:root{--bg-base: #FFFFFF;--bg-soft: #F4FAFD;--bg-tint: #EAF4FB;--bg-card: #FFFFFF;--bg-glass: #FFFFFF;--bg-elev: #FFFFFF;--bg-hover: rgba(59, 130, 196, .08);--ink: #0E325A;--ink-soft: #16487F;--ink-muted: #4A6B8A;--ink-faint: #8FAFC7;--ink-invert: #FFFFFF;--c-sky-50: #EAF4FB;--c-sky-100: #D6ECF7;--c-sky-200: #A8D5F2;--c-sky-300: #7CBDE7;--c-sky-400: #6BA9DC;--c-sky-500: #3B82C4;--c-sky-600: #2B6CB0;--c-sky-700: #1E5BA8;--c-sky-800: #16487F;--c-sky-900: #0E325A;--c-silver-50: #E8F1F8;--c-silver-100: #C9D9E6;--c-silver-200: #8FAFC7;--c-cream: #FFF7E8;--c-warm: #F4E4C1;--c-gold: #E8C788;--c-bubble: rgba(255,255,255,.4);--line: rgba(168, 213, 242, .4);--line-soft: rgba(168, 213, 242, .22);--line-strong: #A8D5F2;--grad-primary: linear-gradient(135deg, #3B82C4 0%, #1E5BA8 100%);--grad-primary-h: linear-gradient(135deg, #2B6CB0 0%, #16487F 100%);--grad-soft: linear-gradient(135deg, #EAF4FB 0%, #D6ECF7 50%, #F4FAFD 100%);--grad-text: linear-gradient(135deg, #1E5BA8 0%, #3B82C4 50%, #6BA9DC 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.emoji{font-size:16px}.toggle-btn.active{color:#fff}.toggle-btn:not(.active):hover{color:var(--ink)}.step-block{margin-bottom:var(--sp-6)}.step-head{display:flex;align-items:flex-start;gap:var(--sp-3);margin-bottom:var(--sp-4)}.step-num{flex-shrink:0;display:grid;place-items:center;width:32px;height:32px;border-radius:var(--r-pill);background:var(--grad-pill);color:#fff;font-family:var(--font-display);font-weight:700;font-size:var(--fs-sm);box-shadow:var(--shadow-deep)}.step-text h3{font-size:var(--fs-lg);font-weight:600;margin-bottom:2px}.step-text p{font-size:var(--fs-sm);color:var(--ink-muted)}.custom-select-wrapper{position:relative;width:100%}.custom-select-trigger{width:100%;background:var(--bg-card);color:var(--ink);border:1px solid var(--line);border-radius:var(--r-md);padding:14px 44px 14px 18px;font-size:var(--fs-md);font-weight:500;cursor:pointer;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);box-shadow:var(--shadow-xs);display:flex;align-items:center;justify-content:space-between;-webkit-user-select:none;user-select:none}.custom-select-trigger:hover{border-color:var(--line-strong)}.custom-select-trigger:focus,.custom-select-wrapper.open .custom-select-trigger{border-color:var(--c-sky-500);box-shadow:0 0 0 4px #a8d5f259;outline:none}.custom-select-options{position:absolute;top:calc(100% + 8px);left:0;min-width:max-content;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-lg);z-index:100;opacity:0;visibility:hidden;transform:translateY(-8px);transition:all var(--dur) var(--ease);max-height:250px;overflow-y:auto}.custom-select-wrapper.open .custom-select-options{opacity:1;visibility:visible;transform:translateY(0)}.custom-option{padding:12px 18px;font-size:var(--fs-md);color:var(--ink);cursor:pointer;transition:background var(--dur) var(--ease);display:flex;align-items:center;justify-content:space-between;gap:16px;white-space:nowrap}.custom-option:hover{background:var(--bg-hover)}.custom-option.selected,[data-theme=dark] .custom-option.selected{background:var(--bg-card)}.model-item-left{display:flex;align-items:center;gap:12px}.model-icon{color:#f97316;display:flex;align-items:center;justify-content:center;flex-shrink:0}.model-item-text{display:flex;flex-direction:column;gap:2px}.model-item-title{font-weight:600;color:var(--ink);font-size:var(--fs-md)}.model-item-desc{font-size:var(--fs-sm);color:var(--ink-muted);font-weight:400}.model-radio{width:22px;height:22px;border-radius:50%;border:2px solid var(--ink-faint);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--dur) var(--ease)}.custom-option.selected .model-radio{border-color:#f97316;background:#f97316}.custom-option.selected .model-radio svg{display:block!important;color:#fff}.select-arrow{color:var(--ink-muted);transition:transform .2s ease}.custom-select-wrapper.open .select-arrow{transform:rotate(180deg)}.lang-select-wrapper{width:86px}.lang-select-trigger{padding:8px 10px;font-size:.875rem;font-weight:600;border-radius:var(--r-md);height:38px;box-shadow:none;background:var(--bg-soft);border:1px solid var(--line-soft);color:var(--ink-soft);transition:all var(--dur) var(--ease)}.lang-select-trigger:hover{background:var(--c-sky-50);color:var(--c-sky-700);border-color:var(--c-sky-200)}.lang-select-options{min-width:140px;width:auto;right:0;left:auto;top:calc(100% + 6px)}.lang-select-options .custom-option{padding:10px 14px;font-size:.875rem;font-weight:500}.dropzone{position:relative;display:flex;align-items:center;justify-content:center;min-height:220px;padding:var(--sp-8) var(--sp-6);border-radius:var(--r-2xl);background:var(--bg-card);border:2px dashed var(--line-strong);cursor:pointer;overflow:hidden;transition:all var(--dur) var(--ease)}.dropzone:hover,.dropzone:focus-visible{border-color:var(--c-sky-500);background:var(--c-sky-50);transform:translateY(-2px);box-shadow:var(--shadow-md)}.dropzone.dragover{border-color:var(--c-sky-700);background:var(--c-sky-100);transform:scale(1.01);box-shadow:var(--shadow-deep)}.dropzone.dragover .dropzone-icon{transform:translateY(-4px) scale(1.1)}.dropzone-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--grad-soft);opacity:0;transition:opacity var(--dur) var(--ease);pointer-events:none}.dropzone:hover .dropzone-bg{opacity:.5}.dropzone-content{position:relative;display:flex;flex-direction:column;align-items:center;gap:var(--sp-3);text-align:center}.dropzone-icon{display:grid;place-items:center;width:64px;height:64px;border-radius:var(--r-xl);background:var(--grad-primary);color:#fff;box-shadow:var(--shadow-glow);margin-bottom:var(--sp-2);transition:transform var(--dur) var(--ease)}.dropzone:hover .dropzone-icon{transform:translateY(-3px) rotate(-5deg)}.dropzone-title{font-size:var(--fs-md);color:var(--ink-soft)}.dropzone-title strong{color:var(--ink);font-weight:600}.dropzone-hint{font-size:var(--fs-xs);color:var(--ink-faint);letter-spacing:.02em}.file-name-display{display:none;margin-top:var(--sp-3);padding:12px 16px;background:var(--c-sky-50);color:var(--c-sky-800);border:1px solid var(--c-sky-200);border-radius:var(--r-md);font-size:var(--fs-sm);font-weight:500;text-align:center;word-break:break-all}.file-name-display:not(:empty){display:block}[data-theme=dark] .file-name-display{background:#a8d5f21a;color:var(--c-sky-200);border-color:#a8d5f240}.stepper-container{display:flex;justify-content:space-between;align-items:flex-start;margin:var(--sp-8) 0 var(--sp-4);position:relative;padding:0 var(--sp-3)}.stepper-track{position:absolute;top:18px;left:calc(var(--sp-3) + 18px);right:calc(var(--sp-3) + 18px);height:4px;border-radius:var(--r-pill);background:var(--line);overflow:hidden}.stepper-line{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--line)}.stepper-progress{position:absolute;top:0;left:0;height:100%;background:var(--grad-primary);width:0%;border-radius:var(--r-pill);transition:width var(--dur-slow) var(--ease);box-shadow:var(--shadow-glow)}.stepper-percentage{position:absolute;top:-28px;left:50%;transform:translate(-50%);padding:4px 10px;background:var(--ink);color:var(--ink-invert);font-size:var(--fs-xs);font-weight:700;border-radius:var(--r-pill);font-family:var(--font-mono);box-shadow:var(--shadow-md);z-index:5}.stepper-percentage:after{content:"";position:absolute;bottom:-4px;left:50%;transform:translate(-50%) rotate(45deg);width:8px;height:8px;background:var(--ink)}.step{display:flex;flex-direction:column;align-items:center;gap:var(--sp-2);z-index:2;position:relative;flex:0 0 auto}.step-circle{width:36px;height:36px;border-radius:50%;background:var(--bg-card);border:2px solid