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span{background:#0f172a}.chat-pronounce-helper{font-size:.74rem;color:#94a3b8;margin-top:6px;border-top:1px dashed rgba(255,255,255,.1);padding-top:5px;display:flex;flex-direction:column;gap:2px;transition:all .3s ease}.chat-pronounce-helper.active-helper{background:#00000052;border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:6px 10px;margin-top:8px;box-shadow:inset 0 1px 4px #0000004d}.chat-phonetic-badge{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;color:#38bdf8;font-weight:600;font-size:.8rem;letter-spacing:.2px}.chat-row.right .chat-phonetic-badge{color:#34d399}.chat-phonetic-cn{color:#fbbf24;font-size:.78rem}.chat-bubble-note{display:flex;align-items:flex-start;gap:4px;font-size:.73rem;color:#64748b;margin-top:4px;padding:2px 6px;max-width:100%;transition:all .3s ease}.chat-bubble-note.active-note{background:#f59e0b1f;border:1px solid rgba(245,158,11,.3);border-radius:8px;padding:6px 10px;margin-top:6px;color:#fde68a;box-shadow:0 2px 10px 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dot-blink{0%,to{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1.2)}}.quiz-section{width:100%;display:flex;flex-direction:column;gap:12px}.quiz-top-bar{display:flex;align-items:center;justify-content:space-between;width:100%}.quiz-back-btn{background:#ffffff14;border:1px solid rgba(255,255,255,.15);border-radius:10px;color:#e2e8f0;padding:6px 12px;font-size:.82rem;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:4px;transition:all .2s ease}.quiz-back-btn:hover{background:#ffffff26;border-color:#ffffff40;transform:translate(-2px)}.quiz-title-tag{background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:4px 12px;border-radius:20px;font-size:.85rem;font-weight:700;box-shadow:0 2px 10px #10b98159;display:flex;align-items:center;gap:4px}.quiz-hero-card{width:100%;background:linear-gradient(135deg,#10b9811f,#38bdf814);border:1px solid rgba(16,185,129,.25);border-radius:16px;padding:12px 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