.page-about {
  --about-line: rgba(59, 125, 216, 0.2);
  --about-gold-line: rgba(212, 175, 55, 0.32);
  --about-grid: rgba(59, 125, 216, 0.07);
  --about-glow: rgba(212, 175, 55, 0.12);
  background: var(--navy-950);
  color: var(--off-white);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.7;
}

.page-about .container {
  max-width: var(--content-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.page-about .section-label-row {
  margin-bottom: 12px;
}

.page-about .section-label {
  font-family: var(--font-numeric);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold-500);
  text-transform: uppercase;
}

.page-about .section-label::before {
  content: "// ";
  color: var(--blue-400);
}

.page-about .about-section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: 0.03em;
  margin: 0 0 12px;
  color: var(--off-white);
}

.page-about .about-section-intro {
  font-size: 15px;
  color: var(--slate-300);
  max-width: 680px;
  margin: 0 0 32px;
  line-height: 1.8;
}

.page-about .about-highlight {
  color: var(--gold-300);
  font-weight: 500;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 88px;
  overflow: hidden;
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 22, 38, 0.88) 0%, rgba(11, 22, 38, 0.72) 60%, rgba(11, 22, 38, 0.92) 100%),
    linear-gradient(90deg, rgba(59, 125, 216, 0.18) 1px, transparent 1px),
    linear-gradient(rgba(59, 125, 216, 0.18) 1px, transparent 1px);
  background-size: 100% 100%, 36px 36px, 36px 36px;
}

.page-about .about-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.4;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 48px;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.page-about .about-hero-kicker {
  font-family: var(--font-numeric);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--gold-500);
  margin: 0 0 16px;
  text-transform: uppercase;
}

.page-about .about-hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(46px, 7vw, 96px);
  line-height: 1.04;
  letter-spacing: 0.02em;
  margin: 0 0 20px;
  color: var(--off-white);
  border-left: 4px solid var(--gold-500);
  padding-left: 20px;
}

.page-about .about-hero-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate-300);
  max-width: 620px;
  margin: 0 0 32px;
}

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

.page-about .about-hero-v4 {
  position: absolute;
  right: -20px;
  bottom: -40px;
  z-index: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(140px, 26vw, 340px);
  line-height: 0.8;
  color: var(--gold-500);
  opacity: 0.07;
  pointer-events: none;
  letter-spacing: -0.02em;
  user-select: none;
}

/* ===== 品牌坐标 ===== */
.page-about .about-coords {
  padding: 48px 0 64px;
  background:
    linear-gradient(rgba(59, 125, 216, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 125, 216, 0.055) 1px, transparent 1px);
  background-size: 32px 32px;
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
}

.page-about .about-coords-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.page-about .about-coord {
  position: relative;
  background: var(--navy-900);
  border: 1px solid var(--border-dim);
  border-left: 3px solid var(--blue-400);
  padding: 20px 16px 16px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: border-color 0.2s ease;
}

.page-about .about-coord:hover {
  border-left-color: var(--gold-500);
}

.page-about .about-coord-index {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--font-numeric);
  font-size: 12px;
  color: var(--slate-300);
  opacity: 0.5;
}

.page-about .about-coord-label {
  display: block;
  font-size: 13px;
  color: var(--slate-300);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.page-about .about-coord-num {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 6vw, 58px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--off-white);
}

.page-about .about-coord-unit {
  display: inline-block;
  font-family: var(--font-numeric);
  font-size: 14px;
  color: var(--gold-500);
  margin-left: 4px;
  vertical-align: 8px;
  letter-spacing: 0.06em;
}

.page-about .about-coord-desc {
  font-size: 13px;
  color: var(--slate-300);
  line-height: 1.65;
  margin: 10px 0 0;
}

/* ===== 时间轴 ===== */
.page-about .about-timeline {
  padding: 48px 0 64px;
  background: var(--navy-900);
}

.page-about .about-timeline .section-label {
  color: var(--gold-500);
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 40px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-400), var(--gold-500));
  opacity: 0.35;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 36px 36px;
}

.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(11, 22, 38, 0.6), 0 0 12px var(--about-glow);
}

.page-about .about-timeline-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-timeline-ver {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--gold-500);
}

.page-about .about-timeline-year {
  font-family: var(--font-numeric);
  font-size: 15px;
  color: var(--blue-400);
}

.page-about .about-timeline-item h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 8px 0 6px;
  color: var(--off-white);
  letter-spacing: 0.02em;
}

.page-about .about-timeline-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-300);
  margin: 0;
  max-width: 520px;
}

/* ===== 数据覆盖 ===== */
.page-about .about-data {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border-dim);
}

.page-about .about-data-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-data-copy p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-300);
  margin: 0 0 16px;
}

.page-about .about-data-copy strong {
  color: var(--off-white);
}

.page-about .about-data-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 24px 0;
}

.page-about .about-data-metric {
  background: var(--navy-900);
  border: 1px solid var(--border-dim);
  padding: 16px 10px;
  text-align: center;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-about .about-data-num {
  display: block;
  font-family: var(--font-numeric);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.1;
  color: var(--orange-500);
}

