:root{--bg-core: #070a12;--bg-surface: #0e1526;--bg-card: rgba(18, 26, 44, .75);--bg-card-hover: rgba(23, 34, 58, .85);--border-subtle: rgba(255, 255, 255, .08);--border-active: rgba(16, 185, 129, .45);--border-glow: rgba(16, 185, 129, .6);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--accent-emerald: #10b981;--accent-emerald-glow: rgba(16, 185, 129, .35);--accent-cyan: #06b6d4;--accent-cinnabar: #f43f5e;--accent-amber: #f59e0b;--font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-hanzi: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", system-ui, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 22px;--radius-xl: 32px;--shadow-card: 0 20px 40px -15px rgba(0, 0, 0, .6), 0 0 1px 1px rgba(255, 255, 255, .08);--shadow-glow: 0 0 30px -5px var(--accent-emerald-glow)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;min-height:100%;background-color:var(--bg-core);color:var(--text-primary);font-family:var(--font-main);-webkit-user-select:none;user-select:none;-webkit-font-smoothing:antialiased;overflow-x:hidden;touch-action:manipulation}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);border:0}.app-container{position:relative;width:100%;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;overflow-x:hidden;overflow-y:auto;-webkit-overflow-scrolling:touch}.ambient-glow{position:absolute;border-radius:50%;filter:blur(120px);pointer-events:none;z-index:0;opacity:.25}.glow-1{width:500px;height:500px;top:-150px;left:20%;background:radial-gradient(circle,#059669 0%,transparent 70%)}.glow-2{width:450px;height:450px;bottom:-100px;right:15%;background:radial-gradient(circle,#0284c7 0%,transparent 70%)}.app-header{position:relative;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:16px 36px;background:#0e152666;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--border-subtle)}.brand-group{display:flex;align-items:center;gap:14px}.brand-logo{width:44px;height:44px;border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px #10b98159;border:1px solid rgba(16,185,129,.4);background:var(--bg-surface)}.logo-img{width:100%;height:100%;object-fit:cover}.brand-title{font-size:20px;font-weight:700;letter-spacing:-.02em;color:#fff}.brand-sub{font-size:15px;font-weight:500;color:var(--accent-emerald)}.brand-badge{display:block;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted)}.header-controls{display:flex;align-items:center;gap:14px}.cyber-select{background:#0f172acc;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);padding:8px 14px;font-family:var(--font-main);font-size:13px;font-weight:500;outline:none;cursor:pointer;transition:all .2s ease}.cyber-select:hover,.cyber-select:focus{border-color:var(--border-active);box-shadow:0 0 10px #10b98133}.streak-pill{display:flex;align-items:center;gap:6px;background:#f59e0b1f;border:1px solid rgba(245,158,11,.35);border-radius:20px;padding:6px 14px}.streak-flame{font-size:16px;animation:flameWiggle 2s infinite ease-in-out}.streak-count{font-family:var(--font-mono);font-size:15px;font-weight:700;color:#fbbf24}.streak-label{font-size:10px;font-weight:800;letter-spacing:.08em;color:#f59e0b}@keyframes flameWiggle{0%,to{transform:scale(1) rotate(0)}50%{transform:scale(1.15) rotate(5deg)}}.icon-button{background:#ffffff0d;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-secondary);padding:8px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.icon-button:hover{background:#ffffff1a;color:var(--text-primary);border-color:var(--border-active)}.progress-bar-container{position:relative;z-index:5;width:100%;height:28px;background:#080c16b3;display:flex;align-items:center;border-bottom:1px solid var(--border-subtle)}.progress-bar-fill{position:absolute;top:0;left:0;height:100%;background:linear-gradient(90deg,#10b98140,#06b6d466);border-right:2px solid var(--accent-emerald);transition:width .4s cubic-bezier(.16,1,.3,1)}.progress-meta{position:relative;z-index:2;width:100%;display:flex;justify-content:space-between;padding:0 36px;font-size:11px;font-family:var(--font-mono);color:var(--text-muted)}.game-arena{position:relative;z-index:5;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px 24px;gap:16px;max-width:900px;margin:0 auto;width:100%}.glass-panel{background:var(--bg-card);backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);box-shadow:var(--shadow-card)}.card-stage{width:100%;perspective:1000px}.flashcard{width:100%;padding:24px 36px;display:flex;flex-direction:column;align-items:center;position:relative;transition:transform .3s cubic-bezier(.16,1,.3,1),box-shadow .3s ease,border-color .3s