/* ===== 3D 模型查看器 - 全屏弹窗 ===== */
.modal-3d-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: rgba(10,10,15,0.92);
  display: none;
  opacity: 0;
  transition: opacity 0.35s ease;
  cursor: default;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.modal-3d-overlay.active {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
}
.modal-3d-overlay .modal-3d-bg-close {
  position: absolute;
  inset: 0;
  z-index: 1;
  cursor: default;
}
#canvas-container-3d {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  display: block;
}
.modal-3d-btn-close {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 10;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.modal-3d-btn-close:hover {
  background: rgba(255,255,255,0.25);
  transform: scale(1.08);
}
.modal-3d-btn-close:active {
  transform: scale(0.94);
}
.modal-3d-tip {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  color: rgba(255,255,255,0.55);
  font-size: 13px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  letter-spacing: 0.3px;
  pointer-events: none;
  user-select: none;
  text-align: center;
  background: rgba(0,0,0,0.35);
  padding: 7px 18px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  white-space: nowrap;
}
.modal-3d-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  color: rgba(255,255,255,0.4);
  font-family: system-ui, sans-serif;
  font-size: 15px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  pointer-events: none;
}
.modal-3d-loading .spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: #fff;
  border-radius: 50%;
  animation: modal3dSpin 0.8s linear infinite;
}
@keyframes modal3dSpin {
  to { transform: rotate(360deg); }
}

/* ===== 3D 触发按钮（详情页） ===== */
.btn-3d-view {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border: 2px solid var(--green, #2e7d32);
  background: transparent;
  color: var(--green, #2e7d32);
  font-size: 15px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.btn-3d-view:hover {
  background: var(--green, #2e7d32);
  color: #fff;
}
.btn-3d-view i, .btn-3d-view svg {
  font-size: 18px;
}

/* 响应式 */
@media(max-width:600px) {
  .modal-3d-btn-close {
    top: 12px;
    right: 12px;
    width: 38px;
    height: 38px;
    font-size: 22px;
  }
  .modal-3d-tip {
    font-size: 11px;
    padding: 5px 12px;
    bottom: 16px;
    white-space: normal;
  }
}

/* ===== 3D 缩略图（产品图��） ===== */
.gallery-thumb-3d {
  position: relative;
  cursor: pointer;
}
.gallery-thumb-3d:hover {
  border-color: var(--green, #2e7d32);
}
.model3d-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 3px 7px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  font-family: system-ui, -apple-system, sans-serif;
  pointer-events: none;
  user-select: none;
  border: 1.5px solid rgba(255,255,255,0.2);
}
.gallery-thumb-3d:hover .model3d-badge {
  background: var(--green, #2e7d32);
  border-color: var(--green, #2e7d32);
}