:root {
  --paper: #fff;
  --panel: #fff;
  --panel-strong: #fff;
  --ink: #1a1a1a;
  --muted: #888;
  --line: #ddd;
  --line-strong: #aaa;
  --signal: #222;
  --signal-deep: #555;
  --focus: #222;
  --danger: #8b2e2e;
  --shadow: none;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { background: var(--paper); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.55;
}
body.modal-open { overflow: hidden; }

button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible, a:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
a { color: inherit; }
[hidden] { display: none !important; }

.masthead {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  padding: 14px 36px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(16px);
}

.brand { display: flex; align-items: center; text-decoration: none; }
.brand-logo { display: block; width: 192px; height: auto; filter: grayscale(1) brightness(.65); opacity: .8; }
.masthead-meta { display: flex; align-items: center; gap: 26px; color: #888; font-size: 11px; letter-spacing: .25em; }
.user-state { max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.page-shell { width: min(1500px, calc(100% - 72px)); margin: 0 auto; padding: 24px 0 72px; }
.questionnaire-step .lab-layout { grid-template-columns: 1fr; max-width: 900px; margin: 0 auto; }
.questionnaire-step .workspace { display: none; }
.questionnaire-step .source-panel { position: static; max-height: none; overflow: visible; }
.questionnaire-step .source-body { max-height: none; overflow: visible; }
.questionnaire-step #questionnaire-form ~ .answer-list .button-row { display: none; }
.questionnaire-next { margin-top: 18px; width: 100%; }
.usage-line { display: flex; gap: 16px; margin: 0 0 42px; padding: 0 0 14px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; letter-spacing: .04em; }
.usage-line strong { flex-shrink: 0; color: var(--ink); font-weight: 500; letter-spacing: .18em; }
.intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); align-items: start; gap: 36px; margin-bottom: 24px; }
.eyebrow { margin: 0 0 10px; color: var(--muted); font-size: 10px; font-weight: 400; letter-spacing: .28em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(36px, 4.5vw, 62px); font-weight: 300; letter-spacing: -.045em; line-height: 1.04; }
.intro-copy { justify-self: end; width: 100%; min-width: 0; text-align: right; color: var(--muted); font-size: 12px; }
.intro-copy p { margin: 0; text-wrap: pretty; }
.intro-copy p + p { margin-top: 1em; }
@supports (text-wrap: balance) {
  .intro h1 { text-wrap: balance; }
}
.masthead-meta { flex-wrap: wrap; justify-content: flex-end; }
.masthead-meta a, .masthead-meta button { color: inherit; font: inherit; text-decoration: none; background: none; border: 0; padding: 4px 0; cursor: pointer; }
.masthead-meta a, .masthead-meta button { letter-spacing: inherit; white-space: nowrap; transition: color .25s; }
.masthead-meta a:hover, .masthead-meta button:hover { color: #222; }
.masthead-meta > [hidden] { display: none; }
.masthead-meta > :not([hidden]) ~ :not([hidden])::before { content: ""; display: inline-block; width: 1px; height: 10px; background: #ddd; margin-right: 26px; vertical-align: -1px; }
@media (max-width: 640px) {
  .masthead-meta { gap: 10px; letter-spacing: .08em; }
  .masthead-meta > :not([hidden]) ~ :not([hidden])::before { margin-right: 10px; }
}
.sample-badge { display: inline-flex; margin-top: 10px !important; padding: 6px 9px; border: 1px solid var(--line-strong); color: #555; background: #f5f5f5; font-weight: 500; }

.lab-layout { display: grid; grid-template-columns: minmax(250px, 300px) minmax(0, 1fr); gap: 16px; align-items: start; }
.workspace { display: grid; min-width: 0; gap: 16px; }
.panel { overflow: hidden; border: 1px solid var(--line); background: var(--panel); box-shadow: var(--shadow); }
.panel-header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 18px 20px 14px; border-bottom: 1px solid var(--line); }
.panel-kicker { color: var(--muted); font-size: 10px; font-weight: 400; letter-spacing: .18em; text-transform: uppercase; }
.panel-header h2 { margin: 0; font-size: 14px; font-weight: 500; }
.panel-count { color: var(--muted); font-size: 11px; }