.page-about .about-data-label {
  display: block;
  font-size: 12px;
  color: var(--slate-300);
  margin-top: 6px;
  letter-spacing: 0.04em;
}

.page-about .about-data-note {
  font-size: 14px;
  color: var(--slate-300);
  background: rgba(28, 49, 83, 0.35);
  border-left: 3px solid var(--blue-400);
  padding: 12px 14px;
  margin: 0 0 24px;
}

.page-about .about-data-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-dim);
  background: var(--navy-900);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .about-data-media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-data-media .media-label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-300);
  background: rgba(11, 22, 38, 0.78);
  padding: 4px 10px;
  border: 1px solid rgba(212, 175, 55, 0.28);
}

/* ===== 团队协作 ===== */
.page-about .about-team {
  padding: 48px 0 64px;
  background: var(--navy-900);
  border-top: 1px solid var(--border-dim);
}

.page-about .about-team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-team-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-dim);
  background: var(--navy-950);
}

.page-about .about-team-media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

.page-about .about-team-media .media-label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-300);
  background: rgba(11, 22, 38, 0.78);
  padding: 4px 10px;
  border: 1px solid rgba(212, 175, 55, 0.28);
}

.page-about .about-team-copy p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-300);
  margin: 0 0 16px;
}

.page-about .about-team-copy strong {
  color: var(--off-white);
}

.page-about .about-team-roles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-team-role {
  position: relative;
  background: var(--navy-950);
  border: 1px solid var(--border-dim);
  padding: 16px 14px 14px 18px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .about-team-role-index {
  font-family: var(--font-numeric);
  font-size: 12px;
  color: var(--blue-400);
  display: block;
  margin-bottom: 8px;
}

.page-about .about-team-role h3 {
  font-family: var(--font-display);
  font-size: 17px;
  margin: 0 0 6px;
  color: var(--off-white);
  letter-spacing: 0.02em;
}

.page-about .about-team-role p {
  font-size: 13px;
  color: var(--slate-300);
  margin: 0;
  line-height: 1.5;
}

/* ===== 信任与合规 ===== */
.page-about .about-trust {
  padding: 48px 0 72px;
  border-top: 1px solid var(--border-dim);
}

.page-about .about-trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-trust-card {
  position: relative;
  background: var(--navy-900);
  border: 1px solid rgba(212, 175, 55, 0.22);
  border-top: 3px solid var(--gold-500);
  padding: 28px 22px 22px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: border-color 0.2s ease;
}

.page-about .about-trust-card:hover {
  border-color: rgba(212, 175, 55, 0.45);
}

.page-about .about-trust-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--navy-950);
  background: var(--gold-500);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-about .about-trust-badge svg {
  width: 28px;
  height: 28px;
}

.page-about .about-trust-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.03em;
  margin: 0 0 10px;
  color: var(--off-white);
}

.page-about .about-trust-card p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-300);
  margin: 0;
}

.page-about .about-trust-footnote {
  margin-top: 36px;
  padding: 28px 24px;
  background: rgba(28, 49, 83, 0.3);
  border-left: 4px solid var(--gold-500);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-trust-footnote p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-300);
  margin: 0;
  max-width: 760px;
}

.page-about .about-trust-footnote a {
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .about-trust-footnote .btn {
  align-self: flex-start;
}

/* ===== 响应式：平板 ===== */
@media (min-width: 640px) {
  .page-about .about-coords-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

  .page-about .about-data-metrics {
    gap: 16px;
  }

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

  .page-about .about-hero-v4 {
    bottom: -20px;
  }
}

/* ===== 响应式：桌面 ===== */
@media (min-width: 992px) {
  .page-about .about-hero {
    padding: 56px 0 120px;
  }

  .page-about .about-hero-title {
    font-size: clamp(64px, 7vw, 110px);
  }

  .page-about .about-hero-lead {
    font-size: 17px;
  }

  .page-about .about-coords,
  .page-about .about-timeline,
  .page-about .about-data,
  .page-about .about-team,
  .page-about .about-trust {
    padding: 72px 0 88px;
  }

  .page-about .about-section-intro {
    font-size: 16px;
  }

  .page-about .about-timeline-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
  }

  .page-about .about-timeline-list::before {
    left: 0;
    right: 0;
    top: 10px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--blue-400), var(--gold-500));
    opacity: 0.32;
  }

  .page-about .about-timeline-item {
    padding: 0;
  }

  .page-about .about-timeline-item::before {
    left: 0;
    top: 6px;
  }

  .page-about .about-timeline-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    margin-bottom: 14px;
  }

  .page-about .about-timeline-item p {
    max-width: 300px;
  }

  .page-about .about-data-layout {
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 52px;
  }

  .page-about .about-team-layout {
    grid-template-columns: 1fr 1.1fr;
    align-items: center;
    gap: 52px;
  }

  .page-about .about-team-layout .about-team-media {
    order: 1;
  }

  .page-about .about-team-layout .about-team-copy {
    order: 2;
  }

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

  .page-about .about-trust-grid .about-trust-card:last-child {
    grid-column: auto;
  }

  .page-about .about-trust-footnote {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .about-trust-footnote .btn {
    flex-shrink: 0;
    margin-left: 32px;
  }
}