:root {
    --bg: #000000;
    --card: #0a0a0a;
    --card-alt: #111111;
    --border: #1a1a1a;
    --border-light: #2a2a2a;
    --accent: #ffffff;
    --text: #e8e8e8;
    --text-secondary: #999999;
    --text-dim: #555555;
    --success: #ffffff;
    --warn: #cccccc;
    --danger: #ffffff;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --font-base: 20px;
    --font-sm: 16px;
    --font-xs: 13px;
    --font-lg: 26px;
    --font-xl: 32px;
    --font-title: 56px;
    --btn-h: 64px;
    --input-h: 56px;
    --gap: 20px;
    --transition: 0.2s ease;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }

  html, body {
    height: 100%;
    overflow: hidden;
  }

  body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: var(--font-base);
    line-height: 1.5;
    display: flex;
    justify-content: center;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
  }

  /* ===== CONTAINER ===== */
  .container {
    width: 100%;
    max-width: 1600px;
    height: 100vh;
    padding: 16px 60px 24px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  /* ===== HEADER ===== */
  .header {
    text-align: center;
    padding: 8px 0 4px;
    flex-shrink: 0;
  }

  .header h1 {
    font-size: var(--font-title);
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 6px;
    line-height: 1.2;
  }

  .header h1 .logo-icon {
    display: inline-block;
    width: 40px;
    height: 40px;
    margin-right: 14px;
    vertical-align: middle;
    color: var(--accent);
    animation: logo-breathe 2.2s ease-in-out infinite, logo-color-shift 2.2s ease-in-out infinite;
  }

  @keyframes logo-breathe {
    0%, 100% { transform: scale(1); opacity: 1; filter: drop-shadow(0 0 12px rgba(0,212,255,0.7)); }
    50% { transform: scale(0.85); opacity: 0.7; filter: drop-shadow(0 0 2px rgba(0,212,255,0.2)); }
  }
  @keyframes logo-color-shift {
    0%, 100% { color: #00d4ff; }
    50% { color: #ffffff; }
  }

  .header .sub {
    font-size: 14px;
    color: var(--text-dim);
    margin-top: 6px;
    letter-spacing: 6px;
    text-transform: uppercase;
    font-weight: 500;
  }

  /* ===== STEP BAR (HIDDEN) ===== */
  .steps {
    display: none !important;
  }

  /* ===== CARDS ===== */
  .card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    margin-bottom: 16px;
    position: relative;
  }

  .card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 1px;
    background: var(--border-light);
  }

  .card-title {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    letter-spacing: 3px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
  }

  .card-title .icon {
    font-size: 20px;
  }

  .card-title .icon svg {
    width: 18px;
    height: 18px;
    vertical-align: middle;
  }

  /* ===== UPLOAD ZONE ===== */
  .upload-row {
    display: flex;
    gap: 32px;
  }

  .upload-col {
    flex: 1;
    min-width: 0;
  }

  .upload-label {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin-bottom: 12px;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .upload-label .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-light);
    transition: all 0.3s;
  }

  .upload-label .dot.ready {
    background: var(--accent);
  }

  .upload-zone {
    border: 1px dashed var(--border-light);
    border-radius: var(--radius-md);
    padding: 32px 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 380px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--bg);
  }

  .upload-zone:hover,
  .upload-zone:active,
  .upload-zone.drag-over {
    border-color: var(--accent);
    background: rgba(255,255,255,0.02);
  }

  .upload-zone .icon-upload {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.6;
  }

  .upload-zone .icon-upload svg {
    width: 54px;
    height: 54px;
  }

  .upload-zone .text {
    font-size: var(--font-xl);
    color: var(--text-secondary);
    font-weight: 500;
  }

  .upload-zone .hint {
    font-size: var(--font-sm);
    color: var(--text-dim);
    margin-top: 10px;
  }

  .upload-zone img.preview {
    max-width: 100%;
    max-height: 340px;
    border-radius: var(--radius-sm);
    display: none;
    margin: 0 auto;
  }

  .upload-zone.has-image {
    border-style: solid;
    border-color: var(--border-light);
    background: var(--card);
    padding: 16px;
    min-height: auto;
  }

  .upload-zone.has-image .icon-upload,
  .upload-zone.has-image .text,
  .upload-zone.has-image .hint {
    display: none;
  }

  .upload-zone.has-image img.preview {
    display: block;
    margin-bottom: 12px;
  }

  /* Photo overlay actions */
  .upload-actions {
    display: none;
    justify-content: center;
    gap: 14px;
    margin-top: 12px;
    width: 100%;
  }

  .upload-zone.has-image .upload-actions {
    display: flex;
  }

  /* ===== CAPTURE BUTTON ===== */
  .capture-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 18px 0;
    margin-top: 14px;
    border: 1px solid var(--accent);
    background: transparent;
    color: var(--accent);
    font-size: var(--font-lg);
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 3px;
    transition: all 0.25s;
    min-height: var(--btn-h);
    border-radius: var(--radius-sm);
  }

  .capture-btn:hover {
    background: rgba(255,255,255,0.06);
  }

  .capture-btn:active {
    background: var(--accent);
    color: #000;
    transform: scale(0.98);
  }

  .capture-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
  }

  .capture-btn .cam-icon {
    display: flex;
    line-height: 1;
  }

  .capture-btn .cam-icon svg {
    width: 30px;
    height: 30px;
  }

  .capture-btn .btn-label {
    font-size: 32px;
  }

  .capture-btn .btn-sub {
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-dim);
  }