.source-panel { position: sticky; top: 88px; max-height: calc(100vh - 106px); overflow-y: auto; }
.source-body { display: grid; gap: 16px; padding: 18px 20px 20px; }
.source-status { display: grid; gap: 5px; padding: 12px; border: 1px dashed var(--line-strong); background: #fafafa; }
.source-status strong { font-size: 13px; }
.source-status span { color: var(--muted); font-size: 11px; }
.answer-list { display: grid; gap: 14px; margin: 0; }
.source-body .field small,
.source-body .answer-list > p { margin: 0; color: var(--muted); font-size: 11px; font-weight: 400; line-height: 1.7; }
.answer-row { display: grid; gap: 3px; margin: 0; }
.answer-row dt { color: var(--muted); font-size: 10px; letter-spacing: .08em; }
.answer-row dd { display: -webkit-box; overflow: hidden; margin: 0; font-size: 12px; -webkit-box-orient: vertical; -webkit-line-clamp: 5; }
.answer-row textarea,
.source-body textarea,
.source-body input[type="text"] { width: 100%; min-height: 72px; resize: vertical; padding: 9px 10px; border: 1px solid var(--line); border-radius: 0; outline: 0; color: var(--ink); background: #fff; font-size: 12px; font-weight: 400; line-height: 1.55; }
.source-body input[type="text"] { min-height: 38px; }
.answer-row textarea:focus,
.source-body textarea:focus,
.source-body input[type="text"]:focus { border-color: var(--ink); box-shadow: 0 0 0 1px var(--ink); }
.empty-state { display: grid; gap: 14px; color: var(--muted); font-size: 12px; }
.empty-state p { margin: 0; }
.action-link { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 0 14px; border: 1px solid var(--ink); text-decoration: none; font-size: 12px; }
.action-link:hover { color: var(--panel-strong); background: var(--ink); }
.action-link[href="/investigator-input.html"] { display: none; }
.loading { color: var(--muted); font-size: 12px; }

.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 18px 20px 20px; }
.field { display: grid; min-width: 0; gap: 7px; color: var(--ink); font-size: 12px; font-weight: 700; }
.field-wide { grid-column: 1 / -1; }
.field input, .field textarea { width: 100%; resize: vertical; padding: 11px 12px; border: 1px solid var(--line); border-radius: 0; outline: 0; color: var(--ink); background: #fff; font-size: 12px; font-weight: 400; line-height: 1.55; }
.field input:focus, .field textarea:focus { border-color: var(--ink); box-shadow: 0 0 0 1px var(--ink); }
.field input:disabled, .field textarea:disabled { opacity: .62; cursor: not-allowed; }

.view-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 16px 20px 0; }
.view-tab { display: grid; gap: 2px; min-height: 62px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 0; color: var(--ink); background: #fff; text-align: left; }
.view-tab span { color: var(--muted); font-size: 10px; }
.view-tab.is-active { border-color: var(--ink); color: var(--panel-strong); background: var(--ink); }
.view-tab.is-active span { color: rgba(255,255,255,.65); }
.view-tab.has-image::after { color: var(--muted); content: "已有图片"; font-size: 9px; }
.view-tab.is-active.has-image::after { color: #ddd; }
.view-tab:disabled { cursor: not-allowed; opacity: .6; }
.view-detail-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 12px; padding: 14px 20px; }
.view-detail-field { min-width: 0; }
.prompt-summary { margin: 0 20px 18px; padding: 10px 12px; border: 1px solid var(--line); color: var(--muted); background: #fafafa; font-size: 11px; }
.prompt-summary summary { cursor: pointer; color: var(--ink); font-weight: 700; }
.prompt-summary p { margin: 9px 0 0; white-space: pre-line; }

.stage-wrap { display: grid; padding: 20px; place-items: center; background: #1a1a1a; }
.stage { position: relative; width: min(100%, 1080px); aspect-ratio: 16 / 9; overflow: hidden; border: 1px solid #555; background: #111; box-shadow: 0 24px 60px rgba(0,0,0,.2); }
.generated-image { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: contain; background: #111; }
.stage-empty { position: absolute; inset: 0; display: grid; align-content: center; justify-items: center; gap: 9px; padding: 24px; color: rgba(255,255,255,.55); text-align: center; }
.stage-empty::before { position: absolute; inset: 0; background: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px) 0 0 / 42px 42px, linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px) 0 0 / 42px 42px; content: ""; }
.stage-empty strong, .stage-empty span { position: relative; }
.stage-empty strong { color: rgba(255,255,255,.9); font-size: 22px; font-weight: 300; letter-spacing: .04em; }
.stage-empty span { max-width: 310px; font-size: 11px; }
.selection-layer { position: absolute; z-index: 4; inset: 0; cursor: crosshair; touch-action: none; user-select: none; }
.selection-rect { position: absolute; border: 2px solid #fff; background: rgba(255,255,255,.14); box-shadow: 0 0 0 1px rgba(0,0,0,.8), 0 0 0 9999px rgba(0,0,0,.16); pointer-events: none; }
.comparison-label, .busy-label { position: absolute; z-index: 7; top: 12px; left: 12px; padding: 6px 9px; border: 1px solid rgba(255,255,255,.35); color: #fff; background: rgba(13,20,18,.75); font-size: 10px; font-weight: 700; letter-spacing: .08em; }
.busy-label { right: 12px; left: auto; color: #fff; }
.preview-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 20px 17px; }
.preview-footer p { margin: 0; color: var(--muted); font-size: 11px; }
.version-history { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 9px; }
.version-button { min-width: 30px; min-height: 28px; padding: 0 8px; border: 1px solid var(--line); border-radius: 0; color: var(--muted); background: transparent; font-size: 10px; }
.version-button.is-current { border-color: var(--ink); color: var(--panel-strong); background: var(--ink); }