ease}.flashcard.success-glow{border-color:var(--accent-emerald);box-shadow:0 0 50px #10b98173;animation:successPulse .8s ease-out}.flashcard.fail-shake{border-color:var(--accent-cinnabar);animation:shake .4s ease-in-out}@keyframes successPulse{0%{transform:scale(.98)}50%{transform:scale(1.02)}to{transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-8px)}75%{transform:translate(8px)}}.card-header-bar{width:100%;display:flex;justify-content:space-between;align-items:center}.card-category-pill{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;padding:4px 12px;border-radius:12px;background:#10b9811f;color:var(--accent-emerald);border:1px solid rgba(16,185,129,.25)}.icon-action-btn{background:#ffffff0f;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-secondary);padding:6px 12px;display:flex;align-items:center;gap:6px;font-size:12px;font-weight:500;cursor:pointer;transition:all .2s}.icon-action-btn:hover{background:#10b98126;border-color:var(--border-active);color:var(--text-primary)}.card-body{display:flex;flex-direction:column;align-items:center;padding:12px 0;text-align:center}.hanzi-display{font-family:var(--font-hanzi);font-size:5rem;font-weight:800;line-height:1.15;color:#fff;letter-spacing:.05em;text-shadow:0 0 35px rgba(255,255,255,.12);transition:all .2s ease}.pinyin-display{font-size:1.85rem;font-weight:600;letter-spacing:.04em;color:var(--accent-emerald);margin-top:4px}.english-display{font-size:1.25rem;font-weight:400;color:var(--text-secondary);margin-top:6px}.example-box{display:none;margin-top:14px;padding:12px 20px;background:#0000004d;border-radius:var(--radius-md);border:1px solid var(--border-subtle);animation:fadeIn .2s ease}.example-box.show{display:block}.example-hanzi{font-family:var(--font-hanzi);font-size:1.15rem;color:#f1f5f9}.example-pinyin{font-size:.95rem;color:var(--accent-cyan);margin-top:2px}.example-english{font-size:.85rem;color:var(--text-muted);margin-top:2px}.card-footer-bar{display:flex;gap:12px;margin-top:8px}.text-toggle-btn{background:none;border:none;color:var(--text-muted);font-size:11px;cursor:pointer;text-decoration:underline;text-underline-offset:3px;transition:color .2s}.text-toggle-btn:hover{color:var(--text-secondary)}.visualizer-container{display:flex;flex-direction:column;align-items:center;width:100%;max-width:580px}.waveform-canvas{width:100%;height:60px;background:#0b112099;border-radius:var(--radius-md);border:1px solid var(--border-subtle)}.visualizer-label{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);margin-top:4px}.feedback-deck{display:flex;flex-direction:column;align-items:center;gap:8px;min-height:48px}.heard-pill{display:flex;align-items:center;gap:8px;padding:6px 18px;background:#0f172ab3;border:1px solid var(--border-subtle);border-radius:24px;font-size:14px}.heard-prefix{color:var(--text-muted);font-weight:500}.heard-text{font-weight:600;color:#e2e8f0}.score-badge{display:flex;align-items:center;gap:8px;padding:4px 14px;border-radius:20px;background:#10b98126;border:1px solid var(--accent-emerald);color:var(--accent-emerald);font-size:13px;font-weight:700;animation:fadeIn .3s ease}.score-badge.hidden{display:none}.controls-deck{display:flex;align-items:center;gap:24px}.control-btn{width:48px;height:48px;border-radius:50%;background:#ffffff0d;border:1px solid var(--border-subtle);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.control-btn:hover{background:#ffffff1f;color:var(--text-primary);border-color:var(--border-active);transform:translateY(-2px)}.mic-button-wrapper{display:flex;flex-direction:column;align-items:center;position:relative}.mic-primary-btn{position:relative;width:76px;height:76px;border-radius:50%;border:none;background:linear-gradient(135deg,#10b981,#059669);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 25px #10b98166;transition:all .25s cubic-bezier(.16,1,.3,1)}.mic-primary-btn:hover{transform:scale(1.06);box-shadow:0 12px 30px #10b98199}.mic-primary-btn.listening{background:linear-gradient(135deg,#f43f5e,#e11d48);box-shadow:0 8px 30px #f43f5e99;animation:pulseGlow 1.5s infinite}.mic-primary-btn.listening .mic-ripple-ring{position:absolute;top:-12px;left:-12px;right:-12px;bottom:-12px;border-radius:50%;border:2px solid rgba(244,63,94,.6);animation:rippleOut 1.5s infinite cubic-bezier(0,.2,.8,1)}@keyframes pulseGlow{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}@keyframes rippleOut{0%{transform:scale(.9);opacity:1}to{transform:scale(1.4);opacity:0}}.mic-hint{margin-top:8px;font-size:11px;color:var(--text-muted)}.mic-hint kbd{background:#ffffff1a;padding:1px 