var(--line);display:grid;place-items:center;font-size:var(--fs-sm);font-weight:700;color:var(--ink-muted);font-family:var(--font-display);transition:all var(--dur) var(--ease)}.step.active .step-circle{border-color:var(--c-sky-500);color:var(--c-sky-700);background:var(--c-sky-50);box-shadow:0 0 0 6px #a8d5f24d;animation:step-pulse 1.6s ease-in-out infinite}.step.completed .step-circle{background:var(--grad-primary);border-color:transparent;color:#fff;box-shadow:var(--shadow-glow)}.step.completed .step-circle svg{stroke:#fff}.step-label{font-size:var(--fs-xs);font-weight:500;color:var(--ink-muted)}.step.active .step-label,.step.completed .step-label{color:var(--ink);font-weight:600}@keyframes step-pulse{0%,to{box-shadow:0 0 0 6px #a8d5f24d}50%{box-shadow:0 0 0 10px #a8d5f21a}}.result-panel{margin-top:var(--sp-8);padding:var(--sp-6);background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-2xl);box-shadow:var(--shadow-md);animation:fade-up var(--dur-slow) var(--ease)}@keyframes fade-up{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.result-head{display:flex;flex-direction:column;align-items:center;text-align:center;gap:var(--sp-2);margin-bottom:var(--sp-6)}.result-emoji{font-size:40px;animation:bounce-in .6s var(--ease-back)}@keyframes bounce-in{0%{transform:scale(0)}60%{transform:scale(1.2)}to{transform:scale(1)}}.result-head h3{font-size:var(--fs-xl);font-weight:700}.result-head p{color:var(--ink-muted);font-size:var(--fs-sm)}.preview-container{margin:var(--sp-6) 0;padding:var(--sp-6);background:var(--bg-base);border:1px solid var(--line);border-radius:var(--r-xl);display:flex;flex-direction:column;gap:var(--sp-5)}.video-preview-wrapper{width:100%;aspect-ratio:16/9;background:#000;border-radius:var(--r-md);overflow:hidden;margin-bottom:var(--sp-4)}#video-preview{width:100%;height:100%;object-fit:contain}.editor-container{display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-2xl);box-shadow:0 8px 24px #0e325a0a;overflow:hidden;margin-top:0;padding:40px 36px 36px;gap:40px}.editor-waveform-area{margin-top:var(--sp-4);margin-bottom:var(--sp-4)}.editor-header-bar{display:flex;justify-content:space-between;align-items:center;gap:var(--sp-5);flex-wrap:wrap}.editor-header-bar #editor-model-dropdown{flex:0 0 auto}.editor-header-bar #editor-model-dropdown .custom-select-wrapper{width:auto;min-width:0}.editor-header-bar .custom-select-trigger{padding:8px 36px 8px 12px;font-size:var(--fs-sm);font-weight:600;border-radius:var(--r-md)}.editor-header-bar .custom-select-trigger .select-arrow{width:12px;height:12px}.editor-waveform-area{position:relative;width:100%;background:#5551ff0d;border-radius:var(--r-xl);padding:16px}[data-theme=dark] .editor-waveform-area{background:#5551ff1a}#editor-model-dropdown{position:relative;z-index:10}.waveform-container{width:100%;height:120px;cursor:text;margin-bottom:4px}#timeline{width:100%;height:20px;font-family:var(--font-mono);font-size:10px;color:var(--ink-muted)}.editor-playback-bar{position:relative;display:flex;align-items:center;justify-content:center;padding:var(--sp-3) var(--sp-2) 0;margin-top:0;min-height:64px}.editor-view-toggles{display:flex;background:var(--bg-base);border-radius:var(--r-full);padding:4px}.pill-btn{background:transparent;border:none;border-radius:var(--r-full);padding:6px 16px;font-size:var(--fs-sm);font-weight:500;color:var(--ink-muted);cursor:pointer;transition:all var(--dur) var(--ease)}.pill-btn:hover{color:var(--ink)}.pill-btn.active{background:var(--line);color:var(--ink);font-weight:600}[data-theme=dark] .pill-btn.active{background:var(--bg-surface)}.editor-transport{display:flex;align-items:center;gap:16px;position:absolute;left:50%;transform:translate(-50%)}.transport-btn{background:transparent;border:none;color:var(--ink);cursor:pointer;display:grid;place-items:center;transition:transform