
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
  display: grid;
  gap: 10px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.page-about .about-index__list a {
  color: var(--cold-gray);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible,
.page-about .about-index__list a[aria-current="true"] {
  color: var(--electric-cyan);
  border-bottom-color: var(--electric-cyan);
}

/* ============ 通用面板 ============ */
.page-about .about-sect {
  margin-top: var(--about-sect-gap);
}

.page-about .about-sect__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-sect__title {
  margin: 0;
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--mist-white);
}

.page-about .about-lede {
  margin: 0 0 clamp(18px, 3vw, 28px);
  color: var(--mist-white);
}

.page-about .about-sect .prose {
  max-width: 68ch;
  color: var(--mist-white);
  line-height: 1.8;
}

.page-about .about-sect .prose + .prose {
  margin-top: 18px;
}

/* ============ 观赛主张 ============ */
.page-about .about-belief {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-belief__item {
  padding: clamp(20px, 3vw, 30px);
  background: var(--deep-indigo);
  border-left: 2px solid transparent;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-about .about-belief__item:hover {
  border-left-color: var(--fluoro-orange);
  background: var(--panel-indigo);
}

.page-about .about-belief__num {
  display: block;
  margin-bottom: 10px;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1;
  color: var(--electric-cyan);
}

.page-about .about-belief__title {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mist-white);
}

.page-about .about-belief__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--cold-gray);
}

/* ============ 团队 ============ */
.page-about .about-teams {
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team {
  padding: clamp(22px, 3.4vw, 38px);
  background: var(--deep-indigo);
  transition: background var(--t) var(--ease);
}

.page-about .about-team:hover,
.page-about .about-team:focus-within {
  background: var(--panel-indigo);
}

.page-about .about-team__num {
  display: block;
  margin-bottom: 6px;
  font-size: clamp(2.2rem, 5.6vw, 3.4rem);
  line-height: 1;
  color: var(--electric-cyan);
}

.page-about .about-team__title {
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--grid-line);
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mist-white);
}

.page-about .about-team p {
  margin: 0 0 12px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cold-gray);
}

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

.page-about .about-team__figure {
  margin: var(--about-gap) 0 0;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.78;
}

.page-about .about-team__figure .figure__cap {
  background: var(--charcoal);
  color: var(--cold-gray);
  border-top: 1px solid var(--grid-line);
}

/* 流程 */
.page-about .about-flow {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-flow li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 13px 0;
  border-top: 1px solid var(--grid-line);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--cold-gray);
}

.page-about .about-flow li:last-child {
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-flow .mono {
  color: var(--electric-cyan);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

/* ============ 三张复盘图 ============ */
.page-about .about-metrics {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 3vw, 28px);
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-metric {
  padding: clamp(20px, 3vw, 32px);
  background: var(--deep-indigo);
  border-top: 2px solid transparent;
  transition: border-color var(--t) var(--ease);
}

.page-about .about-metric:hover {
  border-top-color: var(--electric-cyan);
}

.page-about .about-metric h3 {
  margin: 10px 0 12px;
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--electric-cyan);
}

.page-about .about-metric p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cold-gray);
}

/* ============ 发展节点 ============ */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--grid-line);
}

.page-about .tl {
  position: relative;
  padding-left: 30px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--electric-cyan);
  border-radius: 1px;
  background: var(--deep-indigo);
}

.page-about .tl--now::before {
  background: var(--fluoro-orange);
  border-color: var(--fluoro-orange);
}

.page-about .tl__year {
  display: block;
  margin: 0 0 8px;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--electric-cyan);
}

.page-about .tl--now .tl__year {
  color: var(--fluoro-orange);
}

.page-about .tl__body h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--mist-white);
}

.page-about .tl__body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cold-gray);
  max-width: 62ch;
}

.page-about .about-timeline__figure {
  margin: var(--about-gap) 0 0;
  max-width: 720px;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-about .about-timeline__figure .figure__cap {
  background: var(--charcoal);
  color: var(--cold-gray);
  border-top: 1px solid var(--grid-line);
}

/* ============ 区域与合作 ============ */
.page-about .about-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-dots {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  background: var(--deep-indigo);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
}

.page-about .about-region__cap {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cold-gray);
}

.page-about .about-region__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .region-stat {
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--deep-indigo);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .region-stat__num {
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
  line-height: 1;
  color: var(--electric-cyan);
}

.page-about .region-stat__num--warm {
  color: var(--fluoro-orange);
}

.page-about .region-stat__label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--cold-gray);
}

.page-about .about-partners {
  list-style: none;
  margin: var(--about-gap) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  border-top: 1px solid var(--grid-line);
  padding-top: clamp(18px, 3vw, 26px);
}

.page-about .about-partners li {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--cold-gray);
  padding-left: 16px;
  border-left: 2px solid var(--electric-cyan);
}

.page-about .about-partners li:last-child {
  border-left-color: var(--fluoro-orange);
}

.page-about .about-partners .mono {
  color: var(--mist-white);
  font-size: 1.0625rem;
  margin-right: 4px;
}

/* ============ 行业参与 ============ */
.page-about .about-honors {
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .honor {
  padding: clamp(20px, 3vw, 30px);
  background: var(--deep-indigo);
}

.page-about .honor__num {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(1.9rem, 4.6vw, 2.8rem);
  line-height: 1;
  color: var(--electric-cyan);
}

.page-about .honor__title {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--mist-white);
}

.page-about .honor p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cold-gray);
}

/* ============ 结尾引导 ============ */
.page-about .about-cta {
  margin-top: var(--about-sect-gap);
  text-align: left;
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--mist-white);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cold-gray);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-cta__actions .linkbtn {
  color: var(--electric-cyan);
}

/* ============ 断点 ============ */
@media (min-width: 768px) {
  .page-about .about-hero__metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-belief {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(28px, 4vw, 56px);
  }

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

  .page-about .about-region {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }

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

  .page-about .about-timeline {
    gap: clamp(30px, 4vw, 48px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__title {
    max-width: 15ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 1ms !important;
  }
}