.page-about {
  --about-accent: #FF6B35;
  --about-data: #00C9A7;
  --about-panel: #112240;
  --about-border: rgba(255, 255, 255, 0.1);
  --about-muted: #8892B0;
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

/* ===== 通用容器 ===== */
.page-about .container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.page-about .section-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-accent);
}

.page-about .section-index::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: linear-gradient(to right, var(--about-accent), transparent);
}

.page-about .section-title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(1.8rem, 3.4vw, 2.9rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.page-about .page-intro {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-muted);
  max-width: 640px;
}

.page-about .body-text p {
  margin: 0 0 16px;
  line-height: 1.9;
  color: var(--color-text);
}

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

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 48px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--about-muted);
}

.page-about .breadcrumb a {
  color: var(--about-muted);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--about-accent);
}

.page-about .breadcrumb-current {
  color: var(--color-text);
}

/* ===== 01 品牌宣言 Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 32px 0 clamp(64px, 10vw, 120px);
  background:
    radial-gradient(ellipse 55% 45% at 88% 15%, rgba(255, 107, 53, 0.08), transparent),
    radial-gradient(ellipse 40% 35% at 8% 82%, rgba(0, 201, 167, 0.07), transparent);
}

.page-about .about-hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
  align-items: center;
}

.page-about .about-hero-brand {
  display: block;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text) 55%, var(--about-data) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .display-heading {
  margin: 20px 0 28px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2.5rem, 5.6vw, 4.4rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.page-about .about-hero-lead {
  max-width: 560px;
  margin: 0 0 28px;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.95;
  color: var(--about-muted);
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.page-about .about-hero-tags .tag {
  display: inline-flex;
  padding: 6px 14px;
  border: 1px solid var(--about-border);
  border-radius: var(--radius-pill);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--about-data);
  background: rgba(0, 201, 167, 0.06);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: all 0.3s var(--ease-out);
}

.page-about .btn-primary {
  background: var(--about-accent);
  border: 1px solid var(--about-accent);
  color: #fff;
}

.page-about .btn-primary:hover {
  background: #e85a2a;
  border-color: #e85a2a;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.25);
}

.page-about .btn-ghost {
  background: transparent;
  border: 1px solid var(--about-border);
  color: var(--color-text);
}

.page-about .btn-ghost:hover {
  border-color: var(--about-data);
  color: var(--about-data);
  background: rgba(0, 201, 167, 0.06);
  transform: translateY(-2px);
}

.page-about .about-hero-visual {
  position: relative;
}

.page-about .about-hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-border);
  background:
    linear-gradient(135deg, rgba(0, 201, 167, 0.08), rgba(255, 107, 53, 0.08)),
    var(--color-bg-panel);
}

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

.page-about .about-hero-chips {
  position: absolute;
  bottom: 18px;
  left: 18px;
  right: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-chip {
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  backdrop-filter: blur(8px);
  border: 1px solid var(--about-border);
}

.page-about .about-chip--orange {
  background: rgba(255, 107, 53, 0.78);
  color: #fff;
}

.page-about .about-chip--mint {
  background: rgba(0, 201, 167, 0.78);
  color: #04221c;
}

/* ===== 02 品牌宣言 / 我们是谁 ===== */
.page-about .about-who {
  position: relative;
  padding: clamp(64px, 10vw, 120px) 0;
  border-top: 1px solid var(--about-border);
}

.page-about .about-who-head {
  max-width: 860px;
  margin-bottom: 48px;
}

.page-about .about-who-manifesto {
  margin: 12px 0 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.6;
  color: var(--about-data);
  max-width: 720px;
}

.page-about .about-who-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: start;
}

.page-about .about-who-text {
  max-width: 620px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
}

.page-about .about-who-text p {
  margin-bottom: 20px;
}

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

.page-about .about-who-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.page-about .about-metric-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 22px;
  border: 1px solid var(--about-border);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(17, 34, 64, 0.55), rgba(17, 34, 64, 0.2));
  transition: all 0.35s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.page-about .about-metric-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, var(--about-accent), transparent 70%);
  opacity: 0.6;
}

.page-about .about-metric-card:hover {
  border-color: rgba(255, 107, 53, 0.4);
  transform: translateY(-4px);
  background: linear-gradient(160deg, rgba(17, 34, 64, 0.85), rgba(17, 34, 64, 0.45));
  box-shadow: 0 10px 32px rgba(2, 12, 27, 0.35);
}