var(--dur) var(--ease)}.transport-btn:hover{transform:scale(1.1)}.transport-btn.play-btn{width:48px;height:48px;border-radius:50%;background:var(--ink);color:var(--bg-base)}[data-theme=dark] .transport-btn.play-btn{background:var(--ink);color:var(--bg-base)}.transport-btn.play-btn:hover{transform:scale(1.05)}.time-display{position:absolute;right:var(--sp-2);top:50%;transform:translateY(-50%);font-family:var(--font-mono);font-size:var(--fs-sm);font-weight:600;color:var(--ink)}.editor-time-selection{display:flex;align-items:center;justify-content:center;gap:32px;padding:12px 0;border-bottom:1px solid var(--line)}.time-box{display:flex;align-items:center;gap:8px}.time-box label{font-size:var(--fs-sm);color:var(--ink-muted)}.time-box input{background:transparent;border:none;font-family:var(--font-mono);font-size:var(--fs-sm);font-weight:600;color:var(--ink);width:90px;text-align:center;outline:none}.time-box span{font-family:var(--font-mono);font-size:var(--fs-sm);font-weight:600;color:var(--ink)}.editor-toolbar{display:flex;align-items:center;gap:var(--sp-6)}.toolbar-sliders{display:flex;align-items:center;gap:var(--sp-8);flex:1;flex-wrap:wrap}.slider-container{flex:1 1 240px;min-width:220px;display:flex;flex-direction:column;gap:8px;background:transparent;padding:0;border:none;box-shadow:none;border-radius:0;transition:none}.slider-container:hover{border-color:transparent;box-shadow:none}.slider-container .range-slider{margin:0;width:100%}.slider-header{display:flex;align-items:center;gap:8px}.slider-icon{font-size:16px}.slider-label{flex:1;font-size:var(--fs-sm);font-weight:600;color:var(--ink)}.slider-value{font-size:var(--fs-sm);font-weight:600;font-family:var(--font-mono);color:var(--ink)}.toolbar-actions{display:flex;align-items:center;gap:12px}.action-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;width:80px;height:70px;background:var(--bg-base);border:1px solid var(--line);border-radius:var(--r-md);font-size:var(--fs-sm);font-weight:600;color:var(--ink);cursor:pointer;transition:all var(--dur) var(--ease)}.action-btn:hover{background:var(--bg-hover);border-color:var(--ink-faint)}.action-btn svg{color:var(--ink)}.range-slider{accent-color:#f97316}.range-slider::-webkit-slider-thumb{background:#f97316}.range-slider::-moz-range-thumb{background:#f97316}.slider-labels{display:flex;justify-content:space-between;font-size:var(--fs-xs);color:var(--ink-faint);padding:0 4px}.range-slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:8px;border-radius:var(--r-pill);background:var(--line);outline:none;cursor:pointer}.range-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:22px;height:22px;border-radius:50%;background:#fff;border:3px solid var(--c-sky-500);box-shadow:var(--shadow-md);cursor:pointer;transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}.range-slider::-webkit-slider-thumb:hover{transform:scale(1.15);box-shadow:var(--shadow-glow)}.range-slider::-webkit-slider-thumb:active{transform:scale(1.05)}.range-slider::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:3px solid var(--c-sky-500);box-shadow:var(--shadow-md);cursor:pointer}.download-links{display:flex;flex-direction:column;align-items:center;gap:var(--sp-3);margin-top:var(--sp-5);padding-top:var(--sp-5);border-top:1px solid var(--line)}.download-links:empty{display:none}.download-btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);padding:14px 36px;min-width:280px;max-width:100%;border-radius:var(--r-md);font-family:var(--font-body);font-weight:600;font-size:var(--fs-md);color:#fff;background:var(--grad-primary);box-shadow:var(--shadow-glow),inset 0 1px #ffffff4d;border:0;cursor:pointer;transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}.download-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-deep),inset 