  /* Photo overlay retake/delete */
  .photo-overlay {
    display: none;
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    flex-direction: column;
    gap: 6px;
  }

  .photo-overlay.show {
    display: flex;
  }

  .upload-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 24px;
    font-size: var(--font-sm);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-light);
    color: var(--text);
    letter-spacing: 2px;
    transition: all 0.25s;
    background: transparent;
    border-radius: var(--radius-sm);
    min-height: 48px;
    min-width: 120px;
  }

  .upload-action-btn .cam-icon {
    display: flex;
    line-height: 1;
  }

  .upload-action-btn .cam-icon svg {
    width: 22px;
    height: 22px;
  }

  .upload-action-btn .btn-label {
    font-size: 15px;
  }

  .upload-action-btn .btn-sub {
    font-size: 10px;
  }

  .upload-action-btn:active {
    transform: scale(0.96);
  }

  .upload-action-retake:hover {
    border-color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
  }

  .upload-action-delete:hover {
    border-color: #774444;
    color: #cc8888;
    background: rgba(80,30,30,0.4);
  }

  /* ===== COUNTDOWN DISPLAY (right panel) ===== */
  .countdown-overlay {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 24px 0;
  }

  .countdown-overlay.show {
    display: flex;
  }

  .countdown-num {
    font-size: 96px;
    font-weight: 900;
    color: var(--accent);
    animation: countPulse 1s ease-in-out;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1;
  }

  @keyframes countPulse {
    0% { transform: scale(1.5); opacity: 0; }
    30% { transform: scale(1); opacity: 1; }
    90% { transform: scale(0.8); opacity: 0.7; }
    100% { transform: scale(0.6); opacity: 0; }
  }

  .countdown-label {
    font-size: var(--font-sm);
    color: var(--text-dim);
    letter-spacing: 2px;
  }

  /* ===== CAMERA PREVIEW MODAL ===== */
  .preview-modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.96);
    z-index: 9999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
  }

  .preview-modal.show {
    display: flex;
  }

  /* Left-right layout: feed on left, countdown + buttons on right */
  .preview-card {
    display: flex;
    gap: 48px;
    width: 100%;
    max-width: 1200px;
    align-items: center;
  }

  .preview-frame {
    position: relative;
    flex: 0 0 auto;
    height: min(90vh, 940px);
    aspect-ratio: 3/4;
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
  }

  .preview-frame img,
  .preview-frame video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    background: #000;
  }

  .preview-frame .no-signal {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    font-size: var(--font-base);
  }

  .preview-side {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 220px;
  }

  .preview-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .preview-actions .btn {
    width: 100%;
    padding: 20px 32px;
    min-width: 0;
    border-radius: var(--radius-sm);
    font-size: var(--font-lg);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-light);
    letter-spacing: 3px;
    transition: all 0.25s;
    min-height: var(--btn-h);
    background: transparent;
    color: var(--text);
  }

  .preview-actions .btn:hover {
    border-color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
  }

  .preview-actions .btn:active {
    transform: scale(0.96);
  }

  .preview-actions .btn-cancel {
    border-color: var(--border-light);
    color: var(--text-secondary);
  }

  .preview-actions .btn-cancel:active {
    background: rgba(255,255,255,0.05);
  }

  .preview-actions .btn-start {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-family: inherit;
  }

  .preview-actions .btn-start .cam-icon {
    font-size: 30px;
    line-height: 1;
    display: flex;
  }

  .preview-actions .btn-start .cam-icon svg {
    width: 30px;
    height: 30px;
  }

  .preview-actions .btn-start .btn-label {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 3px;
    margin-top: 4px;
  }

  .preview-actions .btn-start .btn-sub {
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 2px;
  }

  .preview-actions .btn-start:hover {
    background: #e8e8e8;
    color: #000;
    border-color: var(--accent);
  }

  .preview-actions .btn-start:active {
    transform: scale(0.96);
  }

  .preview-actions .btn-start:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
  }

  .preview-hint {
    margin-top: 16px;
    font-size: var(--font-sm);
    color: var(--text-dim);
    letter-spacing: 2px;
  }

  /* ===== CAPTURE RESULT MODAL (PixVerse-style) ===== */
  .capture-result-modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: #000;
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 48px;
  }

  .capture-result-modal.show {
    display: flex;
  }

  .capture-result-card {
    display: flex;
    align-items: center;
    gap: 48px;
    max-width: 1200px;
    width: 100%;
  }

  .capture-result-img {
    height: min(90vh, 940px);
    aspect-ratio: 3/4;
    width: auto;
    object-fit: cover;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #000;
  }

  .capture-result-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 32px;
  }

  .capture-result-title {
    font-size: 56px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 6px;
    line-height: 1.15;
  }

  .capture-result-actions {
    display: flex;
    gap: 16px;
    margin-top: 8px;
  }

  .capture-result-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 20px 32px;
    min-width: 180px;
    border: 1px solid var(--border-light);
    background: transparent;
    color: var(--text);
    font-family: inherit;
    transition: all 0.25s;
    border-radius: var(--radius-sm);
    cursor: pointer;
  }

  .capture-result-btn:active {
    transform: scale(0.96);
  }

  .capture-result-btn .cam-icon {
    font-size: 30px;
    line-height: 1;
    display: flex;
  }

  .capture-result-btn .cam-icon svg {
    width: 30px;
    height: 30px;
  }

  .capture-result-btn .btn-label {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 3px;
    margin-top: 4px;
  }