.button-row, .edit-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.button { min-height: 38px; padding: 0 15px; border: 1px solid var(--line-strong); border-radius: 0; color: var(--ink); background: transparent; font-size: 12px; }
.button:hover:not(:disabled) { border-color: var(--ink); transform: translateY(-1px); }
.button:disabled { cursor: not-allowed; opacity: .42; }
.button.primary { border-color: var(--ink); color: var(--panel-strong); background: var(--ink); }
.button.signal { border-color: var(--ink); color: #fff; background: var(--ink); }
.edit-body { display: grid; gap: 14px; padding: 16px 20px 20px; }
.edit-help { margin: 0; color: var(--muted); font-size: 11px; }
.notice { min-height: 18px; margin: 0; color: var(--muted); font-size: 11px; }
.notice.error { color: var(--danger); }
.notice.success { color: #555; }
.is-stale { color: #91641c; }

.artwork-form { display: grid; }
.artwork-fields { padding-bottom: 14px; }
.artwork-form-footer { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 10px 18px; padding: 0 20px 20px; }
.upload-disclosure { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.7; }
.artwork-form-footer .notice { grid-column: 1 / -1; }

.artwork-modal { position: fixed; z-index: 100; inset: 0; display: grid; overflow-y: auto; padding: 32px; background: rgba(255, 255, 255, .82); backdrop-filter: blur(12px); place-items: center; }
.artwork-dialog { width: min(980px, 100%); max-height: calc(100vh - 64px); overflow-y: auto; padding: clamp(22px, 4vw, 44px); border: 1px solid #8a8a8a; border-radius: 18px; outline: 0; background: #fff; box-shadow: 0 18px 60px rgba(0, 0, 0, .08); }
.artwork-dialog { box-sizing: border-box; max-height: calc(100dvh - 64px); overflow-y: scroll; scrollbar-gutter: stable; overscroll-behavior: contain; }
.review-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 24px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.review-heading .panel-kicker { margin: 0 0 6px; }
.review-heading h2 { margin: 0; font-size: clamp(24px, 3vw, 38px); font-weight: 300; letter-spacing: -.035em; }
.review-snapshot-label { margin: 0; color: var(--muted); font-size: 10px; letter-spacing: .16em; }
.review-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(240px, .75fr); gap: clamp(22px, 4vw, 44px); align-items: start; }
.review-figure { min-width: 0; align-self: start; margin: 0; }
.review-figure img { display: block; width: 100%; height: 100%; object-fit: contain; }
.review-figure img[hidden] { display: none; }
#review-view-gallery figure { border: 1px solid var(--line); }
#review-view-gallery figcaption { padding: 8px 12px; font-size: 12px; }
.review-copy { min-width: 0; }
.review-author { margin: 0 0 22px; color: #777; font-size: 11px; letter-spacing: .2em; overflow-wrap: anywhere; }
.review-copy h3 { margin: 0 0 18px; color: #222; font-size: clamp(22px, 2.6vw, 34px); font-weight: 300; letter-spacing: -.03em; line-height: 1.2; overflow-wrap: anywhere; }
.review-description { max-height: 280px; overflow-y: auto; margin: 0; color: #666; font-size: 13px; line-height: 1.9; white-space: pre-wrap; overflow-wrap: anywhere; }
.review-disclosure { margin: 26px 0 0; padding: 14px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: #666; font-size: 11px; line-height: 1.75; }
.readiness-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 16px; }
.readiness-row .notice { flex: 1; }
.review-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition-duration: .01ms !important; } }
@media (max-width: 980px) {
  .page-shell input, .page-shell textarea, .page-shell select {
    font-size: 16px !important;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
  }
  .lab-layout > *, .workspace, .field, .planning-grid > * { min-width: 0; }
  .page-shell { width: min(100% - 24px, 760px); padding-top: 28px; }
  .intro { grid-template-columns: 1fr; gap: 12px; }
  .lab-layout { grid-template-columns: 1fr; }
  .source-panel { position: static; max-height: none; }