5px;border-radius:4px;font-family:var(--font-mono);font-size:10px;color:var(--text-primary)}.test-tray{width:100%;max-width:580px;background:#0e152666;border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:8px 14px;margin-top:4px}.test-tray-summary{font-size:12px;font-weight:500;color:var(--text-muted);cursor:pointer;outline:none}.test-tray-summary:hover{color:var(--text-secondary)}.test-tray-content{display:flex;flex-direction:column;gap:8px;margin-top:10px}.sim-row{display:flex;gap:8px}.cyber-input{flex:1;background:#080c16cc;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:#fff;padding:6px 12px;font-size:13px;outline:none}.cyber-input:focus{border-color:var(--border-active)}.action-btn-small{background:#ffffff14;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);padding:6px 12px;font-size:12px;font-weight:500;cursor:pointer;white-space:nowrap}.action-btn-small.accent{background:#10b98133;border-color:#10b98166;color:var(--accent-emerald)}.action-btn-small:hover{background:#ffffff26}.hotkey-legend{display:flex;gap:14px;font-size:11px;color:var(--text-muted)}.hotkey-legend kbd{background:#ffffff14;padding:1px 4px;border-radius:3px;color:var(--text-secondary)}.modal-backdrop{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000000b3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:100;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s ease}.modal-backdrop.hidden{display:none}.modal-card{width:90%;max-width:480px;padding:24px;display:flex;flex-direction:column;gap:18px}.modal-header{display:flex;justify-content:space-between;align-items:center}.modal-header h2{font-size:18px;font-weight:700}.close-modal-btn{background:none;border:none;color:var(--text-muted);font-size:24px;cursor:pointer}.close-modal-btn:hover{color:var(--text-primary)}.modal-body{display:flex;flex-direction:column;gap:18px}.setting-item{display:flex;flex-direction:column;gap:6px}.setting-label-row{display:flex;justify-content:space-between;align-items:center}.setting-label{font-size:13px;font-weight:600;color:var(--text-primary)}.setting-val-pill{font-family:var(--font-mono);font-size:12px;padding:2px 8px;border-radius:10px;background:#10b98126;color:var(--accent-emerald)}.setting-desc{font-size:11px;color:var(--text-muted);line-height:1.4}.cyber-range{width:100%;accent-color:var(--accent-emerald);cursor:pointer}.cyber-toggle{accent-color:var(--accent-emerald);width:18px;height:18px;cursor:pointer}.model-status-card{background:#0000004d;padding:12px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle)}.model-status-row{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500}.status-dot{width:8px;height:8px;border-radius:50%}.status-dot.green{background:var(--accent-emerald);box-shadow:0 0 8px var(--accent-emerald)}.model-info-note{font-size:11px;color:var(--text-muted);margin-top:4px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.model-loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100000;background:#070a12;display:flex;align-items:center;justify-content:center;transition:opacity .5s cubic-bezier(.16,1,.3,1),visibility .5s}.model-loading-overlay.hidden{opacity:0;visibility:hidden;pointer-events:none}.model-loading-card{max-width:480px;width:90%;text-align:center;padding:40px 32px;background:#0e1526e6;border:1px solid rgba(16,185,129,.35);border-radius:var(--radius-xl);box-shadow:0 25px 60px -15px #000c,0 0 50px -10px #10b98140;display:flex;flex-direction:column;align-items:center;gap:20px;animation:modalPop .4s cubic-bezier(.16,1,.3,1)}.loading-logo-box{position:relative;width:88px;height:88px;display:flex;align-items:center;justify-content:center}.loading-logo-img{width:80px;height:80px;border-radius:20px;box-shadow:0 0 30px #10b98166;animation:pulseAura 2.5s infinite ease-in-out}.loading-spinner-ring{position:absolute;top:-6px;right:-6px;bottom:-6px;left:-6px;border-radius:26px;border:2px solid transparent;border-top-color:var(--accent-emerald);border-right-color:var(--accent-cyan);animation:spinRing 2s linear infinite}@keyframes spinRing{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulseAura{0%,to{transform:scale(1);filter:brightness(1)}50%{transform:scale(1.04);filter:brightness(1.15) drop-shadow(0 0 25px rgba(16,185,129,.6))}}.loading-title{font-size:24px;font-weight:800;letter-spacing:-.5px;color:var(--text-primary);margin-top:4px}.loading-subtitle{font-size:13px;color:var(--accent-emerald);letter-spacing:1px;text-transform:uppercase;font-weight:700}.loading-progress-box{width:100%;display:flex;flex-direction:column;gap:10px}.loading-bar-track{width:100%;height:6px;background:#ffffff14;border-radius:3px;overflow:hidden;position:relative}.loading-bar-indeterminate{position:absolute;top:0;left:0;height:100%;width:45%;background:linear-gradient(90deg,transparent,var(--accent-emerald),var(--accent-cyan),transparent);animation:indeterminateBar 