/* ==============================================
   6686官方版 | 公司档案页专属样式
   作用域：.page-about
   ============================================== */
.page-about {
  --page-about-grid: rgba(0, 85, 255, 0.05);
  --page-about-line: rgba(0, 85, 255, 0.18);
  --page-about-soft: #EFF5FF;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about [hidden] {
  display: none !important;
}

/* ---------- 品牌定位 / Hero ---------- */
.page-about__hero {
  position: relative;
  overflow: hidden;
  padding-top: var(--space-5);
  padding-bottom: var(--space-7);
}

.page-about__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--page-about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--page-about-grid) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.page-about__hero .site-container {
  position: relative;
  z-index: 1;
}

.page-about__file-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0 var(--space-5);
}

.page-about__file-tab {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  line-height: 1.2;
  padding: 7px 16px;
  border-radius: 10px 10px 0 0;
  box-shadow: var(--shadow-sm);
}

.page-about__file-tab--light {
  background: var(--color-deep);
}

.page-about__file-tab--accent {
  background: var(--color-accent);
}

.page-about__hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  align-items: center;
}

.page-about__hero-copy {
  max-width: 720px;
}

.page-about__hero-copy h1 {
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.15;
  margin: var(--space-2) 0 var(--space-4);
  letter-spacing: -0.02em;
}

.page-about__hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ink);
  margin-bottom: var(--space-6);
}

.page-about__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0 0 var(--space-6);
  padding: 0;
  list-style: none;
}

.page-about__stat {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.page-about__stat dt {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: var(--space-1);
}

.page-about__stat dd {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  color: var(--color-ink);
  margin: 0;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-about__hero-figure {
  position: relative;
  margin: var(--space-4) 0 0;
}

.page-about__tape {
  position: absolute;
  top: -12px;
  left: 28px;
  z-index: 2;
  width: 120px;
  height: 26px;
  background: rgba(255, 204, 0, 0.55);
  transform: rotate(-6deg);
  box-shadow: 0 2px 6px rgba(26, 26, 46, 0.1);
  border-left: 2px solid rgba(255, 255, 255, 0.35);
  border-right: 2px solid rgba(255, 255, 255, 0.35);
  pointer-events: none;
}

.page-about__hero-img {
  display: block;
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

/* ---------- 章节标题通用 ---------- */
.page-about__section-head {
  max-width: 680px;
  margin-bottom: var(--space-6);
}

.page-about__section-head h2 {
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.2;
  margin: var(--space-2) 0 var(--space-3);
}

.page-about__section-head p {
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

/* ---------- 发展历程 ---------- */
.page-about__timeline-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.page-about__timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}

.page-about__timeline-nav {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-left: var(--space-6);
  border-left: 2px solid var(--page-about-line);
}

.page-about__timeline-nav::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 40px;
  bottom: 40px;
  width: 2px;
  background: linear-gradient(to bottom, #D9E2EC 0%, #7FA8E8 40%, #0055FF 75%, #003399 100%);
  z-index: 0;
}

.page-about__milestone {
  position: relative;
  z-index: 1;
  appearance: none;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.page-about__milestone:hover,
.page-about__milestone:focus-visible {
  background: rgba(0, 85, 255, 0.07);
  outline: none;
  transform: translateX(4px);
}

.page-about__milestone-dot {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 2px rgba(0, 85, 255, 0.2);
  background: #D9E2EC;
}

.page-about__milestone:nth-child(1) .page-about__milestone-dot {
  background: #D9E2EC;
}

.page-about__milestone:nth-child(2) .page-about__milestone-dot {
  background: #7FA8E8;
}

.page-about__milestone:nth-child(3) .page-about__milestone-dot {
  background: var(--color-primary);
}

.page-about__milestone:nth-child(4) .page-about__milestone-dot {
  background: var(--color-deep);
}

.page-about__milestone-version {
  font-weight: 700;
  font-size: 16px;
  color: var(--color-ink);
  min-width: 44px;
}

.page-about__milestone-title {
  font-size: 14px;
  color: var(--color-muted);
}

.page-about__timeline-detail {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.page-about__milestone-panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.page-about__milestone-panel h3 {
  font-size: 22px;
  margin: var(--space-3) 0 var(--space-2);
}

.page-about__milestone-panel p {
  line-height: 1.7;
  color: var(--color-ink);
  margin-bottom: var(--space-4);
}

.page-about__milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-about__milestone-list li {
  background: var(--page-about-soft);
  color: var(--color-deep);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

.page-about__timeline-figure {
  margin: 0 0 var(--space-4);
}

.page-about__timeline-img {
  display: block;
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  object-fit: cover;
}

.page-about__timeline-note {
  font-size: 14px;
  color: var(--color-muted);
  margin: var(--space-3) 0 0;
}