  .capture-result-btn .btn-sub {
    font-size: 11px;
    color: var(--text-dim);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 2px;
  }

  .capture-result-btn-retake:hover {
    border-color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
  }

  .capture-result-btn-continue {
    border-color: var(--accent);
    background: var(--accent);
    color: #000;
    font-weight: 600;
  }

  .capture-result-btn-continue:hover {
    background: #e8e8e8;
  }

  /* Process action buttons (processed image card) */
  .process-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    flex: 1;
    padding: 14px 18px;
    min-width: 110px;
    border: 1px solid var(--border-light);
    background: transparent;
    color: var(--text);
    font-family: inherit;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.25s;
  }

  .process-action-btn:active {
    transform: scale(0.96);
  }

  .process-action-btn .pa-icon {
    display: flex;
    line-height: 1;
  }

  .process-action-btn .pa-icon svg {
    width: 22px;
    height: 22px;
  }

  .process-action-btn .btn-label {
    font-size: 15px;
  }

  .process-action-btn .btn-sub {
    font-size: 10px;
  }

  .process-action-back:hover,
  .process-action-retry:hover {
    border-color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
  }

  .process-action-save {
    border-color: var(--accent);
    color: var(--accent);
  }

  .process-action-save:hover {
    background: rgba(255,255,255,0.06);
  }

  .process-action-save:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    color: var(--text-dim);
    border-color: var(--border-light);
  }

  /* Camera confirm bar */
  .cam-confirm {
    display: none;
    justify-content: center;
    gap: 12px;
    margin-top: 10px;
  }

  .cam-confirm.show {
    display: flex;
  }

  .cam-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: var(--font-sm);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-light);
    letter-spacing: 3px;
    transition: all 0.25s;
    min-height: 48px;
    background: transparent;
    color: var(--text);
  }

  .cam-btn .cam-icon {
    display: flex;
    line-height: 1;
  }

  .cam-btn .cam-icon svg {
    width: 24px;
    height: 24px;
  }

  .cam-btn .btn-label {
    font-size: 14px;
  }

  .cam-btn .btn-sub {
    font-size: 9px;
  }

  .cam-btn:hover {
    border-color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
  }

  .cam-btn:active {
    transform: scale(0.96);
  }

  .cam-ok {
    border-color: var(--accent);
    color: var(--accent);
  }

  .cam-ok:hover {
    background: rgba(255,255,255,0.06);
  }

  .cam-retake:hover {
    background: rgba(255,255,255,0.04);
  }

  /* ===== PROCESSED IMAGE CARD ===== */
  .processed-preview {
    text-align: center;
    padding: 16px 0;
  }

  .processed-preview img {
    max-width: 60%;
    border-radius: var(--radius-md);
    background: #000;
    border: 1px solid var(--border);
  }

  .processed-preview .status-row {
    margin-top: 14px;
    display: flex;
    justify-content: center;
    gap: 28px;
  }

  .processed-preview .stat {
    font-size: var(--font-sm);
    color: var(--text-dim);
  }

  .processed-preview .stat span {
    color: var(--text-secondary);
  }

  /* ===== INPUTS ===== */
  .input-group {
    margin-bottom: 16px;
  }

  .input-group label {
    display: block;
    font-size: var(--font-sm);
    color: var(--text-dim);
    margin-bottom: 8px;
    letter-spacing: 1px;
  }

  textarea,
  input[type="text"] {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    color: var(--text);
    font-size: var(--font-base);
    font-family: inherit;
    outline: none;
    resize: vertical;
    transition: border-color var(--transition);
    min-height: var(--input-h);
  }

  textarea:focus,
  input[type="text"]:focus {
    border-color: var(--text-dim);
  }

  .param-row {
    display: flex;
    gap: 16px;
  }

  .param-row .input-group {
    flex: 1;
  }

  select {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 36px 14px 16px;
    color: var(--text);
    font-size: var(--font-base);
    font-family: inherit;
    outline: none;
    cursor: pointer;
    appearance: none;
    min-height: var(--input-h);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
  }

  select:focus {
    border-color: var(--text-dim);
  }

  /* AI形象选项 — Pinterest 式瀑布流卡片 */
  .option-waterfall {
    display: none;
  }

  .opt-tabs {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    margin-bottom: 18px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .opt-tabs::-webkit-scrollbar { display: none; }

  /* 形象选项 tab 栏吸顶：滚动时长留在系统名称下方 */
  .opt-sticky-bar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: var(--card);
    padding: 8px 0 12px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--border);
  }

  .opt-tab {
    flex: 0 0 auto;
    position: relative;
    padding: 12px 22px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--card);
    color: var(--text-dim);
    font-size: 24px;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: border-color .18s, color .18s, background .18s;
  }
  .opt-tab.active {
    border-color: var(--accent);
    color: var(--text);
    background: rgba(255,255,255,0.05);
  }
  .opt-tab.has-sel::after {
    content: '';
    position: absolute;
    top: 6px; right: 8px;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--accent);
  }

  .opt-toolbar-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
  }
  .opt-summary {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
  }
  .opt-clear {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 10px 18px;
    border: 1px solid var(--border-light);
    border-radius: 999px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 16px;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.25s;
  }

  .opt-clear .cam-icon {
    display: flex;
    line-height: 1;
  }

  .opt-clear .cam-icon svg {
    width: 22px;
    height: 22px;
  }

  .opt-clear .btn-label {
    font-size: 18px;
    font-weight: 500;
  }

  .opt-clear .btn-sub {
    font-size: 12px;
  }
  .opt-clear:hover { border-color: var(--text-secondary); color: var(--text); }
  .opt-clear:active { transform: scale(0.96); border-color: var(--accent); color: var(--text); }