0 1px #fff6}.download-btn:active{transform:translateY(0) scale(.99)}.download-btn:nth-child(n+2){background:var(--bg-card);color:var(--c-sky-700);border:1px solid var(--c-sky-200);box-shadow:var(--shadow-xs)}.download-btn:nth-child(n+2):hover{background:var(--c-sky-50);border-color:var(--c-sky-300);box-shadow:var(--shadow-sm)}.how{padding:clamp(48px,6vw,80px) 0;background:linear-gradient(180deg,#f4fafd,#eaf4fb);border-top:1px solid var(--c-sky-100)}.how-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--sp-5)}.how-step{position:relative;padding:var(--sp-6);background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-2xl);box-shadow:var(--shadow-sm);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}.how-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.how-num{position:absolute;top:var(--sp-4);right:var(--sp-5);font-family:var(--font-display);font-weight:700;font-size:56px;letter-spacing:-.04em;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;opacity:.3;pointer-events:none}.how-icon{font-size:36px;margin-bottom:var(--sp-3)}.how-step h3{font-size:var(--fs-lg);font-weight:700;margin-bottom:var(--sp-2)}.how-step p{font-size:var(--fs-sm);color:var(--ink-muted);line-height:1.6}.footer{padding:var(--sp-10) 0 var(--sp-8);margin-top:0;background:linear-gradient(180deg,#1e5ba8,#0e325a);color:#ffffffeb;border-top:none}.footer .logo,.footer .logo-text{color:#fff}.footer .logo-text span{background:linear-gradient(135deg,#fff,#a8d5f2);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.footer .logo-mark{background:#fff3;box-shadow:0 0 0 1px #ffffff4d}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);flex-wrap:wrap}.footer-copy{font-size:var(--fs-sm);color:#ffffffbf}.toast{position:fixed;bottom:var(--sp-6);left:50%;transform:translate(-50%) translateY(120%);padding:12px 20px;background:var(--ink);color:var(--ink-invert);border-radius:var(--r-pill);font-size:var(--fs-sm);font-weight:500;box-shadow:var(--shadow-lg);z-index:1000;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);opacity:0;pointer-events:none;white-space:nowrap;max-width:90vw;overflow:hidden;text-overflow:ellipsis}.toast.show{transform:translate(-50%) translateY(0);opacity:1}.toast.success{background:var(--success)}.toast.error{background:var(--danger)}[data-theme=dark] .bg-noise{opacity:.08}.download-dropdown-wrapper{position:relative;display:inline-block}.dropdown-main-btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);background:var(--grad-primary);color:#fff;border:none;padding:14px 22px;border-radius:var(--r-md);font-family:var(--font-body);font-weight:600;font-size:var(--fs-md);cursor:pointer;transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);box-shadow:var(--shadow-glow),inset 0 1px #ffffff4d}.dropdown-main-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-deep),inset 0 1px #fff6}.download-dropdown-menu{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%) translateY(10px);background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:0 8px 32px #0000001a;padding:8px;display:flex;flex-direction:column;min-width:200px;opacity:0;visibility:hidden;transition:opacity .2s,transform .2s,visibility .2s;z-index:100}.download-dropdown-menu.open{opacity:1;visibility:visible;transform:translate(-50%) translateY(0)}.dropdown-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:transparent;border:none;width:100%;text-align:left;font-size:var(--fs-md);color:var(--ink);cursor:pointer;border-radius:var(--r-md);transition:background .2s;font-family:var(--font-body);font-weight:500}.dropdown-item:hover{background:var(--bg-hover)}.dropdown-item .icon{font-size:18px}.dropdown-divider{height:1px;background:var(--line);margin:8px 0}[data-theme=dark] .studio{background:linear-gradient(180deg,var(--bg-base) 0%,var(--bg-tint) 