.page-about .about-metric-value {
  font-family: var(--font-data);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.page-about .about-metric-unit {
  font-size: 0.6em;
  color: var(--about-accent);
  margin-left: 2px;
  vertical-align: top;
}

.page-about .about-metric-label {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--about-muted);
}

/* ===== 03 发展里程碑 ===== */
.page-about .about-milestones {
  padding: clamp(64px, 10vw, 120px) 0;
  border-top: 1px solid var(--about-border);
  background:
    radial-gradient(ellipse 45% 30% at 70% 10%, rgba(255, 107, 53, 0.05), transparent),
    linear-gradient(180deg, rgba(17, 34, 64, 0.2), transparent 30%);
}

.page-about .about-milestones-head {
  max-width: 820px;
  margin-bottom: 60px;
}

.page-about .about-milestones-intro {
  margin: 12px 0 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-muted);
  max-width: 680px;
}

.page-about .about-timeline {
  position: relative;
  max-width: 920px;
  margin-inline: auto;
  padding-left: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--about-border) 5%, var(--about-border) 95%, transparent);
}

.page-about .about-timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 22px;
  padding-bottom: 44px;
}

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

.page-about .about-timeline-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 1;
}

.page-about .about-timeline-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--about-accent);
  box-shadow: 0 0 0 5px rgba(255, 107, 53, 0.12);
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-period {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--about-data);
  writing-mode: horizontal-tb;
  text-align: center;
}

.page-about .about-timeline-card {
  padding: 22px 24px;
  border: 1px solid var(--about-border);
  border-radius: var(--radius-md);
  background: rgba(17, 34, 64, 0.42);
  transition: all 0.35s var(--ease-out);
}

.page-about .about-timeline-card:hover {
  border-color: rgba(0, 201, 167, 0.35);
  background: rgba(17, 34, 64, 0.75);
  transform: translateX(4px);
}

.page-about .about-timeline-title {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--color-text);
}

.page-about .about-timeline-desc {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-muted);
}

/* ===== 04 数据来源与能力 ===== */
.page-about .about-data {
  padding: clamp(64px, 10vw, 120px) 0;
  border-top: 1px solid var(--about-border);
  background:
    radial-gradient(ellipse 40% 35% at 85% 20%, rgba(0, 201, 167, 0.06), transparent),
    linear-gradient(180deg, transparent, rgba(17, 34, 64, 0.3));
}

.page-about .about-data-head {
  max-width: 820px;
  margin-bottom: 56px;
}

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}

.page-about .about-data-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-flow-step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 18px;
  align-items: start;
  padding: 20px 22px;
  border: 1px solid var(--about-border);
  border-radius: var(--radius-md);
  background: rgba(17, 34, 64, 0.35);
  transition: all 0.3s var(--ease-out);
}

.page-about .about-flow-step:hover {
  border-color: rgba(255, 107, 53, 0.4);
  background: rgba(17, 34, 64, 0.7);
  transform: translateX(6px);
}

.page-about .about-flow-index {
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 700;
  color: var(--about-accent);
  padding-top: 3px;
}

.page-about .about-flow-title {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--color-text);
}

.page-about .about-flow-desc {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .about-data-panel {
  border: 1px solid var(--about-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-panel);
  box-shadow: 0 18px 50px rgba(2, 12, 27, 0.45);
}

.page-about .about-data-panel-media {
  overflow: hidden;
  border-bottom: 1px solid var(--about-border);
  background: #0a192f;
}

.page-about .about-data-panel-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-data-panel-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--about-border);
}

.page-about .about-stat-block {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 22px 20px;
  background: var(--color-bg-panel);
}

.page-about .about-stat-num {
  font-family: var(--font-data);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--about-data);
  line-height: 1;
}

.page-about .about-stat-desc {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--about-muted);
}

.page-about .about-data-panel-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 16px 20px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-muted);
  border-top: 1px solid var(--about-border);
}

.page-about .about-data-dot {
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--about-data);
  box-shadow: 0 0 0 4px rgba(0, 201, 167, 0.15);
}

/* ===== 05 团队与文化 ===== */
.page-about .about-team {
  padding: clamp(64px, 10vw, 120px) 0;
  border-top: 1px solid var(--about-border);
}

