.page-about {
  display: block;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.25rem 0 0.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--index-sage);
}

.page-about .about-crumb a {
  color: var(--electric-blue);
  text-decoration: none;
}

.page-about .about-crumb a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(2.25rem, 5vw, 4rem);
  border-bottom: 1px solid var(--divider-line);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-about .about-hero__bg img {
  position: relative;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 0;
  background:
    radial-gradient(115% 85% at 10% 0%, rgba(11, 61, 46, 0.4) 0%, rgba(6, 36, 27, 0.93) 58%, var(--deep-turf) 100%),
    linear-gradient(180deg, transparent 55%, rgba(6, 36, 27, 0.85) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__title {
  margin: 0.75rem 0 0;
  max-width: 22ch;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(2.35rem, 7.4vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--ink-white);
}

.page-about .about-hero__lead {
  margin: clamp(1rem, 2.4vw, 1.75rem) 0 0;
  max-width: 62ch;
  font-size: clamp(0.98rem, 1.6vw, 1.125rem);
  line-height: 1.85;
  color: rgba(242, 247, 244, 0.82);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: clamp(1.75rem, 4vw, 3rem) 0 0;
  padding: 0;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
  padding: 0.9rem 1rem 1rem;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-sm);
  background: var(--glass-layer);
  backdrop-filter: blur(6px);
}

.page-about .about-hero__stat--lead {
  grid-column: 1 / -1;
  border-color: rgba(255, 107, 53, 0.45);
  background: linear-gradient(140deg, rgba(255, 107, 53, 0.16) 0%, rgba(255, 107, 53, 0.03) 60%, transparent 100%);
}

.page-about .about-hero__statlabel {
  order: 2;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--index-sage);
}

.page-about .about-hero__bignum,
.page-about .about-hero__num {
  order: 1;
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--neon-orange);
  line-height: 0.9;
}

.page-about .about-hero__bignum {
  font-size: clamp(4.5rem, 18vw, 9rem);
  letter-spacing: -0.04em;
}

.page-about .about-hero__num {
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  color: var(--electric-blue);
}

.page-about .about-hero__statnote {
  order: 3;
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.6;
  color: rgba(143, 167, 156, 0.9);
}

/* ---------- 章节外壳 ---------- */
.page-about .about-section {
  padding: clamp(1.5rem, 3.6vw, 2.75rem) 0 0;
}

.page-about .about-section--last {
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-panel {
  padding: clamp(1.25rem, 3vw, 2.25rem);
  border-radius: var(--radius);
}

.page-about .about-panel--glass {
  border: 1px solid var(--glass-line);
  background: var(--glass-layer);
  backdrop-filter: blur(10px);
}

.page-about .about-h2 {
  margin: clamp(1rem, 2.2vw, 1.5rem) 0 0;
  max-width: 26ch;
  font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  font-weight: 500;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink-white);
}

.page-about .about-lead {
  margin: 0.9rem 0 0;
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.5vw, 1.0625rem);
  line-height: 1.85;
  color: rgba(242, 247, 244, 0.8);
}

/* ---------- 01 起点：7/5 切分 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  margin-top: clamp(1rem, 2.4vw, 1.75rem);
}

.page-about .about-split__main p {
  margin: 0 0 1rem;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(242, 247, 244, 0.82);
}

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

.page-about .about-split__side {
  align-self: start;
  padding: 1.1rem 1.15rem 1.25rem;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-sm);
  background: rgba(6, 36, 27, 0.4);
}

.page-about .about-aside__title {
  margin: 0 0 0.85rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--index-sage);
}

.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-line {
  display: grid;
  gap: 0.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--divider-line);
}

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

.page-about .about-line__k {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  color: var(--neon-orange);
}

.page-about .about-line__v {
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(242, 247, 244, 0.78);
}

.page-about .about-aside__link {
  margin-top: 1.1rem;
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ---------- 02 服务版图 ---------- */
.page-about .about-media {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

.page-about .about-map {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: clamp(1.1rem, 2.6vw, 1.75rem);
}

.page-about .about-map__zone {
  padding: 1.1rem 1.15rem 1.25rem;
  border: 1px solid var(--divider-line);
  border-radius: var(--radius-sm);
  background: rgba(18, 82, 61, 0.42);
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .about-map__zone--core {
  border-color: rgba(255, 107, 53, 0.4);
  background: linear-gradient(150deg, rgba(255, 107, 53, 0.14) 0%, rgba(18, 82, 61, 0.5) 55%);
}

