/* 图片 Base64 */
.b64-result { margin-top: 14px; }
.b64-preview {
  border: 1px solid var(--line, #e6e8ef);
  border-radius: 12px;
  background: var(--panel-2, #f7f9fc);
  padding: 12px;
  text-align: center;
  margin-bottom: 12px;
  max-height: 360px;
  overflow: auto;
}
.b64-preview img {
  max-width: 100%;
  max-height: 320px;
  border-radius: 6px;
  display: inline-block;
}
.b64-result .acts { display: flex; gap: 8px; flex-wrap: wrap; }
#toOut, #fromIn { width: 100%; resize: vertical; }