  /* ---- 形象选项：CSS columns 真·瀑布流（每列独立堆叠，无横向行缝隙） ---- */
  .opt-cards {
    column-count: 3;
    column-gap: 10px;
  }

  .opt-card {
    position: relative;
    display: block;
    width: 100%;
    margin: 0 0 10px;
    break-inside: avoid;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--card);
    color: var(--text);
    text-align: left;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  }
  .opt-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.35);
    border-color: var(--border-light);
  }
  .opt-card:active {
    transform: scale(0.98);
  }

  /* 图片区域：高度由 JS 随机设定（竖向随机大小），cover 铺满不留缝隙 */
  .opt-thumb {
    width: 100%;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    position: relative;
    font-size: 20px;
    color: rgba(255,255,255,0.8);
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    background-size: cover !important;
    background-position: center !important;
  }

  /* 参考图：铺满缩略图，cover 保证填满无空白缝隙 */
  .opt-thumb-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
  }

  /* 标签叠加在图片底部 */
  .opt-label {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 24px 10px 10px;
    font-size: 13px;
    line-height: 1.3;
    font-weight: 500;
    letter-spacing: 0.5px;
    background: linear-gradient(transparent 0%, rgba(0,0,0,0.82) 100%);
    text-shadow: 0 1px 2px rgba(0,0,0,0.6);
    pointer-events: none;
    z-index: 1;
  }
  .opt-label::before {
    content: "";
    display: block;
    width: 20px;
    height: 2px;
    background: var(--accent);
    margin-bottom: 6px;
    border-radius: 1px;
  }

  /* 精修效果图 + 下载二维码：上下布局，二维码放大便于扫码 */
  .large-preview {
    display: flex;
    flex-direction: column;
    gap: 18px;
    align-items: center;
    margin-top: 14px;
  }
  .large-preview .lp-main {
    width: 100%;
    text-align: center;
  }
  .large-preview .lp-qr {
    flex: 0 0 auto;
    width: auto;
    min-width: 220px;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    box-shadow: 0 4px 18px rgba(0,0,0,0.25);
  }
  .large-preview .lp-qr-title {
    font-size: 13px;
    color: var(--text);
    font-weight: 600;
    letter-spacing: 0.5px;
    line-height: 1.3;
  }
  .large-preview .lp-qr-img {
    width: 200px;
    height: 200px;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    background: #fff;
    display: block;
    padding: 8px;
  }
  .large-preview .lp-qr-tip {
    font-size: 12px;
    color: var(--dim);
    line-height: 1.3;
  }
  @media (max-width: 460px) {
    .large-preview .lp-qr { width: 100%; min-width: auto; padding: 14px; }
    .large-preview .lp-qr-img { width: 170px; height: 170px; }
  }

  /* 选中态：发光边框 */
  .opt-card.selected {
    box-shadow: 0 0 0 2px var(--accent), 0 0 12px rgba(0,212,255,0.3), 0 8px 24px rgba(0,0,0,0.4);
    transform: translateY(-2px);
  }

  /* 选中勾：右下角圆标（系统同款 line SVG） */
  .opt-card .check-icon {
    display: none;
    position: absolute;
    bottom: 8px; right: 8px;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--accent);
    color: #04121a;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.35), inset 0 0 0 1.5px rgba(255,255,255,0.85);
    z-index: 2;
  }
  .opt-card .check-icon svg {
    width: 14px; height: 14px;
    display: block;
  }
  .opt-card.selected .check-icon {
    display: flex;
  }

  /* 分类标签小标记（图片左上角） */
  .opt-card .cat-tag {
    position: absolute;
    top: 6px; left: 6px;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(0,0,0,0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: rgba(255,255,255,0.85);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.5px;
    z-index: 2;
    pointer-events: none;
  }

  .option-grid-toggle {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    font-size: var(--font-sm);
    color: var(--text-dim);
    margin-bottom: 20px;
    user-select: none;
    padding: 12px 0;
  }

  .option-grid-toggle .cam-icon {
    display: flex;
    line-height: 1;
  }

  .option-grid-toggle .cam-icon svg {
    width: 24px;
    height: 24px;
  }

  .option-grid-toggle .btn-label {
    font-size: 24px;
    font-weight: 600;
    color: var(--text);
  }

  .option-grid-toggle .btn-sub {
    font-size: 14px;
    font-weight: 500;
  }

  /* 通用双语按钮内部元素（icon + 中文 + 英文） */
  .cam-icon { display: inline-flex; align-items: center; justify-content: center; line-height: 1; flex: none; }
  .cam-icon svg { width: 22px; height: 22px; display: block; }
  .btn-label { font-weight: 600; letter-spacing: 2px; }
  .btn-sub { font-size: 10px; letter-spacing: 2px; text-transform: uppercase; color: var(--text-dim); }

  /* ===== BUTTONS ===== */
  .btn {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid var(--border-light);
    background: transparent;
    color: var(--text);
    border-radius: var(--radius-sm);
    font-size: var(--font-lg);
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 3px;
    transition: all 0.25s;
    min-height: var(--btn-h);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
  }

  .btn:active {
    transform: scale(0.96);
  }

  .btn-primary {
    background: var(--accent);
    color: #000;
    font-weight: 700;
  }

