.page-about {
  --ov-space: clamp(18px, 3vw, 34px);
  --ov-rhythm: clamp(56px, 8vw, 108px);
  --ov-hair: rgba(241, 206, 131, 0.22);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-about .ov-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper-white);
  padding: clamp(24px, 4vw, 44px) 0 clamp(48px, 7vw, 96px);
}

.page-about .ov-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: 66%;
  height: 156%;
  background: linear-gradient(150deg, rgba(217, 164, 65, 0.2), rgba(217, 164, 65, 0) 62%);
  transform: skewX(-13deg);
  pointer-events: none;
  z-index: -1;
}

.page-about .ov-hero::after {
  content: "";
  position: absolute;
  left: -6%;
  bottom: -30%;
  width: 46%;
  height: 62%;
  background: radial-gradient(closest-side, rgba(46, 139, 114, 0.2), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-about .ov-breadcrumb {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .ov-breadcrumb a {
  color: var(--gold);
  text-decoration: none;
}

.page-about .ov-breadcrumb a:hover {
  color: var(--gold-bright);
}

.page-about .ov-breadcrumb li[aria-current="page"] {
  color: var(--on-ink-soft);
}

.page-about .ov-hero-inner {
  display: grid;
  gap: clamp(30px, 4.6vw, 64px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-about .ov-hero-copy .kicker {
  color: var(--gold);
  margin-bottom: 16px;
}

.page-about .ov-hero h1 {
  font-size: clamp(32px, 5.6vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  color: var(--paper-white);
  text-shadow: 0 0 0 rgba(0, 0, 0, 0);
}

.page-about .ov-hero .lead {
  color: var(--on-ink);
  max-width: 34em;
  margin-bottom: 28px;
}

.page-about .ov-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ov-hero-aside {
  display: grid;
  gap: 20px;
}

.page-about .ov-hero-media {
  position: relative;
  border: 1px solid var(--ov-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
}

.page-about .ov-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.92;
}

.page-about .ov-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--ov-hair);
  border: 1px solid var(--ov-hair);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ov-fact {
  background: var(--ink-2);
  padding: 16px 14px;
  display: grid;
  gap: 6px;
}

.page-about .ov-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: -0.02em;
}

.page-about .ov-fact-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-ink-soft);
}

/* ============ 手机端场景 ============ */
.page-about .ov-mobile .section-head {
  max-width: 760px;
  margin-bottom: clamp(34px, 4.6vw, 60px);
}

.page-about .ov-mobile-grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-about .ov-mobile-media .media-frame {
  border-radius: var(--radius);
}

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

.page-about .ov-mobile-media .media-caption {
  margin-top: 12px;
}

.page-about .ov-mobile-steps {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .ov-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 16px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .ov-step-tag {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold-deep);
  padding-bottom: 4px;
}

.page-about .ov-step-body h3 {
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--text);
}

.page-about .ov-step-body p {
  margin: 0;
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .ov-mobile-result {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(217, 164, 65, 0.12), rgba(251, 247, 241, 0.9));
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .ov-mobile-result-title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
  text-transform: uppercase;
}

.page-about .ov-mobile-result-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .ov-mobile-link {
  margin: 4px 0 0;
}

/* ============ 版本时间轴 ============ */
.page-about .ov-timeline {
  position: relative;
  overflow: hidden;
}

.page-about .ov-timeline::before {
  content: "";
  position: absolute;
  inset: -28% -10% auto -10%;
  height: 66%;
  background: radial-gradient(58% 100% at 18% 0%, rgba(217, 164, 65, 0.2), transparent 70%);
  pointer-events: none;
}

.page-about .ov-timeline .wrap {
  position: relative;
  z-index: 1;
}

.page-about .ov-timeline .section-head {
  max-width: 720px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .ov-timeline-figure {
  margin-bottom: clamp(34px, 5vw, 64px);
  border: 1px solid var(--ov-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .ov-timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.85;
}

.page-about .ov-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(26px, 3.6vw, 44px);
}

.page-about .ov-track::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(217, 164, 65, 0.42) 48%, rgba(217, 164, 65, 0.08) 100%);
}

.page-about .ov-node {
  position: relative;
  padding-left: 76px;
}

.page-about .ov-node-marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gold-bright);
  background: var(--ink);
  border: 2px solid var(--gold);
  border-radius: var(--radius);
  z-index: 1;
}

.page-about .ov-node-card {
  background: var(--ink-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: clamp(18px, 2.6vw, 30px);
}

.page-about .ov-node-card h3 {
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.35;
  margin: 12px 0 10px;
  color: var(--paper-white);
}

.page-about .ov-node-card > p:not(.tag) {
  margin: 0;
  color: var(--on-ink);
  font-size: 16px;
  line-height: 1.75;
  max-width: 40em;
}

.page-about .ov-node-more {
  margin-top: 16px;
}

.page-about .ov-node-more .collapse-trigger {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
  background: transparent;
  border: 1px solid var(--ov-hair);
  border-radius: var(--radius);
  padding: 9px 14px;
  cursor: pointer;
  transition: background 240ms var(--ease), color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .ov-node-more .collapse-trigger:hover {
  background: rgba(217, 164, 65, 0.12);
  border-color: var(--gold);
  color: var(--gold-bright);
}

.page-about .ov-node-more .collapse-trigger[aria-expanded="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.page-about .collapse-panel {
  padding-top: 14px;
}

