*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f0f1a;--surface: #1a1a2e;--surface2: #22223b;--border: rgba(255,255,255,.08);--border2: rgba(255,255,255,.15);--text: #e8e8f0;--text2: #9090b0;--accent: #7c6ff7;--accent-light: #a89cf8;--accent-bg: rgba(124,111,247,.12);--correct: #4caf82;--correct-bg: rgba(76,175,130,.12);--wrong: #e05c5c;--wrong-bg: rgba(224,92,92,.12);--radius: 12px;--radius-sm: 8px;--bg-overlay-opacity: .85}body{background:var(--bg);color:var(--text);font-family:Segoe UI,PingFang TC,Noto Sans TC,sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1.5rem}.bg-slide{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-2;background-size:cover;background-position:center;background-repeat:no-repeat}.bg-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;background:rgba(10,10,20,var(--bg-overlay-opacity))}#app-root{width:100%;max-width:580px}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:28px;font-weight:600;letter-spacing:-.5px;background:linear-gradient(135deg,#a89cf8,#7c6ff7,#5e5ce6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:6px}.header p{font-size:14px;color:var(--text2)}.card{background:var(--surface);border:.5px solid var(--border2);border-radius:var(--radius);padding:1.5rem;margin-bottom:1rem}.section-label{font-size:12px;color:var(--text2);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}.cat-grid{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:1.5rem}.cat-btn{border:.5px solid var(--border2);border-radius:20px;padding:6px 16px;font-size:13px;cursor:pointer;background:transparent;color:var(--text2);transition:all .15s}.cat-btn:hover{border-color:var(--accent);color:var(--accent-light)}.cat-btn.selected{background:var(--accent-bg);border-color:var(--accent);color:var(--accent-light);font-weight:500}.patch-row{display:flex;align-items:center;gap:10px;margin-bottom:1rem}.patch-label{font-size:12px;color:var(--text2);white-space:nowrap}.patch-select{flex:1;background:var(--surface2);border:.5px solid var(--border2);border-radius:var(--radius-sm);color:var(--text);font-size:13px;padding:6px 10px;cursor:pointer;outline:none;transition:border-color .15s}.patch-select:focus{border-color:var(--accent)}.spoiler-hint{background:#e05c5c14;border:.5px solid rgba(224,92,92,.3);border-radius:var(--radius-sm);padding:8px 12px;font-size:12px;color:#e07070;margin-bottom:1rem;line-height:1.6}.info-box{background:var(--accent-bg);border:.5px solid rgba(124,111,247,.25);border-radius:var(--radius-sm);padding:10px 14px;margin-bottom:1rem;font-size:12px;color:var(--text2);line-height:1.8}.info-box strong{color:var(--accent-light)}.start-btn{width:100%;padding:13px;border-radius:var(--radius-sm);border:none;background:var(--accent);color:#fff;font-size:15px;font-weight:500;cursor:pointer;transition:opacity .15s,transform .1s}.start-btn:hover{opacity:.88}.start-btn:active{transform:scale(.98)}.start-btn:disabled{opacity:.35;cursor:not-allowed}.lang-row{display:flex;justify-content:center;gap:6px;margin-bottom:1.25rem}.lang-btn{border:.5px solid var(--border2);border-radius:16px;padding:4px 12px;font-size:12px;cursor:pointer;background:transparent;color:var(--text2);transition:all .15s}.lang-btn:hover{border-color:var(--accent);color:var(--accent-light)}.lang-btn.active{background:var(--accent-bg);border-color:var(--accent);color:var(--accent-light);font-weight:500}.status-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.progress-txt{font-size:13px;color:var(--text2)}.score-txt{font-size:14px;font-weight:500;color:var(--accent-light)}.playing-badge{display:none;align-items:center;gap:7px;background:var(--accent-bg);border:.5px solid rgba(124,111,247,.3);border-radius:20px;padding:5px 14px;font-size:12px;color:var(--accent-light);margin-bottom:12px;font-weight:500}.playing-badge.visible{display:inline-flex}.dot{width:7px;height:7px;border-radius:50%;background:var(--accent-light);animation:pulse 1.2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.2}}.play-trigger{width:100%;padding:16px;border-radius:var(--radius-sm);border:.5px