.page-about__timeline-note a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration-thickness: 2px;
}

/* ---------- 团队与组织 ---------- */
.page-about__team-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.page-about__team-card {
  padding: var(--space-5);
  border-top: 4px solid var(--color-primary);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about__team-card:nth-child(2) {
  border-top-color: var(--color-deep);
}

.page-about__team-card:nth-child(3) {
  border-top-color: var(--color-accent);
}

.page-about__team-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.page-about__team-icon {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 28px;
  line-height: 1;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  opacity: 0.85;
}

.page-about__team-card h3 {
  font-size: 20px;
  margin: 0 0 var(--space-3);
}

.page-about__team-card p {
  line-height: 1.7;
  color: var(--color-muted);
  margin: 0;
  font-size: 15px;
}

/* ---------- 资质与备案 ---------- */
.page-about__compliance-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.page-about__compliance-grid {
  align-items: center;
}

.page-about__compliance-copy h2 {
  font-size: clamp(24px, 4vw, 32px);
  margin: var(--space-2) 0 var(--space-3);
}

.page-about__compliance-copy > p {
  line-height: 1.7;
  color: var(--color-ink);
}

.page-about__compliance-note {
  margin-top: var(--space-5);
  border-left: 4px solid var(--color-success);
}

.page-about__compliance-note p {
  font-size: 14px;
  line-height: 1.6;
  margin: var(--space-2) 0;
}

.page-about__compliance-note strong {
  color: var(--color-ink);
}

.page-about__compliance-figure {
  margin: var(--space-5) 0 0;
  position: relative;
}

.page-about__compliance-img {
  display: block;
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  object-fit: cover;
}

/* ---------- 荣誉与认可 ---------- */
.page-about__awards-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.page-about__awards-grid {
  gap: var(--space-5);
}

.page-about__award-card {
  perspective: 1200px;
  cursor: default;
  min-height: 320px;
}

.page-about__award-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  transition: transform 0.55s ease;
  transform-style: preserve-3d;
}

.page-about__award-face {
  grid-area: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about__award-face--back {
  transform: rotateY(180deg);
  background: var(--color-deep);
  color: var(--color-white);
  border-color: var(--color-deep);
  justify-content: center;
}

.page-about__award-card:hover .page-about__award-inner,
.page-about__award-card:focus-within .page-about__award-inner {
  transform: rotateY(180deg);
}

.page-about__award-icon {
  width: 64px;
  height: 64px;
  flex: 0 0 auto;
}

.page-about__award-face h3 {
  font-size: 22px;
  margin: var(--space-2) 0 0;
  color: var(--color-ink);
}

.page-about__award-face--back h4 {
  font-size: 20px;
  margin: 0 0 var(--space-3);
}

.page-about__award-face--back p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
  margin: 0 0 var(--space-4);
}

.page-about__award-brief {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-muted);
  margin: 0;
}

.page-about__award-year {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-warning);
  background: rgba(255, 255, 255, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}

/* ---------- 合作生态 ---------- */
.page-about__partners-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.page-about__partners-list {
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.page-about__partners-list li {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-about__partners-num {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  color: var(--color-primary);
}

.page-about__partners-label {
  font-size: 14px;
  color: var(--color-muted);
}

.page-about__partners-note {
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 680px;
  margin: 0;
}

/* ---------- 更多入口 CTA ---------- */
.page-about__cta-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-8);
}

.page-about__cta-card {
  padding: var(--space-6);
  text-align: center;
  background-image: linear-gradient(135deg, var(--page-about-soft), var(--color-white));
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
}

.page-about__cta-card h2 {
  font-size: clamp(24px, 4vw, 30px);
  margin: var(--space-2) 0 var(--space-3);
}

.page-about__cta-card p {
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto var(--space-5);
}

.page-about__cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 760px) {
  .page-about__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about__hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
    gap: var(--space-7);
  }

  .page-about__hero-figure {
    margin-top: 0;
  }

  .page-about__partners-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about__cta-card {
    padding: var(--space-7);
  }
}

@media (min-width: 980px) {
  .page-about__timeline {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: var(--space-7);
    align-items: start;
  }

  .page-about__timeline-nav {
    position: sticky;
    top: 24px;
  }

  .page-about__compliance-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: var(--space-7);
  }

  .page-about__compliance-figure {
    margin-top: 0;
  }

  .page-about__awards-grid {
    gap: var(--space-6);
  }
}

/* ---------- 减弱动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about__award-inner,
  .page-about__milestone,
  .page-about__team-card {
    transition: none;
  }

  .page-about__milestone:hover,
  .page-about__milestone:focus-visible {
    transform: none;
  }

  .page-about__team-card:hover {
    transform: none;
  }
}