  .btn-primary:active {
    transform: scale(0.98);
    opacity: 0.85;
  }

  .btn-primary:disabled {
    opacity: 0.25;
    cursor: not-allowed;
    transform: none;
  }

  /* 第一步「下一步」按钮常驻页面底部，便于随时进入下一步 */
  #btnProcess {
    position: sticky;
    bottom: 0;
    z-index: 30;
    margin-top: 14px;
    padding: 24px 20px;
    min-height: 96px;
    box-shadow: 0 -12px 22px var(--card);
  }

  /* 各步骤底部操作区常驻吸底（覆盖四个步骤） */
  .sticky-bottom {
    position: sticky;
    bottom: 0;
    z-index: 30;
    margin-top: 8px;
    padding-top: 12px;
    background: var(--bg);
    box-shadow: 0 -14px 24px var(--bg);
  }

  .btn-outline {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text);
    margin-top: 12px;
  }

  .btn-outline:hover {
    border-color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
  }

  .btn-outline:active {
    transform: scale(0.96);
    background: rgba(255,255,255,0.06);
  }

  .at-tag {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: var(--font-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
    border: 1px solid var(--border-light);
    letter-spacing: 2px;
    min-height: 44px;
    background: transparent;
    color: var(--text-secondary);
  }

  .at-tag .cam-icon {
    display: flex;
    line-height: 1;
  }

  .at-tag .cam-icon svg {
    width: 16px;
    height: 16px;
  }

  .at-tag .btn-label {
    font-size: 12px;
  }

  .at-tag .btn-sub {
    font-size: 8px;
  }

  .at-tag:hover {
    border-color: var(--text-dim);
    color: var(--accent);
    background: rgba(255,255,255,0.04);
  }

  .at-tag:active {
    transform: scale(0.96);
  }

  .at-tag-char,
  .at-tag-scene {
    border-color: var(--border-light);
    color: var(--text-secondary);
    background: transparent;
  }

  .at-tag-char.active,
  .at-tag-scene.active {
    border-color: var(--accent);
    color: #000;
    background: var(--accent);
  }

  /* MiniMax H3 参考素材 @ 标签配色 */
  .at-tag-h3video {
    border-color: rgba(76, 217, 100, 0.5);
    color: var(--green);
    background: rgba(76, 217, 100, 0.08);
  }

  .at-tag-h3audio {
    border-color: rgba(255, 159, 10, 0.5);
    color: var(--orange);
    background: rgba(255, 159, 10, 0.08);
  }

  .btn-group {
    display: flex;
    gap: 14px;
  }

  .btn-group .btn {
    flex: 1;
    margin-top: 0;
  }

  .btn-sm {
    padding: 12px 16px;
    font-size: var(--font-base);
  }

  /* ===== PROGRESS ===== */
  .progress-wrap {
    display: none;
    margin: 14px 0;
  }

  .progress-wrap.show {
    display: block;
  }

  .progress-bar-wrap {
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin: 14px 0;
  }

  .progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.5s;
  }

  @keyframes shimmer {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
  }

  .progress-info {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-sm);
    color: var(--text-dim);
  }

  .progress-status {
    text-align: center;
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin-top: 10px;
  }

  /* ===== RESULT SECTION ===== */
  .result-section {
    display: none;
  }

  .result-section.show {
    display: block;
  }

  .result-section video {
    width: 100%;
    border-radius: var(--radius-md);
    background: #000;
    margin-bottom: 14px;
    max-height: 60vh;
    border: 1px solid var(--border);
  }

  .result-url {
    font-size: var(--font-xs);
    color: var(--text-dim);
    word-break: break-all;
    background: var(--card);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-top: 8px;
    border: 1px solid var(--border);
  }

  /* ===== BADGES ===== */
  .badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: var(--font-xs);
    font-weight: 600;
    letter-spacing: 1px;
  }

  .badge-success {
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
  }

  .badge-processing {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-light);
    color: var(--text-dim);
  }

  .badge-error {
    background: rgba(255,60,60,0.08);
    border: 1px solid #3a2020;
    color: #aa6666;
  }

  /* ===== TOAST ===== */
  .toast {
    position: fixed;
    top: 32px;
    left: 50%;
    transform: translateX(-50%);
    padding: 14px 36px;
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
    letter-spacing: 2px;
    z-index: 10000;
    pointer-events: none;
    transition: all 0.3s;
    opacity: 0;
    background: var(--card-alt);
    color: var(--text);
    border: 1px solid var(--border-light);
  }

  .toast.show {
    opacity: 1;
  }

  .toast.error {
    background: #1a0a0a;
    border-color: #3a2020;
    color: #cc8888;
  }

  .toast.success {
    background: var(--card-alt);
    border-color: var(--border-light);
    color: var(--success);
  }

  .toast.info {
    background: var(--card-alt);
    border-color: var(--border-light);
    color: var(--text-secondary);
  }

  /* ===== SECTIONS ===== */
  .section {
    display: none;
  }

  .section.active {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
  }

  .section.step-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 4px;
  }

  .section.step-content::-webkit-scrollbar {
    width: 4px;
  }

  .section.step-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
  }

  #fileInput {
    display: none;
  }

  /* ===== IMAGE ZOOM MODAL ===== */
  .img-modal {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.95);
    z-index: 99999;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
    padding: 32px;
  }

  .img-modal.show {
    display: flex;
  }

  .img-modal img {
    max-width: 92%;
    max-height: 84%;
    object-fit: contain;
    border-radius: var(--radius-md);
  }

