:root{--bg-primary: #070a12;--bg-secondary: #0d1222;--bg-tertiary: #131b31;--bg-card: rgba(18, 26, 47, .72);--bg-card-hover: rgba(26, 37, 65, .85);--bg-elevated: rgba(30, 42, 74, .65);--border-subtle: rgba(255, 255, 255, .08);--border-glow: rgba(6, 182, 212, .35);--border-focus: #06b6d4;--glass-blur: blur(16px);--glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, .37);--accent-cyan: #06b6d4;--accent-cyan-light: #67e8f9;--accent-cyan-glow: rgba(6, 182, 212, .25);--accent-purple: #8b5cf6;--accent-purple-light: #c084fc;--accent-purple-glow: rgba(139, 92, 246, .25);--accent-gradient: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #ec4899 100%);--accent-gradient-cyan: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);--accent-gradient-gold: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);--status-good: #10b981;--status-good-bg: rgba(16, 185, 129, .15);--status-warning: #f59e0b;--status-warning-bg: rgba(245, 158, 11, .15);--status-error: #f43f5e;--status-error-bg: rgba(244, 63, 94, .15);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--text-highlight: #38bdf8;--font-main: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-phonetic: "Fira Code", "Courier New", monospace;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-full: 9999px;--transition-fast: .18s cubic-bezier(.4, 0, .2, 1);--transition-smooth: .3s cubic-bezier(.4, 0, .2, 1);--transition-bounce: .5s cubic-bezier(.34, 1.56, .64, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}html,body{width:100%;min-height:100%;background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-main);font-size:16px;line-height:1.5;overflow-x:hidden;letter-spacing:-.01em}body{background-image:radial-gradient(circle at 15% 15%,rgba(6,182,212,.12) 0%,transparent 40%),radial-gradient(circle at 85% 25%,rgba(139,92,246,.14) 0%,transparent 45%),radial-gradient(circle at 50% 80%,rgba(59,130,246,.08) 0%,transparent 50%);background-attachment:fixed;padding-bottom:env(safe-area-inset-bottom,24px)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:#ffffff2e;border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--accent-cyan)}.app-container{max-width:1280px;margin:0 auto;padding:14px 20px 24px;min-height:100vh;display:flex;flex-direction:column}@media(max-width:768px){.app-container{padding:10px 14px 80px}}.glass-panel{background:var(--bg-card);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--glass-shadow);transition:all var(--transition-smooth)}.glass-panel:hover{border-color:#ffffff24}.glass-card-interactive{cursor:pointer;transition:transform var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast)}.glass-card-interactive:hover{transform:translateY(-2px);border-color:var(--border-glow);box-shadow:0 12px 36px #06b6d426}.app-header{display:flex;align-items:center;justify-content:space-between;padding:14px 22px;margin-bottom:20px;position:sticky;top:12px;z-index:50;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#0d1222d9;border:1px solid var(--border-subtle);border-radius:var(--radius-lg)}.logo-group{display:flex;align-items:center;gap:12px;cursor:pointer}.logo-icon-wrapper{width:42px;height:42px;border-radius:12px;background:var(--accent-gradient);display:flex;align-items:center;justify-content:center;box-shadow:0 0 20px var(--accent-cyan-glow);position:relative;overflow:hidden}.logo-title{font-size:1.28rem;font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,#fff 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#06b6d459;opacity:1}.sentence-index{position:absolute;top:12px;right:16px;font-size:.75rem;font-weight:700;color:var(--text-muted);font-family:var(--font-phonetic)}.sentence-english{font-size:1.18rem;font-weight:600;line-height:1.6;color:#fff;margin-bottom:6px;display:flex;flex-wrap:wrap;gap:6px}.clickable-word{display:inline-block;padding:1px 4px;border-radius:4px;transition:all .15s ease;position:relative}.clickable-word:hover{background:#06b6d440;color:var(--accent-cyan-light);transform:translateY(-1px)}.word-status-good{color:#34d399;border-bottom:2px solid #10b981}.word-status-warning{color:#fbbf24;border-bottom:2px solid #f59e0b}.word-status-error{color:#fb7185;border-bottom:2px solid #f43f5e}.sentence-ipa{font-family:var(--font-phonetic);font-size:.88rem;color:var(--accent-cyan-light);margin-bottom:6px;opacity:.88;letter-spacing:.03em}.sentence-chinese{font-size:.94rem;color:var(--text-secondary);line-height:1.5}.blind-mode-blur{filter:blur(8px);-webkit-user-select:none;user-select:none;transition:filter .3s ease}.blind-mode-blur:hover{filter:blur(0px)}.studio-deck{padding:8px 14px;margin:8px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:nowrap;gap:8px;background:#0e1424eb;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(6,182,212,.28);border-radius:var(--radius-lg);box-shadow:0 4px 20px #00000073;transition:all var(--transition-smooth)}.ai-btn-text-short{display:none}@media(max-width:1200px){.control-label-text{display:none}}@media(max-width:1100px){.ai-btn-text-full{display:none}.ai-btn-text-short{display:inline}}.record-btn-wrapper{position:relative;display:flex;align-items:center;justify-content:center}.record-btn{width:64px;height:64px;border-radius:50%;background:var(--status-error);color:#fff;border:4px solid rgba(244,63,94,.3);box-shadow:0 0 24px #f43f5e73;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast);position:relative}.record-btn:hover{transform:scale(1.06);box-shadow:0 0 32px #f43f5ea6}.record-btn.recording{background:#fff;color:var(--status-error);animation:pulse-ring 1.5s infinite}@keyframes pulse-ring{0%{box-shadow:0 0 #f43f5e99,0 0 20px #f43f5e80}70%{box-shadow:0 0 0 16px #f43f5e00,0 0 30px #f43f5ecc}to{box-shadow:0 0 #f43f5e00,0 0 20px #f43f5e80}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#04070ec7;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:100;display:flex;align-items:center;justify-content:center;padding:16px;animation:fadeIn .2s ease}.modal-content{width:100%;max-width:520px;background:#0d1324;border:1px solid var(--border-glow);border-radius:var(--radius-lg);padding:26px;box-shadow:0 20px 50px #0009;position:relative;max-height:90vh;overflow-y:auto}@keyframes fadeIn{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.card-scene{perspective:1000px;width:100%;height:280px;margin:16px 0}.flashcard-3d{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);cursor:pointer}.flashcard-3d.flipped{transform:rotateY(180deg)}.card-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--radius-lg);padding:28px;display:flex;flex-direction:column;justify-content:space-between;border:1px solid var(--border-subtle);background:linear-gradient(135deg,#141d35e6,#0d1324f2);box-shadow:var(--glass-shadow)}.card-face-back{transform:rotateY(180deg);border-color:#8b5cf666}.mobile-nav-bar{display:none;position:fixed;bottom:0;left:0;right:0;height:64px;background:#0b101ef0;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:1px solid var(--border-subtle);z-index:60;padding:0 16px;padding-bottom:env(safe-area-inset-bottom,0px)}@media(max-width:768px){.mobile-nav-bar{display:flex;align-items:center;justify-content:space-around}.subtitles-container{height:calc(100vh - 420px);min-height:320px}.subtitles-container:after{min-height:calc(100vh - 450px)}.studio-deck{flex-wrap:wrap;justify-content:center;gap:8px;padding:8px 10px}}.training-mode-bar{display:flex;align-items:center;justify-content:space-between;padding:6px 12px;margin-bottom:12px;gap:8px}.mode-pill-btn{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle);background:#ffffff0a;color:var(--text-secondary);font-size:.78rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.mode-pill-btn:hover{background:#ffffff14;color:#fff}.mode-pill-btn.active{background:var(--accent-gradient-cyan);border-color:transparent;color:#fff;box-shadow:0 