solid rgba(124,111,247,.4);background:var(--accent-bg);color:var(--accent-light);font-size:15px;font-weight:500;cursor:pointer;transition:all .15s;margin-bottom:1.25rem}.play-trigger:hover{background:#7c6ff733}.play-trigger.hidden{display:none}.countdown-bar-wrap{width:100%;height:3px;background:var(--border);border-radius:2px;margin-bottom:1.25rem;overflow:hidden}.countdown-bar{height:100%;background:var(--accent);border-radius:2px}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:1rem}.opt-btn{border:.5px solid var(--border2);border-radius:var(--radius-sm);padding:14px 12px;font-size:13px;cursor:pointer;background:var(--surface2);color:var(--text);text-align:left;transition:all .15s;line-height:1.5}.opt-btn:hover:not(:disabled){border-color:var(--accent);background:var(--accent-bg);color:var(--accent-light)}.opt-btn.correct{background:var(--correct-bg);border-color:var(--correct);color:var(--correct)}.opt-btn.wrong{background:var(--wrong-bg);border-color:var(--wrong);color:var(--wrong)}.opt-btn:disabled{cursor:default}.feedback{text-align:center;padding:11px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;margin-bottom:1rem}.feedback.correct{background:var(--correct-bg);color:var(--correct);border:.5px solid rgba(76,175,130,.3)}.feedback.wrong{background:var(--wrong-bg);color:var(--wrong);border:.5px solid rgba(224,92,92,.3)}.next-btn{width:100%;padding:12px;border-radius:var(--radius-sm);border:.5px solid var(--border2);background:var(--surface2);color:var(--text);font-size:14px;cursor:pointer;transition:all .15s}.next-btn:hover{border-color:var(--accent);color:var(--accent-light);background:var(--accent-bg)}.result-inner{text-align:center;padding:1.5rem 1rem}.result-emoji{font-size:48px;margin-bottom:1rem}.result-msg{font-size:20px;font-weight:600;margin-bottom:.5rem}.result-score{font-size:52px;font-weight:700;color:var(--accent-light);margin:.75rem 0 .25rem}.result-label{font-size:14px;color:var(--text2);margin-bottom:.75rem}.result-meta{display:flex;align-items:center;justify-content:center;gap:8px;font-size:13px;color:var(--text2);margin-bottom:1.75rem}.result-meta-sep{opacity:.4}.restart-btn{padding:12px 36px;border-radius:var(--radius-sm);border:none;background:var(--accent);color:#fff;font-size:14px;font-weight:500;cursor:pointer;transition:opacity .15s}.restart-btn:hover{opacity:.88}.review-list{margin-top:1.25rem;display:flex;flex-direction:column;gap:10px}.review-item{border:.5px solid var(--border2);border-radius:var(--radius-sm);padding:12px 14px;background:var(--surface2)}.review-item.correct-item{border-color:#4caf8259}.review-item.wrong-item{border-color:#e05c5c59}.review-item-header{display:flex;justify-content:space-between;align-items:center;gap:8px}.review-answer{font-size:13px;font-weight:500;color:var(--text);flex:1;line-height:1.4}.review-tag{font-size:11px;padding:2px 8px;border-radius:10px;white-space:nowrap;flex-shrink:0}.review-tag.correct{background:var(--correct-bg);color:var(--correct)}.review-tag.wrong{background:var(--wrong-bg);color:var(--wrong)}.replay-btn{margin-top:10px;width:100%;padding:7px;border-radius:var(--radius-sm);border:.5px solid var(--border2);background:transparent;color:var(--text2);font-size:12px;cursor:pointer;transition:all .15s;display:flex;align-items:center;justify-content:center;gap:6px}.replay-btn:hover,.replay-btn.playing{border-color:var(--accent);color:var(--accent-light);background:var(--accent-bg)}.review-bar-wrap{width:100%;height:2px;background:var(--border);border-radius:2px;margin-top:8px;overflow:hidden}.review-bar{height:100%;background:var(--accent);border-radius:2px;width:100%}.song-count-txt{text-align:center;font-size:12px;color:var(--text2);margin-top:.5rem}.copyright{text-align:center;padding:16px 0 4px;font-size:11px;color:var(--text2);line-height:1.6;opacity:.6;white-space:pre-line}@media (max-width: 480px){.options-grid{grid-template-columns:1fr}.header h1{font-size:24px}}