/* BrandBase 统一Footer样式 */
.bb-footer {
  background: #1E40AF;
  color: white;
  padding: 48px 32px 24px;
  margin-top: 80px;
}

.bb-footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.bb-footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.bb-footer-logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

.bb-footer-logo-text {
  line-height: 1.15;
}

.bb-footer-logo-text .brand {
  font-size: 18px;
  font-weight: 700;
  color: #5B9CF6;
}

.bb-footer-logo-text .base {
  font-size: 18px;
  font-weight: 700;
  color: white;
}

.bb-footer-logo-text .sub {
  font-size: 10px;
  color: rgba(255,255,255,0.6);
}

.bb-footer-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
  max-width: 280px;
  margin-bottom: 12px;
}

.bb-footer-section h4 {
  font-size: 14px;
  font-weight: 600;
  color: white;
  margin-bottom: 16px;
}

.bb-footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bb-footer-section li {
  margin-bottom: 10px;
}

.bb-footer-section a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color 0.2s;
}

.bb-footer-section a:hover {
  color: white;
}

.bb-footer-bottom {
  max-width: 1280px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.bb-footer-icp {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

.bb-footer-hkibr {
  font-size: 11px;
  color: rgba(255,255,255,0.35);
  text-align: center;
  margin-top: 8px;
}

@media (max-width: 768px) {
  .bb-footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .bb-footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}