.page-about {
  --about-glow: radial-gradient(circle at 50% 50%, rgba(255, 90, 31, 0.20), rgba(255, 90, 31, 0) 70%);
  --about-cyan-glow: radial-gradient(circle at 50% 50%, rgba(55, 194, 214, 0.18), rgba(55, 194, 214, 0) 70%);
  --about-grid-line: rgba(140, 152, 168, 0.10);
  padding-bottom: 8px;
}

.page-about .breadcrumb {
  margin: 22px 0 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 46px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -170px;
  right: -190px;
  width: 460px;
  height: 460px;
  background: var(--about-glow);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: -220px;
  left: -160px;
  width: 380px;
  height: 380px;
  background: var(--about-cyan-glow);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  row-gap: 34px;
  align-items: start;
}

.page-about .about-hero__copy h1 {
  margin: 12px 0 18px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 8.4vw, 60px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-hero__copy .lede {
  max-width: 34em;
  color: #C6CFDA;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 数据面板 ---------- */
.page-about .about-panel {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(30, 39, 51, 0.92), rgba(11, 14, 19, 0.96) 72%);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about .about-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
  pointer-events: none;
}

.page-about .about-panel::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: var(--about-cyan-glow);
  pointer-events: none;
}

.page-about .about-panel__head,
.page-about .about-panel__metrics,
.page-about .about-panel__list {
  position: relative;
  z-index: 1;
}

.page-about .about-panel__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-panel__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--flame);
  box-shadow: 0 0 0 5px rgba(255, 90, 31, 0.16);
}

.page-about .about-panel__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-panel__metrics {
  display: grid;
  gap: 20px;
  padding: 20px 0 4px;
}

.page-about .about-metric .tally {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about .about-metric .tally--xl {
  font-size: clamp(40px, 11vw, 62px);
}

.page-about .about-metric .tally--flame {
  color: var(--flame);
}

.page-about .about-metric .tally--cyan {
  color: var(--cyan);
}

.page-about .about-metric__cap {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-panel__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 11px;
}

.page-about .about-panel__list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-panel__list b {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--ember-soft);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  position: relative;
  padding: 46px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-section .section-title {
  margin: 10px 0 0;
}

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

.page-about .about-section .section-lede {
  margin-top: 14px;
}

.page-about .about-story__body {
  margin-top: 22px;
}

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

/* ---------- 数据流程 ---------- */
.page-about .about-flow__grid {
  row-gap: 34px;
  align-items: start;
}

.page-about .about-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-step {
  position: relative;
  padding: 18px 20px;
  border-left: 2px solid var(--flame);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.10), rgba(20, 26, 34, 0.58) 62%);
  transition: background var(--dur), border-color var(--dur);
}

.page-about .about-step:nth-child(2) {
  border-left-color: var(--ember);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.09), rgba(20, 26, 34, 0.58) 62%);
}

.page-about .about-step:nth-child(3) {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(55, 194, 214, 0.10), rgba(20, 26, 34, 0.58) 62%);
}

.page-about .about-step:hover {
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.18), rgba(30, 39, 51, 0.7) 62%);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ember-soft);
}

.page-about .about-step h3 {
  margin: 8px 0 6px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #B9C3CF;
}

.page-about .about-flow__media {
  margin-top: 8px;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-about .about-figure__cap {
  margin: 12px 2px 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 六类统计项 ---------- */
.page-about .about-stat-grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .about-stat-card {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(30, 39, 51, 0.7), rgba(20, 26, 34, 0.95));
  transition: transform var(--dur), border-color var(--dur), box-shadow var(--dur);
}

.page-about .about-stat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 90, 31, 0.42);
  box-shadow: var(--shadow-card);
}

.page-about .about-stat-card__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-stat-card__name {
  margin: 14px 0 6px;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-stat-card__q {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--cyan-soft);
}

.page-about .about-stat-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #AFBAC7;
}

/* ---------- 内容板块 ---------- */
.page-about .about-blocks__grid {
  row-gap: 32px;
}

.page-about .about-blocks__body .prose {
  margin-top: 16px;
}

.page-about .about-tags {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px 9px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(20, 26, 34, 0.85);
  font-size: 14px;
  color: var(--white);
  transition: border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast);
}

.page-about .about-tag:hover {
  transform: translateY(-2px);
  background: rgba(30, 39, 51, 0.95);
}

.page-about .about-tag--flame:hover {
  border-color: rgba(255, 90, 31, 0.5);
}

.page-about .about-tag--cyan:hover {
  border-color: rgba(55, 194, 214, 0.5);
}

.page-about .about-tag__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  padding-right: 8px;
  border-right: 1px solid var(--line);
}

.page-about .about-tag--flame .about-tag__no {
  color: var(--ember-soft);
}

.page-about .about-tag--cyan .about-tag__no {
  color: var(--cyan-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team__filter {
  margin-top: 24px;
}

.page-about .about-team-grid {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.page-about .about-team-card {
  padding: 22px 20px;
}

.page-about .about-team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.page-about .about-team-card__role {
  margin: 12px 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan-soft);
}