  .close-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.14);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: rgba(255,255,255,0.72);
    font-size: var(--font-sm);
    font-weight: 500;
    letter-spacing: 2px;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
    pointer-events: none;
    user-select: none;
    opacity: 0;
    animation: closeHintIn 0.4s ease 0.15s forwards;
  }

  @keyframes closeHintIn {
    from { opacity: 0; transform: translateX(-50%) translateY(8px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
  }

  .zoomable {
    cursor: zoom-in;
    transition: transform 0.2s;
  }

  .zoomable:active {
    transform: scale(0.97);
  }

  /* ===== IMAGE GALLERY ===== */
  .gallery-row {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding: 8px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
  }

  .gallery-row::-webkit-scrollbar {
    height: 4px;
  }

  .gallery-row::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
  }

  .gallery-thumb {
    width: 120px;
    height: 120px;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
  }

  .gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .gallery-thumb.selected {
    border-color: var(--accent);
  }

  .gallery-thumb .check-icon {
    display: none;
  }

  .gallery-thumb.selected .check-icon {
    display: flex;
    position: absolute;
    top: 4px; right: 4px;
    width: 20px; height: 20px;
    background: var(--accent);
    color: #04121a;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.35), inset 0 0 0 1.5px rgba(255,255,255,0.85);
  }
  .gallery-thumb .check-icon svg {
    width: 12px; height: 12px;
    display: block;
  }

  .gallery-thumb .gen-label {
    position: absolute;
    top: 4px; left: 4px;
    font-size: 11px;
    background: rgba(0,0,0,0.7);
    color: var(--text-secondary);
    padding: 2px 6px;
    border-radius: 4px;
    display: none;
  }

  .gallery-thumb.latest .gen-label {
    display: block;
  }

  .gallery-empty {
    font-size: var(--font-sm);
    color: var(--text-dim);
    text-align: center;
    padding: 14px 0;
  }

  /* Large preview in step 2 */
  #largePreviewImg {
    max-width: 100%;
    border-radius: var(--radius-md);
    background: #000;
    border: 1px solid var(--border);
    display: block;
    margin: 0 auto;
  }

  .hint-tag {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    font-size: var(--font-xs);
    color: var(--text-dim);
    border-radius: var(--radius-sm);
  }

  /* Confirm button active state */
  .btn-primary.selected-active {
    background: var(--accent);
  }

  /* ===== SCENE GALLERY (Step 3) ===== */
  /* ===== SCENE MASONRY WATERFALL ===== */
  .scene-grid {
    column-count: 4;
    column-gap: 12px;
    margin-top: 0;
  }

  .scene-thumb {
    break-inside: avoid;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 12px;
    background: var(--card);
  }

  .scene-thumb img {
    width: 100%;
    display: block;
    transition: transform 0.35s ease, filter 0.35s ease;
    object-fit: cover;
  }

  .scene-thumb .scene-label {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.82));
    color: #fff;
    font-size: 12px;
    text-align: left;
    padding: 24px 10px 10px;
    letter-spacing: 0.5px;
    font-weight: 500;
    line-height: 1.3;
  }

  .scene-thumb .scene-label::before {
    content: "";
    display: block;
    width: 20px;
    height: 2px;
    background: var(--accent);
    margin-bottom: 6px;
    border-radius: 1px;
  }

  .scene-thumb:hover {
    border-color: var(--text-dim);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  }

  .scene-thumb:hover img {
    transform: scale(1.03);
    filter: brightness(1.08);
  }

  .scene-thumb.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent), 0 8px 24px rgba(255,255,255,0.06);
  }

  .scene-thumb.selected .scene-label::before {
    width: 28px;
    background: var(--accent);
  }

  /* Collapsible card */
  .collapsible-card {
    padding-bottom: 16px;
  }

  .collapsible-card .collapsible-header {
    padding-bottom: 0;
    margin-bottom: 0;
    width: 100%;
    cursor: pointer;
  }

  .collapsible-card .collapsible-header:hover .collapsible-arrow {
    color: var(--text-secondary);
  }

  .collapsible-card .collapsible-content {
    overflow: hidden;
    transition: max-height 0.35s ease-out, opacity 0.25s, visibility 0s linear 0.35s, padding 0.25s;
    max-height: 3000px;
    opacity: 1;
    visibility: visible;
    padding-top: 8px;
  }

  .collapsible-card[data-collapsed="true"] .collapsible-content {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    padding-top: 0;
    margin-top: 0;
  }

  .collapsible-card[data-collapsed="true"] .collapsible-header {
    margin-bottom: 0;
    padding-bottom: 0;
  }

  .collapsible-card[data-collapsed="true"] .collapsible-arrow {
    transform: rotate(-90deg);
  }

  .collapsible-card[data-collapsed="true"] {
    padding-bottom: 12px;
  }

  .collapsible-card[data-collapsed="false"] {
    padding-bottom: 16px;
  }

  /* ===== SPINNER ===== */
  .spinner {
    display: inline-block;
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: 8px;
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  /* ===== STEP 1 WRAP ===== */
  .step1-wrap {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 4px;
  }

  .step1-wrap::-webkit-scrollbar {
    width: 4px;
  }

  .step1-wrap::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
  }

  /* Scene hint text */
  .scene-hint {
    margin-top: 10px;
    font-size: var(--font-xs);
    color: var(--text-dim);
    text-align: center;
  }

