.page-about {
  --about-border: rgba(224, 224, 224, 0.14);
  --about-card-bg: rgba(26, 26, 46, 0.82);
  --about-grid-line: rgba(0, 240, 255, 0.05);
  position: relative;
  overflow-x: hidden;
  background:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px),
    var(--bg-deep);
  background-size: 36px 36px, 36px 36px, auto;
  color: var(--text-silver);
  font-family: var(--font-body);
  line-height: 1.6;
}
.page-about h1,
.page-about h2,
.page-about h3 {
  font-weight: 700;
}
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}
.page-about a:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}
.page-about .breadcrumb {
  margin-bottom: 28px;
}
.page-about .about-section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
}
.page-about .about-section-head .about-sec-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-orange);
  letter-spacing: 0.06em;
  line-height: 1.4;
  padding-top: 4px;
}
.page-about .about-section-head .about-sec-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.page-about .about-section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #fff;
  margin: 0;
}
.page-about .about-section-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0 0 32px;
  max-width: 48ch;
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 40px 20px 48px;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(0, 240, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.06) 1px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: linear-gradient(135deg, rgba(0, 0, 0, 0.85), transparent 72%);
  mask-image: linear-gradient(135deg, rgba(0, 0, 0, 0.85), transparent 72%);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange) 0%, var(--accent-orange) 18%, var(--accent-cyan) 18%, var(--accent-cyan) 30%, transparent 30%);
  opacity: 0.7;
}
.page-about .about-hero-decor {
  position: absolute;
  right: -80px;
  top: -80px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px solid rgba(0, 240, 255, 0.14);
  box-shadow: 0 0 0 24px rgba(0, 240, 255, 0.03), 0 0 0 48px rgba(0, 240, 255, 0.02);
  pointer-events: none;
}
.page-about .about-hero-inner {
  position: relative;
  display: grid;
  gap: 24px;
  max-width: var(--container-width);
  margin: 0 auto;
}
.page-about .about-hero-rail {
  border-left: 2px solid var(--accent-cyan);
  padding: 6px 0 6px 16px;
}
.page-about .about-hero-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 14px;
}
.page-about .about-hero-facts {
  margin: 0;
}
.page-about .about-hero-facts div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 9px 0;
  border-bottom: 1px solid var(--about-border);
}
.page-about .about-hero-facts dt {
  font-size: 13px;
  color: var(--text-muted);
}
.page-about .about-hero-facts dd {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-cyan);
  margin: 0;
  letter-spacing: 0.02em;
}
.page-about .about-hero-manifesto {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-silver);
  max-width: 30ch;
}
.page-about .about-hero-content {
  min-width: 0;
}
.page-about .about-hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-orange);
  margin: 0 0 10px;
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.12;
  letter-spacing: 0.015em;
  text-transform: uppercase;
  color: #fff;
  margin: 0 0 18px;
  max-width: 19ch;
}
.page-about .about-hero-lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
  margin: 0;
  max-width: 60ch;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ===== 品牌轨迹 ===== */
.page-about .about-timeline-section {
  position: relative;
  padding: 24px 20px 72px;
}
.page-about .about-timeline-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0.3;
}
.page-about .about-timeline-imgwrap {
  margin-bottom: 48px;
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--about-border);
  box-shadow: var(--shadow-card);
}
.page-about .about-timeline-imgwrap img {
  width: 100%;
}
.page-about .about-timeline-layout {
  display: grid;
  gap: 36px;
  max-width: var(--container-width);
  margin: 0 auto;
}
.page-about .about-section-rail {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.page-about .about-sec-num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
}
.page-about .about-section-rail h2 {
  font-family: var(--font-head);
  font-size: 32px;
  line-height: 1.15;
  text-transform: uppercase;
  color: #fff;
  margin: 8px 0 0;
}
.page-about .about-sec-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.page-about .about-sec-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 8px 0 0;
  max-width: 30ch;
}
.page-about .about-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.page-about .about-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
  border-radius: 4px;
  background: linear-gradient(180deg, transparent, var(--accent-orange) 6%, var(--accent-cyan) 32%, var(--accent-cyan) 60%, var(--accent-orange) 86%, transparent 100%);
  opacity: 0.32;
}
.page-about .about-milestone {
  position: relative;
  padding: 0 0 40px 36px;
}
.page-about .about-milestone:last-of-type {
  padding-bottom: 0;
}
.page-about .about-milestone::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--accent-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 26, 0.14), 0 0 18px rgba(255, 107, 26, 0.45);
  z-index: 1;
}
.page-about .about-milestone.is-right::before {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 4px rgba(0, 240, 255, 0.12), 0 0 18px rgba(0, 240, 255, 0.4);
}
.page-about .about-milestone-body {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius-card);
  padding: 18px 20px;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}
.page-about .about-milestone-body:hover {
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.page-about .about-milestone-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  margin-bottom: 8px;
}
.page-about .about-milestone-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  margin-bottom: 12px;
}
.page-about .about-milestone-body h3 {
  font-family: var(--font-head);
  font-size: 21px;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: #fff;
  margin: 0 0 8px;
}
.page-about .about-milestone-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}

