.page-about {
  --ov-indigo-lift: #2C2268;
  --ov-panel-teal: rgba(12, 74, 72, 0.55);
  background: var(--yb-deep);
  color: var(--yb-silver);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-about .ov-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--yb-line);
  background:
    radial-gradient(120% 92% at 80% 10%, rgba(36, 26, 94, 0.88) 0%, rgba(10, 27, 61, 0) 62%),
    linear-gradient(180deg, #0A1B3D 0%, #071229 100%);
}

.page-about .ov-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(198, 210, 227, 0.065) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 210, 227, 0.065) 1px, transparent 1px);
  background-size: 72px 72px;
}

.page-about .ov-hero::after {
  content: "";
  position: absolute;
  top: -140px;
  right: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 26, 0.28) 0%, rgba(255, 106, 26, 0) 68%);
  pointer-events: none;
}

.page-about .ov-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
  padding-top: 36px;
  padding-bottom: 44px;
}

.page-about .ov-hero__copy {
  min-width: 0;
}

.page-about .ov-hero .yb-crumbs {
  margin-bottom: 22px;
}

.page-about .ov-hero .yb-crumbs__link,
.page-about .ov-hero .yb-crumbs__current {
  color: var(--yb-silver);
}

.page-about .ov-hero .yb-crumbs__link:hover {
  color: var(--yb-lime);
}

.page-about .ov-hero__title {
  margin: 14px 0 0;
  font-family: var(--yb-sans);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--yb-paper);
}

.page-about .ov-hero__title em {
  font-style: normal;
  color: var(--yb-orange);
}

.page-about .ov-hero__lead {
  max-width: 620px;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(198, 210, 227, 0.92);
}

.page-about .ov-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* 右侧控制台面板 */
.page-about .ov-panel {
  border: 1px solid var(--yb-line-strong);
  background: linear-gradient(160deg, var(--ov-panel-teal) 0%, rgba(10, 27, 61, 0.92) 100%);
  padding: 16px 16px 14px;
  min-width: 0;
}

.page-about .ov-panel__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 13px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--yb-line);
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--yb-silver);
}

.page-about .ov-panel__dot {
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--yb-lime);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(184, 255, 69, 0.16);
  animation: ovPulse 2.2s ease-in-out infinite;
}

.page-about .ov-panel__live {
  margin-left: auto;
  color: var(--yb-orange);
  font-weight: 700;
}

.page-about .ov-panel__rows {
  display: grid;
}

.page-about .ov-panel__row {
  display: grid;
  grid-template-columns: 56px 1fr 34px;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(198, 210, 227, 0.16);
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(198, 210, 227, 0.86);
}

.page-about .ov-panel__row:last-child {
  border-bottom: 0;
}

.page-about .ov-panel__code {
  color: var(--yb-silver);
}

.page-about .ov-panel__pct {
  text-align: right;
  color: var(--yb-lime);
  font-variant-numeric: tabular-nums;
}

.page-about .ov-panel__track {
  position: relative;
  display: block;
  height: 6px;
  background: rgba(198, 210, 227, 0.15);
}

.page-about .ov-panel__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  display: block;
  background: var(--yb-grad);
}

.page-about .ov-w92 { width: 92%; }
.page-about .ov-w84 { width: 84%; }
.page-about .ov-w76 { width: 76%; }
.page-about .ov-w68 { width: 68%; }
.page-about .ov-w61 { width: 61%; }
.page-about .ov-w54 { width: 54%; }

.page-about .ov-panel__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--yb-line);
  font-size: 12px;
  color: rgba(198, 210, 227, 0.8);
}

.page-about .ov-panel__foot .yb-mono {
  color: var(--yb-amber);
  letter-spacing: 0.08em;
}

@keyframes ovPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.82); }
}

/* 首屏底部数据条 */
.page-about .ov-strip {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--yb-line);
  background: rgba(7, 18, 41, 0.82);
}

.page-about .ov-strip__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 34px;
  list-style: none;
  margin: 0;
  padding: 15px 0;
}

.page-about .ov-strip__list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .ov-strip__num {
  font-family: var(--yb-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--yb-orange);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-about .ov-strip__txt {
  font-size: 13px;
  color: rgba(198, 210, 227, 0.85);
}

/* ============ 通用章节 ============ */
.page-about .ov-section {
  position: relative;
  padding: 56px 0;
  border-bottom: 1px solid var(--yb-line);
}

.page-about .ov-section--indigo { background: var(--yb-indigo); }
.page-about .ov-section--road { background: linear-gradient(180deg, #071229 0%, #0A1B3D 100%); }
.page-about .ov-section--paper { background: var(--yb-paper); color: var(--yb-ink); border-bottom-color: rgba(10, 12, 18, 0.14); }
.page-about .ov-section--teal { background: var(--yb-teal); }
.page-about .ov-section--wine { background: var(--yb-wine); }
.page-about .ov-section--promise { background: linear-gradient(122deg, #241A5E 0%, #0A1B3D 64%); }

