@layer legacy {
/* 存证上传与作品页共用展厅布局；底部工具栏固定，主内容始终保留操作空间。 */
.provenance-page #app { background: var(--bg); --page-gutter: 24px; }
.provenance-page main { padding-top: 0; padding-bottom: calc(104px + env(safe-area-inset-bottom)); }
.provenance-page .header { height: 44px; }
.provenance-eyebrow { font-size: 6px; letter-spacing: 3px; text-align: center; margin: 1px 0 22px; }
.provenance-title { font: 400 34px/1.28 Georgia, 'Noto Serif CJK TC', 'Songti TC', serif; letter-spacing: -.6px; }
.provenance-subtitle { font-size: 8px; line-height: 1.6; letter-spacing: 2px; margin-top: 8px; }
/* 作品图按自身比例完整缩放；画面上不叠加上传控件或文件名称。 */
.provenance-upload .provenance-eyebrow {
  padding-bottom: 13px; margin-bottom: 20px; border-bottom: 1px solid var(--accent);
}
.provenance-upload .provenance-title { font-size: 31px; line-height: 1.2; }
.provenance-drop {
  display: block; position: relative; margin: 4px -24px 0;
  height: clamp(230px, 74vw, 318px); cursor: pointer;
}
.upload-art, .upload-preview {
  display: block; position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: contain; object-position: center; background: var(--bg);
}
.upload-art {
  mask-image: linear-gradient(to bottom, transparent, #000 6%, #000 86%, transparent),
    linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
  mask-composite: intersect;
}
.provenance-drop input {
  position: absolute; width: 1px; height: 1px; opacity: 0; bottom: 50%; left: 50%;
}
.provenance-drop:focus-within { outline: 1px solid var(--accent); outline-offset: -8px; }
.upload-document {
  position: absolute; inset: 25px; display: flex; flex-direction: column; gap: 18px;
  align-items: center; justify-content: center; color: var(--accent-dark);
  border: 1px solid var(--line); font-size: 14px;
}
.upload-caption { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 3px; }
.upload-caption > span { font-size: 12px; color: var(--text); overflow-wrap: anywhere; min-width: 0; }
.upload-replace {
  padding: 8px 0; flex-shrink: 0; background: none; border: 0;
  color: var(--accent-dark); text-decoration: underline; text-underline-offset: 4px; font-size: 12px;
}
.upload-limits { margin-top: 4px; text-align: center; color: var(--muted); font-size: 11px; }
/* 人机验证组件仅在需要交互时出现，居中并与提交按钮留出间距。 */
.upload-turnstile { display: flex; justify-content: center; }
.upload-turnstile:not(:empty) { margin: 12px 0; }
.provenance-fields { margin-top: 12px; }
.provenance-name { border-bottom: 1px solid var(--text); }
.provenance-name label { display: block; font: 18px/1.3 Georgia, 'Noto Serif CJK TC', serif; }
.provenance-name label span { margin-left: 8px; color: var(--accent); }
.provenance-name input#asset-name {
  border: 0; border-radius: 0; background: transparent; padding: 8px 0 9px;
  width: 100%; min-height: 40px; color: var(--text); font-size: 16px;
  font-family: Georgia, 'Noto Serif CJK TC', serif;
}
.provenance-name:focus-within { border-bottom-color: var(--accent); }
.provenance-name input#asset-name:focus-visible { outline-offset: 2px; }
.provenance-description { margin: 4px 0 0; border-bottom: 1px solid var(--line); }
.provenance-description summary {
  display: flex; align-items: center; gap: 10px; min-height: 41px;
  font: 15px Georgia, 'Noto Serif CJK TC', serif; cursor: pointer; list-style: none;
}
.provenance-description summary::-webkit-details-marker { display: none; }
.provenance-description small { font: 11px sans-serif; color: var(--muted); }
.provenance-description summary .icon { margin-left: auto; color: var(--accent-dark); transform: rotate(45deg); }
.provenance-description[open] summary .icon { transform: none; }
.provenance-description textarea#asset-desc {
  width: 100%; margin: 0 0 10px; background: transparent; color: var(--text);
  border: 0; border-radius: 0; padding: 8px 0; font-size: 16px;
}
.provenance-steps {
  display: flex; padding: 0; margin: 12px 0 14px; list-style: none; gap: 14px; text-align: center;
}
.provenance-steps li {
  flex: 1; min-width: 0; position: relative; display: flex;
  flex-direction: column; align-items: center; gap: 3px; color: var(--muted);
}
.provenance-steps li:not(:last-child)::after {
  content: ''; position: absolute; top: 11px; left: calc(50% + 19px);
  width: calc(100% - 24px); height: 1px; background: var(--border);
}
.provenance-steps li > span { font: 19px Georgia, serif; }
