/* ---- 公共返回按钮组件 ---- */
.nav-back-top {
  margin-bottom: 24px;
}
.nav-back-bottom {
  margin-top: 48px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border: 1.5px solid rgba(255,255,255,0.25);
  border-radius: 8px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.06);
}
.back-link:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}