0 14px var(--accent-cyan-glow)}.mode-sop-badge{font-size:.58rem;padding:1px 5px;border-radius:4px;background:#ec489959;color:#f472b6;font-weight:800;letter-spacing:.04em}.mode-commute-trigger{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--radius-sm);border:1px solid rgba(56,189,248,.35);background:#38bdf81a;color:var(--accent-cyan-light);font-size:.78rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.mode-commute-trigger:hover{background:#38bdf833;border-color:var(--accent-cyan)}.guided-flow-container{display:flex;flex-direction:column;gap:14px;padding:18px;margin-bottom:20px;border:1px solid var(--border-glow);box-shadow:0 8px 32px #06b6d41f}.guided-top-bar{display:flex;align-items:center;justify-content:space-between;padding-bottom:12px;border-bottom:1px solid var(--border-subtle)}.guided-tag-badge{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:6px;background:linear-gradient(135deg,#06b6d433,#8b5cf640);border:1px solid rgba(6,182,212,.4);color:var(--accent-cyan-light);font-size:.74rem;font-weight:700}.guided-steps-nav{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}@media(max-width:640px){.guided-steps-nav{grid-template-columns:repeat(2,1fr)}}.guided-step-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:#ffffff08;color:var(--text-secondary);cursor:pointer;text-align:left;transition:all var(--transition-fast)}.guided-step-item:hover{background:#ffffff0f}.guided-step-item.active{background:#06b6d41f;border-color:var(--accent-cyan);box-shadow:0 0 16px #06b6d433}.guided-step-item.done{border-color:#10b98159}.step-circle{width:28px;height:28px;border-radius:50%;background:#ffffff14;display:flex;align-items:center;justify-content:center;font-size:.82rem;font-weight:800;color:var(--text-muted);flex-shrink:0}.guided-step-item.active .step-circle{background:var(--accent-cyan);color:#fff}.guided-step-item.done .step-circle{background:#10b98126;color:var(--status-good)}.step-labels{display:flex;flex-direction:column;min-width:0}.step-title{font-size:.82rem;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.step-sub{font-size:.68rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.guided-stage-card{background:#0b102099;border-radius:var(--radius-md);border:1px solid var(--border-subtle);padding:20px}.stage-header{display:flex;align-items:center;gap:14px;margin-bottom:18px}.stage-icon-wrap{width:46px;height:46px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;flex-shrink:0}.stage-action-row{display:flex;align-items:center;gap:12px;margin-top:20px;flex-wrap:wrap}.blind-subtitle-box{background:#00000059;border-radius:var(--radius-md);border:1px solid rgba(255,255,255,.06);padding:24px;text-align:center;position:relative}.blind-text-wrap{transition:all .35s ease}.blind-text-wrap.blurred{filter:blur(10px);-webkit-user-select:none;user-select:none;opacity:.6}.blind-text-wrap.revealed{filter:none;opacity:1}.blind-en{font-size:1.25rem;font-weight:700;color:#fff;line-height:1.5;margin-bottom:8px}.blind-zh{font-size:.9rem;color:var(--text-secondary)}.blind-actions{display:flex;justify-content:center;margin-top:14px}.deconstruct-card{background:#0000004d;border-radius:var(--radius-md);padding:20px;border:1px solid rgba(255,255,255,.06)}.deconstruct-words-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.deconstruct-word{display:inline-flex;flex-direction:column;align-items:center;padding:5px 10px;border-radius:6px;background:#ffffff0d;border:1px solid var(--border-subtle);cursor:pointer;transition:all var(--transition-fast)}.deconstruct-word:hover{background:#06b6d426;border-color:var(--accent-cyan);transform:translateY(-1px)}.word-txt{font-size:1.05rem;font-weight:700;color:#fff}.word-ipa{font-size:.72rem;color:var(--accent-cyan-light);font-family:var(--font-phonetic);margin-top:2px}.deconstruct-zh{font-size:.88rem;color:var(--text-secondary);padding-top:10px;border-top:1px