.page-about .about-map__zone:hover,
.page-about .about-map__zone:focus-within {
  transform: translateY(-2px);
  border-color: var(--electric-blue);
}

.page-about .about-map__name {
  margin: 0.7rem 0 0;
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink-white);
}

.page-about .about-map__desc {
  margin: 0.5rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(242, 247, 244, 0.78);
}

.page-about .about-map__facts {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-about .about-map__facts li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: baseline;
  font-size: 0.8125rem;
}

.page-about .about-map__fk {
  flex: 0 0 auto;
  letter-spacing: 0.12em;
  color: var(--index-sage);
}

.page-about .about-map__fv {
  color: rgba(242, 247, 244, 0.88);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: clamp(1.1rem, 2.6vw, 1.75rem);
}

.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.9rem 1rem 1rem;
  border: 1px solid var(--divider-line);
  border-left: 2px solid var(--electric-blue);
  border-radius: var(--radius-sm);
  background: rgba(6, 36, 27, 0.5);
}

.page-about .about-metric__n {
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 4vw, 2rem);
  line-height: 1;
  color: var(--ink-white);
}

.page-about .about-metric__l {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--index-sage);
}

/* ---------- 03 数据流水线 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  margin-top: clamp(1.1rem, 2.6vw, 1.75rem);
}

.page-about .about-flow__step {
  position: relative;
  border: 1px solid var(--divider-line);
  border-radius: var(--radius-sm);
  background: rgba(6, 36, 27, 0.45);
  overflow: hidden;
}

.page-about .about-flow__step[open] {
  border-color: rgba(0, 194, 255, 0.45);
  background: rgba(18, 82, 61, 0.45);
}

.page-about .about-flow__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  color: var(--ink-white);
}

.page-about .about-flow__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-flow__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--electric-blue);
}

.page-about .about-flow__step[open] .about-flow__sum::after {
  content: "–";
}

.page-about .about-flow__idx {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--neon-orange);
}

.page-about .about-flow__name {
  font-weight: 500;
  letter-spacing: 0.04em;
}

.page-about .about-flow__body {
  padding: 0 1rem 1rem;
}

.page-about .about-flow__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(242, 247, 244, 0.8);
}

/* ---------- 04 团队 ---------- */
.page-about .about-teams {
  list-style: none;
  margin: clamp(1.1rem, 2.6vw, 1.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-team {
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--divider-line);
}

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

.page-about .about-team__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.page-about .about-team__name {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--ink-white);
}

.page-about .about-team__n {
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: 1.125rem;
  color: var(--neon-orange);
}

.page-about .about-team__track {
  position: relative;
  height: 8px;
  margin: 0.7rem 0 0.75rem;
  border-radius: 99px;
  background: rgba(30, 74, 58, 0.9);
  overflow: hidden;
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
  border-radius: 99px;
}

.page-about .about-team__fill--a {
  width: 42%;
  background: linear-gradient(90deg, var(--neon-orange) 0%, #ff9a6b 100%);
}

.page-about .about-team__fill--b {
  width: 37%;
  background: linear-gradient(90deg, var(--electric-blue) 0%, #6fdcff 100%);
}

.page-about .about-team__fill--c {
  width: 21%;
  background: linear-gradient(90deg, var(--rise-teal) 0%, #85ecd0 100%);
}

.page-about .about-team__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(242, 247, 244, 0.78);
}

/* ---------- 05 赛季轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  display: flex;
  gap: 0.85rem;
  margin: clamp(1.1rem, 2.6vw, 1.75rem) 0 0;
  padding: 0.25rem 0.25rem 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: var(--divider-line) transparent;
}

.page-about .about-node {
  position: relative;
  flex: 0 0 min(80vw, 268px);
  scroll-snap-align: start;
  padding: 1.4rem 1rem 1.1rem;
  border: 1px solid var(--divider-line);
  border-radius: var(--radius-sm);
  background: rgba(6, 36, 27, 0.5);
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease), background 0.28s var(--ease);
}

