/* =====================================================
   到可到对货 官网 - 关于我们页样式
   ===================================================== */

.about-hero { background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 60%, #F8FAFC 100%); }

/* ─── 品牌故事 ─── */
.about-story-block {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
}

.about-story-content h2 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.5px;
}

.about-story-content p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.9;
  margin-bottom: var(--spacing-lg);
}

.about-story-content p strong { color: var(--color-primary); }

.about-logo-card {
  background: #fff;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  padding: var(--spacing-2xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  width: 260px;
}

.about-logo-big {
  width: 140px;
  height: 140px;
  margin-bottom: var(--spacing-lg);
}

.about-logo-tagline {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.about-logo-sub {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ─── 核心价值 ─── */
.about-values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.about-value-card {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.about-value-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.about-value-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto var(--spacing-md);
}

.about-value-card h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.about-value-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.85;
}

/* ─── 时间轴 ─── */
.about-timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}

.about-timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.about-timeline-item {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
  position: relative;
}

.about-timeline-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--color-border);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: all var(--transition-normal);
}

.about-timeline-dot.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-bg);
}

.about-timeline-item:hover .about-timeline-dot {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.about-timeline-date {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.about-timeline-content h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.about-timeline-content p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.85;
}

/* ─── 版本能力边界 ─── */
.about-boundary-wrap {
  max-width: 980px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.about-boundary-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}

.about-boundary-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: 10px;
}

.about-boundary-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ─── 联系我们 ─── */
.about-contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.about-contact-card {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.about-contact-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.about-contact-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto var(--spacing-md);
}

.about-contact-card h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.about-contact-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.about-contact-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.about-contact-qr img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  margin: 8px auto;
  display: block;
}

/* ─── 动画 ─── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.animate-on-scroll.visible { opacity: 1; transform: none; }

/* ─── 响应式 ─── */
@media (max-width: 1024px) {
  .about-story-block { grid-template-columns: 1fr; gap: 32px; }
  .about-logo-card { width: 100%; max-width: 300px; margin: 0 auto; }
  .about-values-grid { grid-template-columns: repeat(2, 1fr); }
  .about-contact-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .about-values-grid { grid-template-columns: 1fr; }
  .about-contact-grid { grid-template-columns: 1fr; }
  .about-boundary-wrap { grid-template-columns: 1fr; }
  .about-story-content h2 { font-size: var(--font-size-2xl); }
}