.page-about .ov-head {
  max-width: 780px;
}

.page-about .ov-head .yb-h2,
.page-about .ov-road__aside .yb-h2,
.page-about .ov-promise__copy .yb-h2 {
  margin: 12px 0 0;
  letter-spacing: -0.02em;
}

.page-about .ov-head__lead {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(198, 210, 227, 0.88);
}

.page-about .ov-section--paper .ov-head__lead {
  color: rgba(10, 12, 18, 0.72);
}

.page-about .ov-section--paper .yb-overline {
  color: var(--yb-orange-deep);
}

.page-about .ov-section--paper .yb-h2 {
  color: var(--yb-ink);
}

/* ============ 02 服务范围 ============ */
.page-about .ov-scope__grid {
  display: grid;
  gap: 1px;
  margin-top: 36px;
  border: 1px solid var(--yb-line);
  background: var(--yb-line);
}

.page-about .ov-scope__item {
  background: var(--yb-indigo);
  padding: 24px 20px 26px;
  transition: background-color 0.2s ease;
}

.page-about .ov-scope__item:hover {
  background: var(--ov-indigo-lift);
}

.page-about .ov-scope__no {
  display: inline-block;
  margin-bottom: 16px;
  padding: 2px 8px;
  border: 1px solid rgba(184, 255, 69, 0.42);
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--yb-lime);
}

.page-about .ov-scope__name {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--yb-paper);
}

.page-about .ov-scope__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(198, 210, 227, 0.85);
}

.page-about .ov-scope__meta {
  display: block;
  margin-top: 16px;
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yb-orange);
}

/* ============ 03 发展历程 ============ */
.page-about .ov-road__inner {
  display: grid;
  gap: 40px;
}

.page-about .ov-road__lede {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(198, 210, 227, 0.86);
}

.page-about .ov-road__figure {
  margin: 26px 0 0;
  border: 1px solid var(--yb-line);
  overflow: hidden;
}

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

.page-about .ov-track__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--yb-line-strong);
}

.page-about .ov-track__tab {
  appearance: none;
  -webkit-appearance: none;
  padding: 9px 13px;
  border: 1px solid var(--yb-line-strong);
  background: transparent;
  color: var(--yb-silver);
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .ov-track__tab:hover {
  border-color: var(--yb-orange);
  color: var(--yb-paper);
}

.page-about .ov-track__tab[aria-selected="true"] {
  background: var(--yb-lime);
  border-color: var(--yb-lime);
  color: var(--yb-ink);
  font-weight: 700;
}

.page-about .ov-track__tab[aria-selected="true"]:hover {
  color: var(--yb-ink);
  border-color: var(--yb-lime);
}

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

.page-about .ov-track__panel {
  position: relative;
  padding: 4px 0 24px 24px;
  border-left: 1px solid var(--yb-line-strong);
}

.page-about .ov-track__panel:last-child {
  padding-bottom: 4px;
}

.page-about .ov-track__panel::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--yb-lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 69, 0.15);
}

.page-about .ov-track__panel:focus-visible {
  outline: 1px solid var(--yb-orange);
  outline-offset: 4px;
}

.page-about .ov-track__year {
  display: block;
  margin: 0;
  font-family: var(--yb-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--yb-orange);
}

.page-about .ov-track__title {
  margin: 8px 0 8px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--yb-paper);
}

.page-about .ov-track__body {
  max-width: 640px;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(198, 210, 227, 0.88);
}

/* ============ 04 团队与生产 ============ */
.page-about .ov-team__photo {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 34px 0 0;
  border: 1px solid rgba(10, 12, 18, 0.14);
  object-fit: cover;
}

.page-about .ov-roles {
  margin-top: 34px;
  border-top: 1px solid rgba(10, 12, 18, 0.16);
}

.page-about .ov-role {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(10, 12, 18, 0.16);
  transition: background-color 0.18s ease;
}

.page-about .ov-role:hover {
  background: rgba(255, 106, 26, 0.07);
}

.page-about .ov-role__no {
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--yb-orange-deep);
}

.page-about .ov-role__name {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--yb-ink);
}

.page-about .ov-role__count {
  display: block;
  margin-top: 4px;
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(10, 12, 18, 0.55);
}

.page-about .ov-role__note {
  max-width: 620px;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(10, 12, 18, 0.72);
}

/* ============ 05 覆盖与规模 ============ */
.page-about .ov-scale__map {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 34px 0 0;
  border: 1px solid rgba(198, 210, 227, 0.22);
  object-fit: cover;
}

.page-about .ov-metrics {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  border: 1px solid rgba(198, 210, 227, 0.2);
  background: rgba(198, 210, 227, 0.2);
}

.page-about .ov-metric {
  background: var(--yb-teal);
  padding: 24px 20px 26px;
  min-width: 0;
}