solid var(--border-subtle)}.deconstruct-tip{margin-top:12px;padding:10px 14px;border-radius:var(--radius-sm);background:#8b5cf61a;border:1px solid rgba(139,92,246,.25);display:flex;align-items:flex-start;gap:10px}.tip-badge{font-size:.68rem;padding:2px 6px;border-radius:4px;background:var(--accent-purple);color:#fff;font-weight:700;white-space:nowrap}.deconstruct-tip p{font-size:.8rem;color:#e2e8f0;margin:0;line-height:1.4}.shadowing-prominent-card{background:#0006;border-radius:var(--radius-md);padding:24px;text-align:center;border:1px solid rgba(139,92,246,.25)}.shadowing-en-lead{font-size:1.35rem;font-weight:800;color:#fff;line-height:1.45;margin-bottom:8px}.shadowing-ipa-lead{font-size:.88rem;color:var(--accent-purple-light);font-family:var(--font-phonetic)}.mic-live-meter{margin-top:18px;padding:12px;border-radius:var(--radius-sm);background:#ffffff0a;border:1px solid var(--border-subtle)}.meter-header{display:flex;align-items:center;justify-content:center;gap:8px;font-size:.78rem;color:var(--text-secondary);margin-bottom:8px}.live-dot{width:8px;height:8px;border-radius:50%;background:var(--status-error)}.meter-track{width:100%;height:6px;background:#ffffff14;border-radius:3px;overflow:hidden}.meter-bar{height:100%;transition:width .08s ease}.solo-record-card{background:#00000059;border-radius:var(--radius-md);padding:20px;border:1px solid rgba(16,185,129,.25);text-align:center}.solo-en{font-size:1.25rem;font-weight:700;color:#fff;line-height:1.4;margin-bottom:6px}.solo-zh{font-size:.86rem;color:var(--text-muted)}.evaluation-result-card{margin-top:18px;padding:18px;border-radius:var(--radius-md);text-align:left}.evaluation-result-card.passed{background:#10b9811f;border:1px solid var(--status-good)}.evaluation-result-card.needs-work{background:#f59e0b1f;border:1px solid var(--status-warning)}.eval-result-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.eval-score-num{font-size:2.2rem;font-weight:900;font-family:var(--font-phonetic);color:var(--status-good);line-height:1}.evaluation-result-card.needs-work .eval-score-num{color:var(--status-warning)}.eval-words-feedback{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.eval-pill{padding:3px 8px;border-radius:4px;font-size:.74rem;font-weight:600}.eval-pill.good{background:#10b98133;color:#34d399;border:1px solid rgba(16,185,129,.4)}.eval-pill.warning{background:#f59e0b33;color:#fbbf24;border:1px solid rgba(245,158,11,.4)}.eval-pill.error{background:#f43f5e33;color:#fb7185;border:1px solid rgba(244,63,94,.4)}.commute-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000;color:#f8fafc;z-index:99999;display:flex;flex-direction:column;justify-content:space-between;-webkit-user-select:none;user-select:none;overflow:hidden}.commute-top-nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:#000c;border-bottom:1px solid rgba(255,255,255,.08)}.commute-logo-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:#38bdf826;border:1px solid rgba(56,189,248,.35);color:var(--accent-cyan-light);font-size:.78rem;font-weight:700}.commute-icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.12);background:#ffffff0f;color:#cbd5e1;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.commute-icon-btn:hover{background:#ffffff26;color:#fff}.commute-icon-btn.close:hover{background:#f43f5e33;border-color:var(--status-error);color:#fff}.commute-center-stage{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;cursor:pointer;text-align:center}.commute-sentence-counter{font-size:1rem;font-weight:800;letter-spacing:.1em;color:#94a3b8;display:flex;align-items:center;gap:6px;margin-bottom:24px;padding:6px 16px;border-radius:999px;background:#ffffff0d;border:1px solid