.page-about .ov-node-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ov-node-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--on-ink);
}

.page-about .ov-node-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

.page-about .ov-node-list--2col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 18px;
}

/* ============ 中段留白 ============ */
.page-about .ov-breath {
  background: var(--paper-white);
  padding: clamp(64px, 11vw, 150px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ov-breath-inner {
  display: grid;
  gap: 18px;
  justify-items: start;
}

.page-about .ov-breath-num {
  font-family: var(--font-mono);
  font-size: clamp(72px, 16vw, 180px);
  line-height: 0.86;
  margin: 0;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 2px var(--gold);
  text-stroke: 2px var(--gold);
}

.page-about .ov-breath-text {
  margin: 0;
  max-width: 26em;
  font-size: clamp(17px, 2.2vw, 22px);
  line-height: 1.6;
  color: var(--text);
}

/* ============ 团队 ============ */
.page-about .ov-team-grid {
  margin-bottom: clamp(24px, 3vw, 38px);
}

.page-about .ov-team-card {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 28px);
  transition: transform 260ms var(--ease), box-shadow 260ms var(--ease);
}

.page-about .ov-team-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(13, 12, 10, 0.09);
}

.page-about .ov-team-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  margin: 0 0 12px;
}

.page-about .ov-team-card h3 {
  font-size: clamp(18px, 2.2vw, 22px);
  margin: 0 0 10px;
  color: var(--text);
}

.page-about .ov-team-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .ov-team-note {
  margin: 0;
  padding: 16px 20px;
  border-left: 3px solid var(--jade);
  background: rgba(46, 139, 114, 0.08);
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

/* ============ 覆盖范围 ============ */
.page-about .ov-reach {
  background: linear-gradient(135deg, rgba(217, 164, 65, 0.16), var(--paper) 58%);
}

.page-about .ov-reach-grid {
  display: grid;
  gap: clamp(30px, 5vw, 72px);
  grid-template-columns: 1fr;
  align-items: center;
}

.page-about .ov-reach-copy h2 {
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
  margin: 14px 0 18px;
  color: var(--text);
}

.page-about .ov-reach-copy .lead {
  margin-bottom: 16px;
}

.page-about .ov-reach-text {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 36em;
}

.page-about .ov-reach-link {
  margin: 0;
}

.page-about .ov-reach-figure {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper-white);
  padding: clamp(26px, 4vw, 46px);
  position: relative;
  overflow: hidden;
}

.page-about .ov-reach-figure::after {
  content: "";
  position: absolute;
  right: -30%;
  bottom: -40%;
  width: 72%;
  height: 110%;
  background: radial-gradient(closest-side, rgba(224, 115, 58, 0.28), transparent 70%);
  pointer-events: none;
}

.page-about .ov-reach-num {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: clamp(72px, 13vw, 132px);
  line-height: 0.9;
  margin: 0;
  letter-spacing: -0.05em;
  color: var(--gold);
}

.page-about .ov-reach-unit {
  position: relative;
  z-index: 1;
  margin: 10px 0 20px;
  font-size: 16px;
  letter-spacing: 0.14em;
  color: var(--gold-bright);
}

.page-about .ov-reach-sub {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-ink);
  max-width: 24em;
}

/* ============ 资质与合作 ============ */
.page-about .ov-trust .section-head {
  max-width: 720px;
  margin-bottom: clamp(32px, 4.4vw, 56px);
}

.page-about .ov-trust-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
  margin-bottom: clamp(34px, 4.6vw, 56px);
}

.page-about .ov-trust-card {
  border-radius: var(--radius);
  padding: clamp(20px, 2.6vw, 30px);
}

.page-about .ov-trust-card--solid {
  background: var(--ink-2);
  border: 1px solid var(--line-dark);
}

.page-about .ov-trust-card--glass {
  background: var(--glass);
  border: 1px solid var(--ov-hair);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-about .ov-trust-card h3 {
  font-size: clamp(18px, 2.2vw, 21px);
  margin: 0 0 16px;
  color: var(--gold-bright);
}

.page-about .ov-trust-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ov-trust-list li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--on-ink);
}

.page-about .ov-trust-list .status-dot {
  margin-top: 0.55em;
}

.page-about .ov-trust-cta {
  border-top: 1px solid var(--line-dark);
  padding-top: clamp(24px, 3vw, 36px);
  display: grid;
  gap: 18px;
}

.page-about .ov-trust-cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--on-ink);
  max-width: 40em;
}

.page-about .ov-trust-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 响应式 ============ */
@media (min-width: 760px) {
  .page-about .ov-mobile-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

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

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

  .page-about .ov-trust-card:first-child {
    grid-column: span 2;
  }

  .page-about .ov-trust-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .ov-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-about .ov-reach-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

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

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

  .page-about .ov-trust-card:first-child {
    grid-column: span 1;
  }

  .page-about .ov-node:nth-child(even) {
    margin-left: clamp(0px, 5vw, 84px);
  }

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

@media (max-width: 420px) {
  .page-about .ov-facts {
    grid-template-columns: 1fr;
  }

  .page-about .ov-node {
    padding-left: 60px;
  }

  .page-about .ov-node-marker {
    width: 40px;
    height: 40px;
    font-size: 12px;
  }

  .page-about .ov-track::before {
    left: 19px;
  }

  .page-about .ov-node-list--2col {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ov-team-card {
    transition: none;
  }

  .page-about .ov-team-card:hover {
    transform: none;
  }
}