  /* QR code */
  #qrcodeImg {
    width: 140px;
    height: 140px;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    padding: 8px;
    background: #fff;
  }

  /* ===== RESPONSIVE ===== */

  @media (max-width: 1100px) {
    .container {
      max-width: 900px;
      height: auto;
      overflow-y: auto;
      padding: 20px 28px 60px;
    }
    .section.active {
      display: block;
      flex: none;
      overflow: visible;
    }
    .section.step-content {
      flex: none;
      overflow-y: visible;
      padding-right: 0;
    }
    .step1-wrap {
      display: flex;
      flex-direction: column;
      overflow-y: visible;
      padding-right: 0;
      flex: none;
      min-height: calc(100vh - 240px);
    }
    :root {
      --font-base: 17px;
      --font-sm: 14px;
      --font-xs: 12px;
      --font-lg: 22px;
      --font-xl: 26px;
      --font-title: 42px;
      --btn-h: 56px;
      --input-h: 48px;
    }
    .scene-grid { column-count: 3; }
    .gallery-thumb {
      width: 90px;
      height: 90px;
    }
    .opt-cards { column-count: 3; }
    .card {
      padding: 20px;
      margin-bottom: 14px;
    }
    .upload-zone {
      min-height: 280px;
    }
  }

  @media (max-width: 640px) {
    .container {
      max-width: 480px;
      height: auto;
      overflow-y: auto;
      padding: 16px 20px 48px;
    }
    .section.active {
      display: block;
      flex: none;
      overflow: visible;
    }
    .section.step-content {
      flex: none;
      overflow-y: visible;
      padding-right: 0;
    }
    .step1-wrap {
      display: flex;
      flex-direction: column;
      overflow-y: visible;
      padding-right: 0;
      flex: none;
      min-height: calc(100vh - 240px);
    }
    :root {
      --font-base: 15px;
      --font-sm: 13px;
      --font-xs: 11px;
      --font-lg: 19px;
      --font-xl: 23px;
      --font-title: 32px;
      --btn-h: 50px;
      --input-h: 44px;
    }
    .scene-grid { column-count: 2; }
    .gallery-thumb {
      width: 70px;
      height: 70px;
    }
    .upload-row {
      flex-direction: column;
    }
    .preview-modal {
      padding: 16px;
    }
    .preview-card {
      flex-direction: column;
      gap: 24px;
    }
    .preview-frame {
      width: 100%;
      max-width: 100%;
      height: auto;
      aspect-ratio: 3/4;
    }
    .preview-side {
      width: 100%;
      min-width: 0;
    }
    .countdown-num {
      font-size: 60px;
    }
    .btn {
      padding: 13px 16px;
      border-radius: var(--radius-sm);
    }
    .opt-cards { column-count: 3; }
    .card {
      padding: 16px;
      margin-bottom: 12px;
    }
    .header h1 {
      font-size: 26px;
      letter-spacing: 3px;
    }
    .header h1 .logo-icon {
      width: 32px;
      height: 32px;
      margin-right: 10px;
    }
    .header .sub {
      font-size: 11px;
    }
    .preview-actions .btn {
      padding: 10px 24px;
      min-width: 0;
    }
    .capture-result-card {
      flex-direction: column;
      gap: 24px;
    }
    .capture-result-img {
      width: 100%;
      max-width: 100%;
      height: auto;
    }
    .capture-result-title {
      font-size: 32px;
      text-align: center;
      width: 100%;
    }
    .capture-result-actions {
      flex-direction: column;
      justify-content: center;
      width: 100%;
      gap: 14px;
    }
    .capture-result-btn {
      width: 100%;
      max-width: none;
      min-width: 0;
    }
    .upload-zone {
      min-height: 200px;
    }
    .upload-zone .icon-upload {
      font-size: 48px;
    }
  }