1.8s infinite ease-in-out}@keyframes indeterminateBar{0%{transform:translate(-100%)}to{transform:translate(350%)}}.loading-bar-determinate{position:absolute;top:0;left:0;height:100%;width:0%;background:linear-gradient(90deg,var(--accent-emerald),var(--accent-cyan));border-radius:3px;transition:width .2s ease-out}.loading-status-text{font-size:14px;color:var(--text-primary);font-weight:500;min-height:20px}.loading-footnote{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:6px}.loading-retry-btn{display:none;margin-top:8px;padding:8px 18px;background:var(--accent-cinnabar);color:#fff;border:none;border-radius:var(--radius-sm);font-weight:600;cursor:pointer;transition:opacity .2s}.loading-retry-btn:hover{opacity:.9}.engine-pill-active{display:flex;align-items:center;gap:10px;padding:10px 14px;background:#10b98114;border:1px solid rgba(16,185,129,.25);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px}.pill-tag{margin-left:auto;font-family:var(--font-mono);font-size:10px;font-weight:700;text-transform:uppercase;padding:2px 6px;border-radius:6px;background:var(--accent-emerald);color:#070a12}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ffffff2e;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#10b98173}*{scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.18) transparent}@media(max-width:768px){.app-header{padding:10px 14px}.brand-title{font-size:17px}.brand-sub{font-size:13px}.brand-badge,.streak-label{display:none}.category-dropdown-wrapper{max-width:140px}.game-arena{padding:12px 14px;gap:12px}.flashcard{padding:18px 20px}.hanzi-display{font-size:clamp(3rem,14vw,4.5rem)}.pinyin-display{font-size:clamp(1.25rem,5.5vw,1.65rem)}.english-display{font-size:clamp(1rem,4vw,1.2rem)}.progress-meta{padding:0 16px}.controls-deck{gap:16px}}@media(max-width:640px){.app-header{padding:8px 10px;gap:6px}.brand-group{gap:8px}.brand-logo{width:32px;height:32px;border-radius:8px}.brand-title{font-size:15px}.brand-sub{display:none}.header-controls{gap:5px}.category-dropdown-wrapper{max-width:110px}.cyber-select{padding:5px 6px;font-size:11px;width:100%;text-overflow:ellipsis}.streak-pill{padding:4px 7px;gap:3px}.streak-flame{font-size:13px}.streak-count{font-size:12px}.streak-label{display:none}.icon-button{padding:5px}.icon-button svg{width:17px;height:17px}.progress-bar-container{height:22px}.progress-meta{padding:0 10px;font-size:10px}.game-arena{padding:8px 10px 20px;gap:10px}.flashcard{padding:14px 12px;border-radius:var(--radius-lg)}.card-header-bar{margin-bottom:2px}.card-category-pill{font-size:10px;padding:3px 7px}.icon-action-btn{padding:4px 8px;font-size:11px;gap:4px}.icon-action-btn svg{width:15px;height:15px}.card-body{padding:6px 0}.hanzi-display{font-size:clamp(2.6rem,13vw,3.6rem)}.pinyin-display{font-size:clamp(1.1rem,5vw,1.4rem);margin-top:2px}.english-display{font-size:clamp(.9rem,3.8vw,1.1rem);margin-top:3px}.example-box{margin-top:8px;padding:6px 10px}.example-hanzi{font-size:12px}.example-pinyin,.example-english{font-size:10.5px}.card-footer-bar{gap:6px;flex-wrap:wrap;justify-content:center}.text-toggle-btn{font-size:10px;padding:3px 7px}.waveform-canvas{height:36px}.visualizer-label{font-size:10px}.feedback-deck{min-height:36px;gap:4px}.heard-pill{padding:3px 10px;font-size:11.5px}.controls-deck{gap:12px}.control-btn{width:40px;height:40px}.control-btn svg{width:17px;height:17px}.mic-primary-btn{width:62px;height:62px}.mic-icon{width:22px;height:22px}.mic-hint{font-size:9.5px;margin-top:3px}.test-tray{width:100%}.sim-row{flex-direction:column;gap:6px}.sim-row .action-btn-small{width:100%}.modal-card{width:96%;max-height:88vh;padding:18px 14px}.model-loading-card{width:92%;padding:24px 16px;gap:12px}.loading-logo-box{width:64px;height:64px}.loading-logo-img{width:56px;height:56px}.loading-title{font-size:19px}.loading-subtitle{font-size:10.5px}}@media(max-height:720px){.app-header{padding:6px 12px}.game-arena{padding:6px 12px 16px;gap:6px}.flashcard{padding:10px 14px}.card-body{padding:2px 0}.hanzi-display{font-size:clamp(2.3rem,7.5vh,3.2rem)}.pinyin-display{font-size:1.15rem;margin-top:1px}.english-display{font-size:.9rem;margin-top:1px}.waveform-canvas{height:28px}.mic-primary-btn{width:54px;height:54px}.control-btn{width:36px;height:36px}.controls-deck{gap:10px}}