@import"https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Noto+Sans+TC:wght@300;400;500;600&display=swap";.duoscene-app{--ds-bg: #0F1117;--ds-bg-card: #1A1D27;--ds-bg-elevated: #222636;--ds-text-primary: #F0EDE6;--ds-text-secondary: #9B97A0;--ds-text-zh: #C8B8A0;--ds-accent: #FF6B4A;--ds-accent-soft: rgba(255,107,74,.12);--ds-char-a: #5BC0EB;--ds-char-b: #FFC857;--ds-starter: #4ADE80;--ds-intermediate: #FFC857;--ds-confident: #F472B6;--ds-grammar-bg: rgba(91,192,235,.05);--ds-grammar-border: rgba(91,192,235,.18);--ds-vocab-bg: rgba(255,107,74,.04);--ds-vocab-border: rgba(255,107,74,.18);--ds-border: rgba(255,255,255,.06);--ds-radius: 14px;--ds-radius-sm: 8px;position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden}.ds-app-shell{font-family:Outfit,Noto Sans 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.ds-card-zh{font-size:12px;color:var(--ds-text-zh);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ds-card-body .ds-card-meta{font-size:11px;color:var(--ds-text-secondary);display:flex;gap:6px;margin-top:3px}.ds-card-arrow{font-size:20px;color:var(--ds-text-secondary);font-weight:300;flex-shrink:0}.ds-scene-reader{padding:0 0 40px;overflow-x:hidden}.ds-reader-toolbar{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;position:sticky;top:0;background:#0f1117eb;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:50;max-width:1100px;margin:0 auto}.ds-btn-back{background:none;border:none;color:var(--ds-accent);font-family:Outfit,sans-serif;font-size:14px;cursor:pointer}.ds-toolbar-actions{display:flex;gap:8px}.ds-btn-toggle{background:var(--ds-bg-elevated);border:1px solid var(--ds-border);color:var(--ds-text-secondary);font-family:Outfit,sans-serif;font-size:13px;padding:6px 12px;border-radius:20px;cursor:pointer;transition:all 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