  /* Portrait kiosk optimization: 1080x1920 touchscreen */
  @media (max-width: 1100px) and (orientation: portrait) {
    :root {
      --font-base: 15px;
      --font-sm: 13px;
      --font-xs: 11px;
      --font-lg: 19px;
      --font-xl: 22px;
      --font-title: 36px;
      --btn-h: 52px;
      --input-h: 46px;
    }
    .container {
      max-width: 100%;
      height: 100dvh;
      height: 100vh;
      overflow: hidden;
      padding: 8px 20px 0;
    }
    .header { padding: 6px 0 4px; flex-shrink: 0; }
    .header h1 { font-size: var(--font-title); letter-spacing: 2px; }
    .header h1 .logo-icon { width: 28px; height: 28px; margin-right: 8px; }
    .header .sub { font-size: 12px; margin-top: 4px; letter-spacing: 2px; }
    .steps { display: none !important; }
    .section.active {
      display: flex;
      flex-direction: column;
      flex: 1;
      min-height: 0;
      overflow: hidden;
    }
    .section.step-content {
      flex: 1;
      overflow-y: auto;
      overflow-x: hidden;
      padding-right: 4px;
      padding-bottom: 120px;
    }
    .step1-wrap {
      flex: 1;
      min-height: 0;
      overflow-y: auto;
      overflow-x: hidden;
      padding-right: 4px;
    }
    .card {
      padding: 14px;
      margin-bottom: 10px;
      border-radius: var(--radius-sm);
    }
    .card-title {
      margin-bottom: 8px;
      letter-spacing: 1px;
      font-size: var(--font-sm);
    }
    .card-title .icon { font-size: 18px; }
    .processed-preview { padding: 6px 0; }
    .processed-preview img {
      max-width: 45%;
      max-height: 16vh;
      border-radius: var(--radius-sm);
    }
    .processed-preview .resolution-tag,
    .processed-preview .status-row { display: none; }
    .scene-grid { column-count: 3; column-gap: 6px; }
    .scene-thumb {
      border-radius: var(--radius-sm);
      border-width: 1px;
      margin-bottom: 6px;
    }
    .scene-thumb .scene-label {
      padding: 18px 6px 6px;
      font-size: 9px;
    }
    .scene-hint { margin-top: 6px; font-size: 10px; }
    #scenePreview { margin-top: 6px; }
    #scenePreviewImg {
      max-height: 14vh;
      border-radius: var(--radius-sm);
    }
    .input-group { margin-bottom: 8px; }
    .input-group label {
      margin-bottom: 4px;
      font-size: var(--font-xs);
      letter-spacing: 1px;
    }
    textarea { min-height: 52px; padding: 10px; font-size: var(--font-base); }
    input[type="text"] { padding: 10px; }
    .param-row { gap: 8px; }
    .select {
      padding: 10px 28px 10px 12px;
      min-height: var(--input-h);
      font-size: var(--font-base);
    }
    .btn {
      padding: 13px;
      min-height: var(--btn-h);
      font-size: var(--font-lg);
      border-radius: var(--radius-sm);
    }
    .btn-outline { margin-top: 8px; }
    /* 各步骤底部按钮统一由 .sticky-bottom 吸底，此处不再单独处理 */
    .btn-sm { padding: 11px; font-size: var(--font-base); }
    .btn-group { gap: 10px; }
    .at-tag {
      padding: 6px 14px;
      min-height: 36px;
      font-size: 12px;
      border-radius: 16px;
    }
    .upload-zone { min-height: 160px; }
    .upload-zone .icon-upload { font-size: 48px; }
    .upload-zone .text { font-size: var(--font-xl); }
    .capture-btn {
      padding: 14px 0;
      min-height: var(--btn-h);
      font-size: var(--font-lg);
      margin-top: 10px;
    }
    .capture-btn .cam-icon { font-size: 26px; }
    .gallery-thumb { width: 76px; height: 76px; }
    .gallery-row { gap: 8px; }
    .opt-cards { column-count: 3; column-gap: 8px; }
    .collapsible-card .collapsible-header{ font-size: 13px; margin-bottom: 0; width: 100%; }
    .collapsible-card .collapsible-arrow{ font-size: 14px; }
    .collapsible-card[data-collapsed="true"]{ padding: 10px 14px; }
    .collapsible-card[data-collapsed="false"]{ padding: 12px 14px 14px; }
    .collapsible-card[data-collapsed="false"] .scene-grid{ column-gap: 6px; }
    .collapsible-card[data-collapsed="false"] .scene-thumb{
      border-width: 1px;
      border-radius: var(--radius-sm);
      margin-bottom: 6px;
    }
    .collapsible-card[data-collapsed="false"] .scene-thumb .scene-label{
      font-size: 9px;
      padding: 14px 5px 5px;
    }
    .param-row{ display:flex; gap:8px; }
    .param-row .input-group{ flex:1; min-width:0; }
    .param-row .input-group label{ font-size:10px; margin-bottom:2px; }
    .param-row select{ padding:8px 24px 8px 8px; font-size:13px; min-height:38px; }
    .card textarea{ min-height:56px; font-size:14px; padding:8px; }
  }
}

/* ===== 亭端广告位（Step1 拍照前展示，占据按钮到页面底部之间的剩余空间并垂直居中） ===== */
.ad-slot-box {
  display: none; /* 初始隐藏，由 JS 在配置就绪后显示 */
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 200px;
  margin: 28px auto 0;
  border-radius: var(--radius-sm, 10px);
  overflow: hidden;
  background: #0e1419;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-sizing: border-box;
}
.ad-slot-box .ad-media {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  cursor: pointer;
  background: #000;
  border: 0;
  margin: 0 auto;
}
@media (max-width: 640px) {
  .ad-slot-box { margin-top: 20px; min-height: 160px; }
}
    .card{ padding:12px 14px; margin-bottom:8px; }
    .processed-preview{ padding:4px 0; margin-bottom:6px; }
    .processed-preview img{ max-width:60%; border-radius: var(--radius-sm); background:#000; }
    #secConfirm{ padding-bottom:140px; }
    #secResult{ padding-bottom:140px; }
    #qrcodeImg{ width:140px; height:140px; padding:6px; }
    /* 拍照成功弹窗：竖屏触屏下按钮整宽堆叠，避免超出边框，与拍照按钮风格一致 */
    .capture-result-modal { padding: 20px; }
    .capture-result-card {
      flex-direction: column;
      align-items: center;
      gap: 20px;
      padding: 24px;
      max-width: 100%;
    }
    .capture-result-img {
      width: 100%;
      max-width: 340px;
      height: auto;
      aspect-ratio: 3 / 4;
    }
    .capture-result-content {
      width: 100%;
      align-items: stretch;
      gap: 18px;
    }
    .capture-result-title {
      font-size: 34px;
      text-align: center;
      width: 100%;
    }
    .capture-result-actions {
      flex-direction: column;
      width: 100%;
      gap: 14px;
    }
    .capture-result-btn {
      width: 100%;
      max-width: none;
      min-width: 0;
      min-height: var(--btn-h);
      padding: 14px 20px;
    }
    .capture-result-btn .btn-label { font-size: 18px; }
  }