50%,var(--bg-base) 100%);border-top-color:var(--line-soft);border-bottom-color:var(--line-soft)}[data-theme=dark] .how{background:linear-gradient(180deg,var(--bg-tint) 0%,var(--bg-base) 100%);border-top-color:var(--line-soft)}[data-theme=dark] .how-step{background:var(--bg-card);border-color:var(--line);box-shadow:var(--shadow-sm)}[data-theme=dark] .how-step:hover{box-shadow:var(--shadow-lg);border-color:var(--line-strong)}[data-theme=dark] .how-step h3{color:var(--ink)}[data-theme=dark] .how-step p{color:var(--ink-muted)}[data-theme=dark] .how-num{opacity:.45}[data-theme=dark] .studio-card{background:var(--bg-card);border-color:var(--line);box-shadow:0 1px #ffffff0d inset,var(--shadow-lg),0 0 0 6px #a8d5f208}[data-theme=dark] .mode-toggle{background:var(--bg-soft);border-color:var(--line)}[data-theme=dark] .toggle-btn:not(.active):hover{color:var(--ink)}[data-theme=dark] .custom-select-trigger{background:var(--bg-soft);border-color:var(--line-soft)}[data-theme=dark] .custom-select-trigger:hover{border-color:var(--line-strong)}[data-theme=dark] .custom-select-trigger:focus,[data-theme=dark] .custom-select-wrapper.open .custom-select-trigger{border-color:var(--c-sky-400);box-shadow:0 0 0 4px #a8d5f226}[data-theme=dark] .custom-select-options{background:var(--bg-elev);border-color:var(--line)}[data-theme=dark] .custom-option:hover{background:var(--bg-hover)}[data-theme=dark] .lang-select-trigger{background:var(--bg-soft);border-color:var(--line-soft);color:var(--ink-soft)}[data-theme=dark] .lang-select-trigger:hover{background:var(--bg-hover);color:var(--c-sky-300);border-color:var(--line-strong)}[data-theme=dark] .dropzone{background:var(--bg-soft);border-color:var(--line-strong)}[data-theme=dark] .dropzone:hover,[data-theme=dark] .dropzone:focus-visible{background:var(--bg-elev);border-color:var(--c-sky-500)}[data-theme=dark] .dropzone.dragover{background:#a8d5f226;border-color:var(--c-sky-300)}[data-theme=dark] .step.active .step-circle{color:var(--c-sky-300);background:#a8d5f21a;border-color:var(--c-sky-400);box-shadow:0 0 0 6px #a8d5f21a}[data-theme=dark] .result-panel{background:var(--bg-soft);border-color:var(--line-soft)}body.locked{overflow:hidden!important;height:100vh!important;width:100%!important}.gate-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10000;background:#0a1628b3;backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);display:grid;place-items:center;padding:var(--sp-4);opacity:1;visibility:visible;transition:opacity var(--dur-slow) var(--ease),visibility var(--dur-slow) var(--ease)}[data-theme=light] .gate-overlay{background:#eaf4fbbf}.gate-overlay.fade-out{opacity:0;visibility:hidden;pointer-events:none}.gate-card{width:100%;max-width:440px;background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-3xl);padding:clamp(24px,6vw,44px) var(--sp-6);box-shadow:var(--shadow-xl),0 0 0 6px #a8d5f20d;position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;text-align:center;gap:var(--sp-5);animation:gate-pop var(--dur-slow) var(--ease-back)}.gate-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--grad-primary);pointer-events:none}@keyframes gate-pop{0%{transform:scale(.92) translateY(20px);opacity:0}to{transform:scale(1) translateY(0);opacity:1}}.gate-logo{font-family:var(--font-display);font-weight:800;font-size:var(--fs-2xl);color:var(--ink);letter-spacing:-.01em}.gate-logo span{color:var(--c-sky-500)}.gate-subtitle{color:var(--ink-soft);font-size:var(--fs-base);line-height:1.55;margin-top:calc(-1 * var(--sp-2))}.gate-input-wrapper{width:100%;display:flex;flex-direction:column;gap:8px;position:relative}.gate-input{width:100%;background:var(--bg-soft);border:1px solid var(--line-strong);border-radius:var(--r-md);padding:14px