}
@media (max-width: 620px) {
  .masthead { min-height: 52px; padding: calc(14px + env(safe-area-inset-top)) 14px 14px; }
  .brand-logo { width: 104px; }
  .user-state { max-width: 150px; }
  .page-shell { width: min(100% - 16px, 560px); padding: 22px 0 40px; }
  .usage-line { gap: 7px; margin-bottom: 28px; white-space: normal; }
  h1 { font-size: 42px; }
  .panel-header, .source-body, .field-grid, .edit-body { padding-left: 14px; padding-right: 14px; }
  .field-grid { grid-template-columns: 1fr; }
  .field-wide { grid-column: auto; }
  .view-tabs { grid-template-columns: 1fr; padding-right: 14px; padding-left: 14px; }
  .view-tab { min-height: 54px; }
  .view-detail-row { grid-template-columns: 1fr; padding-right: 14px; padding-left: 14px; }
  .view-detail-row .button { width: 100%; }
  .prompt-summary { margin-right: 14px; margin-left: 14px; }
  .stage-wrap { padding: 10px; }
  .preview-footer { align-items: stretch; flex-direction: column; padding-right: 14px; padding-left: 14px; }
  .preview-footer .button-row { display: grid; grid-template-columns: 1fr 1fr; }
  .preview-footer .button:last-child { grid-column: 1 / -1; }
  .artwork-form-footer { grid-template-columns: 1fr; padding-right: 14px; padding-left: 14px; }
  .artwork-form-footer .button { width: 100%; }
  .artwork-form-footer .notice { grid-column: auto; }
  .artwork-modal { align-items: start; padding: 8px; }
  .artwork-dialog { max-height: calc(100vh - 16px); padding: 22px 18px; border-radius: 12px; }
  .review-heading { align-items: start; flex-direction: column; gap: 8px; }
  .review-grid { grid-template-columns: 1fr; gap: 22px; }
  .review-description { max-height: none; }
  .readiness-row { align-items: stretch; flex-direction: column; }
  .review-actions { display: grid; grid-template-columns: 1fr; }
}
.review-grid { box-sizing: border-box; display: flex; flex-direction: column; width: min(100%, 432px); aspect-ratio: 9 / 16; margin: 0 auto 24px; padding: 40px 18px 20px; gap: 2.2vh; border: 1px solid #8a8a8a; border-radius: 18px; overflow: hidden; }
.review-note-head { display: flex; align-items: center; gap: 18px; flex-shrink: 0; }
.review-avatar { width: 72px; height: 72px; flex: none; border: 1px solid #c5c5c5; border-radius: 4px; opacity: .6; }
.review-note-head .review-author { margin: 0; font-size: 18px; letter-spacing: .2em; color: #222; }
.review-note-head #review-work-title { margin: 6px 0 0; font-size: 11px; font-weight: 400; letter-spacing: .04em; line-height: 1.5; color: #555; overflow-wrap: anywhere; }
.review-grid .review-copy { flex: 1; min-height: 0; display: grid; align-content: start; gap: 18px; overflow-y: scroll; scrollbar-gutter: stable; }
#review-view-gallery { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
#review-view-gallery figure { margin: 0 !important; border: 0; }
#review-view-gallery button { padding: 0; border: 0; background: transparent; cursor: zoom-in; width: 100%; }
.review-grid .review-description { max-height: none; overflow: visible; font-size: 13px; line-height: 1.9; color: #666; }
.review-description strong { display: block; margin-bottom: 5px; font-size: 11px; font-weight: 400; line-height: 1.7; letter-spacing: .12em; color: #333; }
.review-image-viewer { width: min(95vw, 1200px); max-height: 95dvh; padding: 16px; border: 0; background: #fff; }
.review-image-viewer::backdrop { background: rgba(0,0,0,.8); }
.review-description .note-future, .review-description .note-background { display: grid; gap: 18px; }
.review-description .note-future > h3, .review-description .note-background > h3 { margin: 0; font-size: 13px; font-weight: 400; }
.review-description .note-future > h3 { font-size: 20px; line-height: 1.45; color: #222; }
.review-description .note-background { margin-top: 18px; border: 1px solid #ddd; padding: 14px; color: #888; }
.review-description .note-background strong { color: #888; }
.review-image-viewer img { max-height: 85dvh; object-fit: contain; }