.provenance-steps strong { font: 16px Georgia, 'Noto Serif CJK TC', serif; }
.provenance-steps .is-active { color: var(--accent-dark); }
.provenance-primary {
  display: flex; justify-content: center; align-items: center; gap: 14px;
  width: 100%; min-height: 49px; padding: 11px 16px; border: 0; border-radius: 99px;
  background: var(--accent-fill); color: var(--on-accent);
  font: 22px/1.3 Georgia, 'Noto Serif CJK TC', serif;
}
.provenance-primary:hover { background: var(--accent-fill-hover); }
.provenance-primary:disabled { opacity: .65; cursor: wait; }
.provenance-note { text-align: center; font-size: 10px; margin: 10px 0 0; }
.provenance-ai-note { text-align: center; font-size: 9px; margin-top: 8px; color: var(--muted); }
.provenance-collection-heading { display: flex; gap: 10px; align-items: center; margin-top: 18px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.provenance-collection-heading h2 { font: 19px Georgia, 'Noto Serif CJK TC', serif; }
.provenance-collection-heading small { color: var(--muted); font-size: 11px; }
.provenance-collection-heading button { margin-left: auto; }
.provenance-search { display: block; margin-top: 10px; font-size: 12px; }
.provenance-search input { width: 100%; background: var(--surface); color: var(--text); padding: 8px;
  border: 1px solid var(--border); border-radius: 6px; }
.collection-stage { height: 310px; position: relative; margin-inline: -24px; }
.collection-stage > img { width: 100%; height: 100%; object-fit: cover; object-position: center 65%; }
.collection-arrow { position: absolute; top: 48%; display: grid; place-items: center; width: 36px; height: 44px;
  border: 1px solid var(--border); color: var(--text); border-radius: 50%; background: color-mix(in srgb, var(--bg) 79%, transparent); }
.collection-arrow.previous { left: 25px; }
.collection-arrow.previous .icon { transform: rotate(180deg); }
.collection-arrow.next { right: 25px; }
.collection-index { position: absolute; bottom: 8px; left: 50%; transform: translateX(-50%);
  background: color-mix(in srgb, var(--bg) 68%, transparent); padding: 2px 12px; font: 14px Georgia, serif; }
.collection-caption { display: flex; justify-content: center; align-items: center; gap: 12px; margin-top: 8px; }
.collection-caption h2 { font: 27px/1.4 Georgia, 'Noto Serif CJK TC', serif; overflow-wrap: anywhere; }
.collection-caption > span { flex-shrink: 0; border: 1px solid var(--border); color: var(--accent-hover);
  border-radius: 99px; padding: 3px 8px; font-size: 11px; }
.collection-recorded { text-align: center; font-size: 11px; margin-top: 4px; }
.collection-metadata { display: grid; grid-template-columns: 1fr 1fr; margin: 12px 0 10px;
  padding-top: 10px; border-top: 1px solid var(--muted); }
.collection-metadata > div + div { border-left: 1px solid var(--border); padding-left: 18px; }
.collection-metadata dt { font-size: 11px; color: var(--muted); }
.collection-metadata dd { margin: 0; font-size: 13px; display: flex; align-items: center; }
.collection-metadata .icon-button { width: 30px; height: 30px; min-width: 30px; }
.collection-thumbnails { display: flex; gap: 10px; overflow-x: auto; margin-top: 14px; padding: 0 1px 5px; }
.collection-thumbnails button { width: calc((100% - 20px) / 3); flex-shrink: 0; border: 0; padding: 0;
  background: none; color: var(--text); font: 12px Georgia, 'Noto Serif CJK TC', serif; }
.collection-thumbnails img { display: block; width: 100%; height: 75px; object-fit: cover;
  border: 1px solid var(--soft-line); border-radius: 8px; margin-bottom: 5px; }
.collection-thumbnails span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.collection-thumbnails [aria-pressed="true"] img { border: 2px solid var(--accent-hover); }
.collection-thumbnails [aria-pressed="true"] { color: var(--accent-hover); }
.provenance-empty { min-height: 340px; display: grid; place-content: center; justify-items: center; gap: 15px; }
.provenance-page [hidden] { display: none !important; }
@media (max-width: 360px) {
  .provenance-title, .provenance-upload .provenance-title { font-size: 29px; }
  .provenance-collection-heading h2 { font-size: 16px; }
  .provenance-steps strong { font-size: 15px; }
}
html:not([lang="zh-Hant"]) .provenance-title { font-size: 30px; }
html:not([lang="zh-Hant"]) .provenance-upload .provenance-title { font-size: 30px; }
html:not([lang="zh-Hant"]) .provenance-steps strong { font-size: 14px; }

}