/* 统计面板 */
.page-about .about-stats-band {
  position: relative;
  z-index: 2;
  margin: 28px 0 48px 36px;
  padding: 32px 22px;
  background:
    linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px),
    var(--bg-card);
  background-size: 28px 28px, 28px 28px, auto;
  border: 1px solid rgba(0, 240, 255, 0.18);
  border-radius: var(--radius-panel);
  overflow: hidden;
}
.page-about .about-stats-band::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-cyan));
  opacity: 0.85;
}
.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 16px;
}
.page-about .about-stat {
  position: relative;
  padding-left: 14px;
  border-left: 2px solid var(--accent-orange);
}
.page-about .about-stat:nth-child(even) {
  border-left-color: var(--accent-cyan);
}
.page-about .about-stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: #fff;
}
.page-about .about-stat-num small {
  font-family: var(--font-mono);
  font-size: 0.4em;
  color: var(--accent-orange);
  margin-left: 2px;
}
.page-about .about-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.page-about .about-stats-note {
  margin: 24px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-faint);
  border-top: 1px dashed rgba(224, 224, 224, 0.16);
  padding-top: 16px;
}

/* ===== 服务体系 ===== */
.page-about .about-services {
  padding: 72px 20px;
  background: var(--bg-overlay);
  border-top: 1px solid var(--about-border);
  border-bottom: 1px solid var(--about-border);
}
.page-about .about-services-head {
  max-width: var(--container-width);
  margin: 0 auto 32px;
}
.page-about .about-services-grid {
  display: grid;
  gap: 28px;
  max-width: var(--container-width);
  margin: 0 auto 40px;
}
.page-about .about-services-img {
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--about-border);
  box-shadow: var(--shadow-card);
  transform: rotate(-1.2deg) translateY(6px);
  transition: transform var(--transition-base);
}
.page-about .about-services-img:hover {
  transform: rotate(0deg) translateY(0);
}
.page-about .about-services-img img {
  width: 100%;
}
.page-about .about-services-cards {
  display: grid;
  gap: 14px;
}
.page-about .about-service-card {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius-card);
  padding: 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.page-about .about-service-card:hover {
  border-color: rgba(0, 240, 255, 0.32);
  box-shadow: var(--shadow-card);
}
.page-about .about-service-card-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent-orange);
}
.page-about .about-service-card h3 {
  font-family: var(--font-head);
  font-size: 20px;
  line-height: 1.3;
  color: #fff;
  margin: 10px 0 8px;
}
.page-about .about-service-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}
.page-about .about-customer-path {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  gap: 20px;
  background: linear-gradient(135deg, rgba(255, 107, 26, 0.12), rgba(123, 47, 247, 0.08));
  border: 1px solid rgba(255, 107, 26, 0.22);
  border-radius: var(--radius-panel);
  padding: 24px;
}
.page-about .about-customer-path-head p {
  font-family: var(--font-head);
  font-size: 21px;
  line-height: 1.4;
  color: #fff;
  margin: 12px 0 0;
}
.page-about .about-customer-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}
.page-about .about-customer-steps li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(224, 224, 224, 0.14);
}
.page-about .about-customer-steps li:first-child {
  padding-top: 0;
}
.page-about .about-customer-steps li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .about-customer-steps li span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--accent-orange);
  background: rgba(255, 107, 26, 0.1);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  white-space: nowrap;
}
.page-about .about-customer-steps li p {
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-silver);
  margin: 0;
}