.page-about .about-team-head {
  max-width: 820px;
  margin-bottom: 52px;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 48px;
}

.page-about .about-team-card {
  position: relative;
  padding: 30px 28px;
  border: 1px solid var(--about-border);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(17, 34, 64, 0.7), rgba(17, 34, 64, 0.2));
  overflow: hidden;
  transition: all 0.35s var(--ease-out);
}

.page-about .about-team-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--about-accent);
  opacity: 0.8;
  border-radius: 0 3px 3px 0;
}

.page-about .about-team-card--data::before {
  background: var(--about-data);
}

.page-about .about-team-card--service::before {
  background: var(--color-warning);
}

.page-about .about-team-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 107, 53, 0.35);
  box-shadow: 0 14px 36px rgba(2, 12, 27, 0.4);
}

.page-about .about-team-num {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-data);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--about-accent);
}

.page-about .about-team-card--data .about-team-num {
  color: var(--about-data);
}

.page-about .about-team-card--service .about-team-num {
  color: var(--color-warning);
}

.page-about .about-team-title {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.page-about .about-team-desc {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .about-team-bottom {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-about .about-team-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-border);
  background: var(--color-bg-panel);
}

.page-about .about-team-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-about .about-team-culture {
  max-width: 620px;
}

.page-about .about-team-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-team-tags .tag {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--about-border);
  background: rgba(0, 201, 167, 0.08);
  color: var(--about-data);
  font-family: var(--font-data);
  font-size: 12px;
}

/* ===== 06 底部 CTA ===== */
.page-about .about-cta {
  padding: 48px 0 clamp(80px, 12vw, 140px);
  border-top: 1px solid var(--about-border);
}

.page-about .about-cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.page-about .about-cta-text {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(1.4rem, 2.6vw, 2.2rem);
  color: var(--color-text);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

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

  .page-about .about-who-grid {
    grid-template-columns: 1fr 1fr;
    gap: 52px;
  }

  .page-about .about-data-panel-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-team-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}

@media (min-width: 992px) {
  .page-about .container {
    padding-inline: 32px;
  }

  .page-about .about-hero-layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
  }

  .page-about .about-hero {
    padding-top: 48px;
  }

  .page-about .about-hero-lead {
    font-size: 18px;
  }

  .page-about .about-who {
    padding-top: 120px;
    padding-bottom: 120px;
  }

  .page-about .about-milestones {
    padding-top: 120px;
    padding-bottom: 120px;
  }

  .page-about .about-data {
    padding-top: 120px;
    padding-bottom: 120px;
  }

  .page-about .about-team {
    padding-top: 120px;
    padding-bottom: 120px;
  }

  .page-about .about-data-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
  }

  .page-about .about-team-bottom {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 64px;
  }

  .page-about .about-team-visual {
    order: 1;
  }

  .page-about .about-team-culture {
    order: 0;
  }

  .page-about .about-cta {
    padding-bottom: 120px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline-item {
    grid-template-columns: 1fr 48px 1fr;
    gap: 0;
    padding-bottom: 56px;
  }

  .page-about .about-timeline-item:nth-child(even) .about-timeline-meta {
    grid-column: 1;
    grid-row: 1;
    justify-self: end;
  }

  .page-about .about-timeline-item:nth-child(even) .about-timeline-card {
    grid-column: 3;
    grid-row: 1;
  }

  .page-about .about-timeline-item:nth-child(odd) .about-timeline-meta {
    grid-column: 3;
    grid-row: 1;
  }

  .page-about .about-timeline-item:nth-child(odd) .about-timeline-card {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-timeline-meta {
    align-self: start;
    padding-top: 6px;
  }

  .page-about .about-timeline-card:hover {
    transform: translateY(-4px);
  }

  .page-about .about-timeline-period {
    writing-mode: horizontal-tb;
    max-width: 90px;
  }
}

/* ===== 减少动画 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero-media img,
  .page-about .about-data-panel-media img,
  .page-about .about-team-visual img {
    animation: none !important;
  }

  .page-about .about-metric-card,
  .page-about .about-flow-step,
  .page-about .about-timeline-card,
  .page-about .about-team-card,
  .page-about .btn {
    transition: none !important;
    transform: none !important;
  }
}