.page-about .about-node__axis {
  position: absolute;
  top: 0.85rem;
  left: 1rem;
  right: 1rem;
  height: 1px;
  background: linear-gradient(90deg, var(--electric-blue) 0%, rgba(0, 194, 255, 0.08) 100%);
}

.page-about .about-node__axis::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--electric-blue);
  box-shadow: 0 0 10px rgba(0, 194, 255, 0.75);
}

.page-about .about-node__season {
  display: block;
  margin-top: 0.9rem;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--neon-orange);
}

.page-about .about-node__title {
  margin: 0.55rem 0 0;
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink-white);
}

.page-about .about-node__desc {
  margin: 0.55rem 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(242, 247, 244, 0.78);
}

.page-about .about-node__more {
  margin: 0.55rem 0 0;
  padding-top: 0.55rem;
  border-top: 1px dashed var(--divider-line);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--index-sage);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  transform: translateY(-3px);
  border-color: rgba(0, 194, 255, 0.5);
  background: rgba(18, 82, 61, 0.55);
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .about-node__more {
    max-height: 0;
    padding-top: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    border-top-color: transparent;
    transition: max-height 0.34s var(--ease), opacity 0.28s var(--ease), margin-top 0.28s var(--ease), padding-top 0.28s var(--ease);
  }

  .page-about .about-node:hover .about-node__more,
  .page-about .about-node:focus-within .about-node__more {
    max-height: 10rem;
    margin-top: 0.55rem;
    padding-top: 0.55rem;
    opacity: 1;
    border-top-color: var(--divider-line);
  }
}

/* ---------- 06 协作生态 ---------- */
.page-about .about-split--reverse {
  margin-top: clamp(1rem, 2.4vw, 1.75rem);
}

.page-about .about-split__side--list {
  display: grid;
  gap: 0.75rem;
  background: transparent;
  border: 0;
  padding: 0;
}

.page-about .about-eco {
  padding: 0.9rem 1rem 1rem;
  border: 1px solid var(--glass-line);
  border-left: 2px solid var(--neon-orange);
  border-radius: var(--radius-sm);
  background: rgba(6, 36, 27, 0.5);
}

.page-about .about-eco__n {
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  line-height: 1;
  color: var(--electric-blue);
}

.page-about .about-eco__t {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-white);
}

.page-about .about-eco__d {
  margin: 0.4rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--index-sage);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  padding: clamp(1.35rem, 3.4vw, 2.5rem);
  border: 1px solid rgba(255, 107, 53, 0.35);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 120% at 0% 0%, rgba(255, 107, 53, 0.16) 0%, transparent 58%),
    linear-gradient(160deg, rgba(18, 82, 61, 0.6) 0%, rgba(6, 36, 27, 0.9) 100%);
}

.page-about .about-next__copy .about-h2 {
  margin-top: 0.6rem;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-self: center;
}

.page-about .about-next__actions .sy-btn {
  flex: 1 1 auto;
  min-width: 9rem;
  justify-content: center;
  text-align: center;
}

/* ---------- 桌面端排版 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }

  .page-about .about-hero__stat--lead {
    grid-column: span 3;
  }

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

  .page-about .about-map {
    grid-template-columns: 5fr 7fr;
    gap: 1rem;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__stats {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }

  .page-about .about-hero__stat--lead {
    grid-column: span 1;
  }

  .page-about .about-split {
    grid-template-columns: 7fr 5fr;
    gap: 2.5rem;
  }

  .page-about .about-split--reverse {
    grid-template-columns: 7fr 5fr;
    gap: 2.25rem;
  }

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

  .page-about .about-teams {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .about-team {
    padding-bottom: 0;
    border-bottom: 0;
    padding-left: 1rem;
    border-left: 1px solid var(--divider-line);
  }

  .page-about .about-team:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .about-timeline {
    padding-bottom: 1.25rem;
  }

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

  .page-about .about-next {
    grid-template-columns: 8fr 4fr;
    align-items: center;
    gap: 2rem;
  }

  .page-about .about-next__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .about-next__actions .sy-btn {
    flex: 0 0 auto;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-map__zone,
  .page-about .about-node,
  .page-about .about-team__fill {
    transition: none;
  }

  .page-about .about-node:hover,
  .page-about .about-node:focus-within,
  .page-about .about-map__zone:hover,
  .page-about .about-map__zone:focus-within {
    transform: none;
  }
}