.page-about .about-team-card .card__title {
  margin: 0 0 10px;
}

/* ---------- 合作 ---------- */
.page-about .about-figure--wide img {
  aspect-ratio: 16 / 7;
}

.page-about .about-partners__head {
  margin-top: 34px;
}

.page-about .about-strip {
  display: flex;
  gap: 16px;
  margin-top: 26px;
  padding: 4px 0 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-strip:focus-visible {
  outline: 2px solid var(--flame);
  outline-offset: 4px;
  border-radius: var(--r-md);
}

.page-about .about-strip__item {
  flex: 0 0 min(292px, 80vw);
  scroll-snap-align: start;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(30, 39, 51, 0.72), rgba(20, 26, 34, 0.95));
  transition: border-color var(--dur), transform var(--dur);
}

.page-about .about-strip__item:hover {
  transform: translateY(-3px);
  border-color: rgba(55, 194, 214, 0.42);
}

.page-about .about-strip__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-strip__title {
  margin: 14px 0 8px;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-strip__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #AFBAC7;
}

/* ---------- 时间轴 ---------- */
.page-about .about-track {
  position: relative;
  list-style: none;
  margin: 30px 0 0;
  padding: 8px 0;
  display: grid;
  gap: 14px;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: -4%;
  right: -4%;
  top: 0;
  bottom: 0;
  z-index: 0;
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(255, 90, 31, 0.07), rgba(55, 194, 214, 0.06));
  transform: skewY(-1.6deg);
  pointer-events: none;
}

.page-about .about-track__item {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(120deg, rgba(30, 39, 51, 0.82), rgba(11, 14, 19, 0.9));
  transition: border-color var(--dur), transform var(--dur), box-shadow var(--dur);
}

.page-about .about-track__item:hover,
.page-about .about-track__item:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(255, 90, 31, 0.45);
  box-shadow: var(--shadow-card);
  outline: none;
}

.page-about .about-track__item:focus-visible {
  box-shadow: 0 0 0 2px var(--flame), inset 0 0 0 2px rgba(55, 194, 214, 0.45), var(--shadow-card);
}

.page-about .about-track__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--flame);
}

.page-about .about-track__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-track__line {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #B9C3CF;
}

.page-about .about-track__more {
  display: grid;
  grid-template-rows: 1fr;
  opacity: 1;
  transition: grid-template-rows var(--dur), opacity var(--dur);
}

.page-about .about-track__more > p {
  margin: 10px 0 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  border-left: 2px solid rgba(55, 194, 214, 0.45);
  padding-left: 12px;
}

.page-about .about-arc {
  margin: 24px 0 0;
}

.page-about .about-arc svg {
  display: block;
  width: 100%;
  height: 96px;
}

/* ---------- 收束 CTA ---------- */
.page-about .about-section--cta {
  border-top: none;
  padding-top: 10px;
}

.page-about .about-cta {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 30px 22px;
  border: 1px solid rgba(255, 90, 31, 0.32);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(255, 90, 31, 0.17), rgba(55, 194, 214, 0.10) 62%, rgba(11, 14, 19, 0.2) 100%);
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -50px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: var(--about-glow);
  pointer-events: none;
}

.page-about .about-cta__text {
  position: relative;
  z-index: 1;
  max-width: 40em;
}

.page-about .about-cta__text h2 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(22px, 5.4vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--white);
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #C2CBD6;
}

.page-about .about-cta__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-track__item {
    flex-direction: row;
    align-items: flex-start;
    gap: 22px;
  }

  .page-about .about-track__year {
    flex: 0 0 84px;
    padding-top: 2px;
  }

  .page-about .about-arc svg {
    height: 120px;
  }

  .page-about .about-cta {
    padding: 38px 34px;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 40px 0 66px;
  }

  .page-about .about-section {
    padding: 62px 0;
  }

  .page-about .about-story__body {
    margin-top: 0;
  }

  .page-about .about-flow__media {
    margin-top: 46px;
  }

  .page-about .about-strip__item {
    flex: 0 0 300px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 54px 0 84px;
  }

  .page-about .about-section {
    padding: 76px 0;
  }

  .page-about .about-stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-flow__grid {
    align-items: start;
  }

  .page-about .about-blocks__media {
    margin-top: 6px;
  }
}

@media (hover: hover) and (min-width: 768px) {
  .page-about .about-track__more {
    grid-template-rows: 0fr;
    opacity: 0;
  }

  .page-about .about-track__item:hover .about-track__more,
  .page-about .about-track__item:focus-visible .about-track__more,
  .page-about .about-track__item:focus-within .about-track__more {
    grid-template-rows: 1fr;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat-card,
  .page-about .about-strip__item,
  .page-about .about-track__item,
  .page-about .about-step,
  .page-about .about-tag,
  .page-about .about-track__more {
    transition: none;
  }

  .page-about .about-stat-card:hover,
  .page-about .about-strip__item:hover,
  .page-about .about-track__item:hover,
  .page-about .about-tag:hover {
    transform: none;
  }
}