rgba(255,255,255,.1)}.commute-breathing-ring-wrapper{margin-bottom:28px}.commute-breathing-ring{width:120px;height:120px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#ffffff08;border:2px solid rgba(255,255,255,.15);transition:all .3s ease}.commute-breathing-ring.native{border-color:var(--accent-cyan);box-shadow:0 0 35px #06b6d480,inset 0 0 20px #06b6d433;color:var(--accent-cyan-light);animation:breathe-glow 2s infinite ease-in-out}.commute-breathing-ring.shadowing{border-color:var(--accent-purple);box-shadow:0 0 45px #8b5cf699,inset 0 0 25px #8b5cf64d;color:var(--accent-purple-light);animation:breathe-glow 1.2s infinite ease-in-out}.commute-breathing-ring.replay{border-color:#ec4899;box-shadow:0 0 35px #ec489980,inset 0 0 20px #ec489933;color:#f472b6}.commute-breathing-ring.transition{border-color:var(--status-good);box-shadow:0 0 30px #10b98166;color:var(--status-good)}.commute-breathing-ring.idle{border-color:#fff3;color:#94a3b8}@keyframes breathe-glow{0%,to{transform:scale(1);opacity:.9}50%{transform:scale(1.08);opacity:1}}.commute-phase-label{margin-bottom:20px}.phase-title{font-size:1.4rem;font-weight:800;margin:0}.text-cyan{color:var(--accent-cyan-light)}.text-purple{color:var(--accent-purple-light)}.text-pink{color:#f472b6}.text-emerald{color:var(--status-good)}.text-slate{color:#94a3b8}.countdown-pill{display:inline-block;margin-top:8px;font-size:1rem;color:#cbd5e1;padding:4px 14px;border-radius:999px;background:#8b5cf633;border:1px solid rgba(139,92,246,.4)}.countdown-number{font-weight:900;font-family:var(--font-phonetic);color:var(--accent-purple-light);font-size:1.2rem;margin-left:4px}.commute-text-display{max-width:720px;margin-top:10px;padding:0 16px}.commute-en{font-size:1.5rem;font-weight:700;line-height:1.4;color:#fff;margin-bottom:10px}.commute-zh{font-size:1rem;color:#94a3b8;line-height:1.5}.commute-bottom-controls{display:flex;align-items:center;justify-content:center;gap:24px;padding:20px 24px 36px;background:#000000d9;border-top:1px solid rgba(255,255,255,.08)}.commute-ctrl-btn{width:52px;height:52px;border-radius:50%;border:1px solid rgba(255,255,255,.15);background:#ffffff0f;color:#cbd5e1;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.commute-ctrl-btn:hover{background:#ffffff26;color:#fff;transform:scale(1.05)}.commute-main-play-btn{width:76px;height:76px;border-radius:50%;border:none;background:var(--accent-gradient-cyan);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 0 25px var(--accent-cyan-glow);transition:all var(--transition-bounce)}.commute-main-play-btn:hover{transform:scale(1.06);box-shadow:0 0 35px var(--accent-cyan-glow)}.commute-main-play-btn.playing{background:linear-gradient(135deg,#ec4899,#8b5cf6);box-shadow:0 0 30px #ec489966}.commute-settings-drawer{position:absolute;bottom:110px;left:50%;transform:translate(-50%);width:90%;max-width:420px;background:#121826f5;-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);border:1px solid rgba(255,255,255,.15);border-radius:var(--radius-lg);padding:20px;box-shadow:0 12px 40px #000c;z-index:10}.setting-item{margin-bottom:14px}.setting-item label{font-size:.82rem;color:#cbd5e1;font-weight:600}.setting-chip{padding:4px 12px;border-radius:6px;border:1px solid rgba(255,255,255,.12);background:#ffffff0d;color:var(--text-secondary);font-size:.8rem;font-weight:700;cursor:pointer;transition:all var(--transition-fast)}.setting-chip.active{background:var(--accent-cyan);border-color:var(--accent-cyan);color:#fff}.switch-toggle{width:44px;height:24px;border-radius:12px;background:#ffffff26;border:none;cursor:pointer;position:relative;transition:background .2s}.switch-toggle.on{background:var(--accent-cyan)}.switch-dot{width:18px;height:18px;border-radius:50%;background:#fff;position:absolute;top:3px;left:3px;transition:transform .2s}.switch-toggle.on .switch-dot{transform:translate(20px)}