var(--sp-4);font-size:var(--fs-md);font-weight:700;text-align:center;color:var(--ink);letter-spacing:.05em;font-family:var(--font-mono);transition:all var(--dur) var(--ease)}.gate-input:focus{border-color:var(--c-sky-500);box-shadow:0 0 0 4px #a8d5f240;outline:none}.separator-container{display:flex;flex-direction:column;gap:24px;background:var(--bg-base);padding:24px;border-radius:var(--r-2xl);border:1px solid var(--line);box-shadow:0 8px 24px #0e325a0a;margin-top:var(--sp-4)}.sep-waveforms{display:flex;flex-direction:column;gap:16px;border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden}.sep-row{display:flex;align-items:stretch;background:var(--bg-card);border-bottom:1px solid var(--line)}.sep-row:last-child{border-bottom:none}.sep-controls{width:200px;padding:16px;border-right:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;gap:12px;background:var(--bg-base)}.sep-slider-header{display:flex;align-items:center;gap:8px}.sep-icon{font-size:16px}.sep-label{flex:1;font-size:var(--fs-sm);font-weight:600;color:var(--ink)}.sep-val{font-size:var(--fs-sm);font-family:var(--font-mono);font-weight:600;color:var(--ink)}.sep-waveform-box{flex:1;position:relative;min-width:0;padding:8px 16px}#waveform-music,#waveform-vocal{width:100%;height:80px}#timeline-separator{width:100%;height:20px;font-family:var(--font-mono);font-size:10px;color:var(--ink-muted)}.sep-toolbar{display:flex;align-items:center;justify-content:center;gap:24px}.sep-tool-box{display:flex;flex-direction:column;gap:12px;padding:16px 24px;background:var(--bg-base);border:1px solid var(--line);border-radius:var(--r-xl);min-width:240px}.sep-tool-header{display:flex;align-items:center;gap:8px}.gate-input.error{border-color:var(--danger)!important;color:var(--danger)!important;box-shadow:0 0 0 4px #ef444426!important;animation:shake .4s ease}@keyframes shake{0%,to{transform:translate(0)}15%,45%,75%{transform:translate(-6px)}30%,60%,90%{transform:translate(6px)}}.gate-err-msg{color:var(--danger);font-size:var(--fs-xs);font-weight:600;min-height:18px;opacity:0;transition:opacity var(--dur) var(--ease);line-height:1.2}.gate-err-msg.show{opacity:1}.gate-btn{width:100%;display:flex;justify-content:center;align-items:center}.gate-lang-switcher{display:flex;gap:6px;margin-bottom:calc(-1 * var(--sp-2))}.gate-lang-btn{background:var(--bg-soft);border:1px solid var(--line-soft);border-radius:var(--r-sm);padding:6px 12px;font-size:var(--fs-xs);font-weight:600;color:var(--ink-soft);cursor:pointer;transition:all var(--dur) var(--ease)}.gate-lang-btn:hover{background:var(--bg-hover);color:var(--ink)}.gate-lang-btn.active{background:var(--c-sky-100);color:var(--c-sky-700);border-color:var(--c-sky-200)}[data-theme=dark] .gate-lang-btn.active{background:#a8d5f226;color:var(--c-sky-300);border-color:#a8d5f24d}.gate-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;background:#0a192fd9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;padding:var(--sp-4);transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease)}.gate-overlay.hidden{opacity:0;visibility:hidden;pointer-events:none}.gate-box{background:#fff;border-radius:var(--r-2xl);padding:var(--sp-8);width:100%;max-width:440px;text-align:center;box-shadow:0 24px 64px #0a192f4d;border:1px solid var(--c-sky-200)}.gate-box h2{font-size:var(--fs-xl);margin-bottom:var(--sp-3);color:var(--ink)}.gate-box p{color:var(--ink-muted);font-size:var(--fs-sm);margin-bottom:var(--sp-6)}.gate-box input{width:100%;padding:14px 18px;border:1px solid var(--line);border-radius:var(--r-md);font-size:var(--fs-md);margin-bottom:var(--sp-4);outline:none;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);text-align:center;font-family:var(--font-mono)}.gate-box input:focus{border-color:var(--c-sky-500);box-shadow:0 0 0 4px #a8d5f259}.gate-box .btn{width:100%}.gate-error{color:#e53e3e;font-size:var(--fs-sm);margin-top:var(--sp-3);font-weight:500}@media (max-width: 900px){.nav-links{display:none}.hero-stats{gap:var(--sp-3);padding:var(--sp-3) var(--sp-4)}.hero-stats strong{font-size:var(--fs-md)}}@media (max-width: 640px){:root{--sp-6: 16px;--sp-8: 24px}.container{padding-inline:var(--sp-4)}.nav-inner{padding:var(--sp-2) var(--sp-4);gap:var(--sp-3)}.logo-text{font-size:var(--fs-md)}.logo-mark{width:32px;height:32px}.icon-btn{width:36px;height:36px}.btn-sm{padding:6px 12px;font-size:11px}.hero{padding:var(--sp-8) 0 var(--sp-4)}.hero-title{font-size:clamp(28px,8vw,40px)}.hero-sub br{display:none}.hero-cta{width:100%;flex-direction:column}.hero-cta .btn{width:100%}.hero-stats{gap:var(--sp-2);padding:var(--sp-3) var(--sp-4);width:100%;justify-content:space-around}.hero-stats strong{font-size:var(--fs-base)}.hero-stats span{font-size:10px}.hero-stats .divider{height:18px}.eq{height:60px;padding:var(--sp-3);gap:4px}.eq span{width:4px}.studio-card{padding:var(--sp-4);border-radius:var(--r-2xl)}.mode-toggle{max-width:100%}.toggle-btn{padding:10px 12px;font-size:var(--fs-xs)}.toggle-btn .label{font-size:12px}.step-head{gap:var(--sp-2)}.step-num{width:28px;height:28px;font-size:var(--fs-xs)}.step-text h3{font-size:var(--fs-base)}.step-text p{font-size:var(--fs-xs)}.dropzone{min-height:180px;padding:var(--sp-5) var(--sp-4)}.dropzone-icon{width:52px;height:52px}.dropzone-title{font-size:var(--fs-sm)}.dropzone-hint{font-size:11px}.stepper-container{margin:var(--sp-10) 0 var(--sp-3);padding:0}.stepper-track{left:22px;right:22px;top:16px}.step-circle{width:32px;height:32px;font-size:var(--fs-xs)}.step-label{font-size:10px}.stepper-percentage{font-size:10px;padding:3px 8px}.result-panel{padding:var(--sp-4)}.result-emoji{font-size:32px}.result-head h3{font-size:var(--fs-lg)}.preview-container,.editor-container{padding:var(--sp-4);gap:var(--sp-4)}.editor-header-bar{flex-direction:column;align-items:stretch;gap:var(--sp-3)}.editor-toolbar,.toolbar-sliders{flex-direction:column;align-items:stretch;gap:var(--sp-4)}.slider-container{flex:none;width:100%}.editor-playback-bar{flex-direction:column;gap:var(--sp-2);min-height:0;padding:var(--sp-2) 0 0}.editor-transport{position:static;transform:none;left:auto;justify-content:center}.time-display{position:static;transform:none;right:auto;text-align:center}.sep-row{flex-direction:column}.sep-controls{width:100%;border-right:none;border-bottom:1px solid var(--line);padding:12px 16px}.sep-waveform-box{padding:8px 16px}.sep-toolbar{flex-wrap:wrap;gap:16px}.sep-tool-box{min-width:100%;flex:1 1 100%}.player-controls{flex-wrap:wrap;gap:var(--sp-2)}.btn-play-pause{width:44px;height:44px}.waveform-container{width:100%;flex:1 1 100%;order:3;height:auto}.time-display{width:auto;margin:0 auto;font-size:11px;min-width:0}.adjust-controls{padding:var(--sp-4);gap:var(--sp-4)}.slider-value{min-width:48px;font-size:11px;padding:3px 8px}.download-btn{padding:12px 18px;font-size:var(--fs-sm)}.section-head{margin-bottom:var(--sp-6)}.section-head h2{font-size:clamp(24px,7vw,32px)}.how-steps{grid-template-columns:1fr;gap:var(--sp-3)}.how-step{padding:var(--sp-5)}.how-num{font-size:44px;top:var(--sp-3);right:var(--sp-4)}.footer-inner{flex-direction:column;text-align:center;gap:var(--sp-3)}.aurora .blob{filter:blur(60px);opacity:.4}.aurora .sparkle{display:none}}@media (max-width: 380px){.toggle-btn .emoji,.step-label{display:none}.stepper-track{left:16px;right:16px}.hero-stats{padding:var(--sp-2) var(--sp-3)}.hero-stats strong{font-size:var(--fs-sm)}}@media (max-height: 480px) and (orientation: landscape){.hero{padding:var(--sp-6) 0}.hero-visual{display:none}}@media (min-width: 1280px){.hero-title{font-size:80px}}@media (hover: none){.btn-primary:hover,.btn-ghost:hover,.feature-card:hover,.how-step:hover,.dropzone:hover{transform:none}}