.page-about .ov-metric__value {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 6px;
  margin: 0;
}

.page-about .ov-metric__num {
  font-family: var(--yb-sans);
  font-weight: 900;
  font-size: clamp(44px, 9vw, 82px);
  line-height: 0.94;
  letter-spacing: -0.035em;
  color: var(--yb-paper);
  font-variant-numeric: tabular-nums;
}

.page-about .ov-metric__unit {
  font-size: 17px;
  font-weight: 700;
  color: var(--yb-lime);
}

.page-about .ov-metric__label {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(198, 210, 227, 0.85);
}

.page-about .ov-scale__note {
  max-width: 760px;
  margin: 28px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--yb-orange);
  font-size: 15px;
  line-height: 1.78;
  color: rgba(198, 210, 227, 0.9);
}

/* ============ 06 合作与认可 ============ */
.page-about .ov-eco__grid {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.page-about .ov-eco__tile {
  border: 1px solid rgba(255, 194, 75, 0.32);
  background: rgba(10, 12, 18, 0.2);
}

.page-about .ov-eco__tile > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--yb-paper);
}

.page-about .ov-eco__tile > summary::-webkit-details-marker {
  display: none;
}

.page-about .ov-eco__tile > summary::marker {
  content: "";
}

.page-about .ov-eco__tile > summary:focus-visible {
  outline: 1px solid var(--yb-lime);
  outline-offset: -2px;
}

.page-about .ov-eco__mark {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--yb-amber-tag);
}

.page-about .ov-eco__mark::before,
.page-about .ov-eco__mark::after {
  content: "";
  position: absolute;
  background: var(--yb-amber-tag);
}

.page-about .ov-eco__mark::before {
  left: 4px;
  right: 4px;
  top: 12px;
  height: 1px;
}

.page-about .ov-eco__mark::after {
  top: 4px;
  bottom: 4px;
  left: 12px;
  width: 1px;
}

.page-about .ov-eco__label {
  min-width: 0;
}

.page-about .ov-eco__num {
  margin-left: auto;
  flex: none;
  font-size: 14px;
  font-weight: 700;
  color: var(--yb-amber-tag);
  letter-spacing: 0.04em;
}

.page-about .ov-eco__info {
  margin: 0;
  padding: 16px 20px 20px;
  border-top: 1px solid rgba(255, 194, 75, 0.22);
  font-size: 14px;
  line-height: 1.78;
  color: rgba(242, 245, 250, 0.86);
}

/* ============ 07 长期服务 ============ */
.page-about .ov-promise__inner {
  display: grid;
  gap: 36px;
}

.page-about .ov-promise__text {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(198, 210, 227, 0.88);
}

.page-about .ov-promise__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--yb-line-strong);
  align-self: start;
}

.page-about .ov-promise__item {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--yb-line);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(198, 210, 227, 0.9);
}

.page-about .ov-promise__k {
  font-family: var(--yb-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--yb-lime);
  font-variant-numeric: tabular-nums;
}

/* ============ 收束 ============ */
.page-about .ov-next {
  padding: 56px 0 72px;
  background: var(--yb-deep-2);
}

.page-about .ov-next__title {
  margin: 0;
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--yb-paper);
}

.page-about .ov-next__grid {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .ov-next__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 24px;
  border: 1px solid var(--yb-line-strong);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.page-about .ov-next__card:hover,
.page-about .ov-next__card:focus-visible {
  border-color: var(--yb-orange);
  background: rgba(255, 106, 26, 0.09);
  transform: translateY(-3px);
}

.page-about .ov-next__no {
  font-family: var(--yb-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--yb-orange);
}

.page-about .ov-next__name {
  font-size: 17px;
  font-weight: 800;
  color: var(--yb-paper);
}

.page-about .ov-next__desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(198, 210, 227, 0.82);
}

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

  .page-about .ov-scope__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .ov-eco__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .ov-next__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .ov-section {
    padding: 82px 0;
  }

  .page-about .ov-hero__inner {
    padding-top: 60px;
    padding-bottom: 68px;
  }

  .page-about .ov-role {
    grid-template-columns: 52px 236px 1fr;
    align-items: start;
    gap: 24px;
    padding: 22px 0;
  }

  .page-about .ov-promise__inner {
    grid-template-columns: 1fr 400px;
    gap: 60px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .ov-hero__inner {
    grid-template-columns: 55fr 45fr;
    align-items: center;
    gap: 52px;
  }

  .page-about .ov-road__inner {
    grid-template-columns: 340px 1fr;
    gap: 60px;
    align-items: start;
  }

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

  .page-about .ov-eco__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1080px) {
  .page-about .ov-scope__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .ov-next__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ov-panel__dot {
    animation: none;
  }

  .page-about .ov-next__card {
    transition: none;
  }

  .page-about .ov-next__card:hover,
  .page-about .ov-next__card:focus-visible {
    transform: none;
  }
}