/* ═══════════════════════════════════════════════
   关于我们页面样式
   ═══════════════════════════════════════════════ */

.about-content {
  padding: 80px 0 120px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-visual {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.about-visual::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, var(--accent), transparent, var(--accent-2), transparent);
  animation: spin 8s linear infinite;
  opacity: 0.15;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.about-visual .icon-big {
  font-size: 100px;
  position: relative;
  z-index: 1;
  filter: grayscale(0.2);
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.stat-card {
  padding: 20px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.stat-card .num {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-card .label {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ── Timeline Section ── */
.timeline-section {
  padding: 80px 0;
}

.timeline {
  max-width: 720px;
  margin: 48px auto 0;
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2));
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.8;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .about-visual {
    max-width: 320px;
    margin: 0 auto;
  }
}