/* ===== 调优成果 ===== */
.page-about .about-results {
  position: relative;
  padding: 72px 20px;
  background: var(--bg-deep);
}
.page-about .about-results::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.1), transparent 70%);
  pointer-events: none;
}
.page-about .about-results-head {
  max-width: var(--container-width);
  margin: 0 auto 32px;
}
.page-about .about-results-grid {
  display: grid;
  gap: 32px;
  max-width: var(--container-width);
  margin: 0 auto;
}
.page-about .about-results-img {
  border-radius: var(--radius-panel);
  overflow: hidden;
  border: 1px solid var(--about-border);
  box-shadow: var(--shadow-float);
}
.page-about .about-results-img img {
  width: 100%;
}
.page-about .about-results-list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-results-list li {
  display: flex;
  gap: 16px;
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius-card);
  padding: 18px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.page-about .about-results-list li:hover {
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: var(--shadow-card);
}
.page-about .about-results-check {
  font-size: 20px;
  line-height: 1.4;
  color: var(--ok-green);
  flex-shrink: 0;
}
.page-about .about-results-list h3 {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin: 0 0 6px;
}
.page-about .about-results-list p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0;
}
.page-about .about-results-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 信任保障 ===== */
.page-about .about-trust {
  padding: 72px 20px;
  max-width: var(--container-width);
  margin: 0 auto;
}
.page-about .about-trust-head {
  margin-bottom: 0;
}
.page-about .about-trust-grid {
  display: grid;
  gap: 16px;
}
.page-about .about-trust-card {
  position: relative;
  overflow: hidden;
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius-card);
  padding: 22px 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.page-about .about-trust-card:hover {
  border-color: rgba(255, 107, 26, 0.35);
  box-shadow: var(--shadow-card);
}
.page-about .about-trust-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-cyan));
  opacity: 0.6;
}
.page-about .about-trust-index {
  position: absolute;
  top: 14px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: rgba(0, 240, 255, 0.14);
}
.page-about .about-trust-card h3 {
  font-family: var(--font-head);
  font-size: 20px;
  line-height: 1.3;
  color: #fff;
  margin: 0 0 10px;
}
.page-about .about-trust-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}
.page-about .about-trust-cta {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--about-border);
  padding-top: 28px;
}
.page-about .about-trust-cta p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
  max-width: 52ch;
}

/* ===== 平板与桌面增强 ===== */
@media (min-width: 640px) {
  .page-about .about-stats-grid {
    gap: 32px 24px;
  }
  .page-about .about-trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 56px 32px 72px;
  }
  .page-about .about-hero-inner {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 64px;
    padding: 0 32px;
  }
  .page-about .about-hero-rail {
    position: sticky;
    top: 120px;
    align-self: start;
    border-left-color: var(--accent-orange);
  }

  .page-about .about-timeline-section {
    padding: 24px 32px 96px;
  }
  .page-about .about-timeline-imgwrap {
    margin-bottom: 56px;
  }
  .page-about .about-timeline-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 56px;
    padding: 0 32px;
  }
  .page-about .about-section-rail {
    position: sticky;
    top: 120px;
    align-self: start;
  }
  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }
  .page-about .about-milestone {
    padding: 0 0 48px;
  }
  .page-about .about-milestone.is-left {
    width: 50%;
    margin-right: auto;
    padding-right: 44px;
    text-align: right;
  }
  .page-about .about-milestone.is-right {
    width: 50%;
    margin-left: auto;
    padding-left: 44px;
  }
  .page-about .about-milestone.is-left::before {
    left: auto;
    right: -8px;
  }
  .page-about .about-milestone.is-right::before {
    right: auto;
    left: -8px;
  }
  .page-about .about-milestone.is-left .about-milestone-body {
    transform: translateY(14px) rotate(0.4deg);
  }
  .page-about .about-milestone.is-right .about-milestone-body {
    transform: translateY(-14px) rotate(-0.4deg);
  }
  .page-about .about-milestone.is-left .about-milestone-body:hover,
  .page-about .about-milestone.is-right .about-milestone-body:hover {
    transform: translateY(-2px) rotate(0deg);
  }
  .page-about .about-stats-band {
    margin: 40px 0 64px;
    padding: 40px 32px;
  }
  .page-about .about-stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about .about-services {
    padding: 96px 32px;
  }
  .page-about .about-services-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 48px;
    align-items: center;
  }
  .page-about .about-services-img {
    transform: rotate(-1.8deg) translateY(10px);
    box-shadow: var(--shadow-float);
  }
  .page-about .about-customer-path {
    grid-template-columns: 1fr 1.2fr;
    align-items: center;
    gap: 32px;
    padding: 32px;
  }

  .page-about .about-results {
    padding: 96px 32px;
  }
  .page-about .about-results-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding: 0 32px;
  }

  .page-about .about-trust {
    padding: 96px 32px;
  }
  .page-about .about-trust-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition: none !important;
  }
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .page-about .about-services-img,
  .page-about .about-milestone.is-left .about-milestone-body,
  .page-about .about-milestone.is-right .about-milestone-body {
    transform: none;
  }
}