:root{--bg-base: #0f1117;--bg-surface: #1a1d27;--bg-card: #21263a;--bg-input: #2a2f45;--bg-hover: #2f3550;--accent: #7c6ff7;--accent-hover: #9d93ff;--accent-dim: rgba(124, 111, 247, .15);--accent-border: rgba(124, 111, 247, .3);--success: #4ade80;--success-dim: rgba(74, 222, 128, .12);--warning: #fbbf24;--danger: #f87171;--text-primary: #f0f2ff;--text-secondary: #8b92b8;--text-muted: #545c7e;--border: rgba(255, 255, 255, .07);--border-hover: rgba(255, 255, 255, .14);--border-accent: rgba(124, 111, 247, .4);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 20px;--radius-full: 9999px;--shadow-card: 0 2px 20px rgba(0, 0, 0, .4);--shadow-accent: 0 0 20px rgba(124, 111, 247, .2)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:15px;scroll-behavior:smooth}body{font-family:Inter,system-ui,-apple-system,sans-serif;font-size:15px;line-height:1.6;color:var(--text-primary);background-color:var(--bg-base);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;color:var(--text-primary)}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.1rem}p{color:var(--text-secondary);line-height:1.7}a{color:var(--accent);text-decoration:none;transition:color .15s ease}a:hover{color:var(--accent-hover)}ul,ol{list-style:none}img,svg{display:block;max-width:100%}button{cursor:pointer;font-family:inherit;font-size:inherit}input,select,textarea{font-family:inherit;font-size:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}::selection{background:var(--accent-dim);color:var(--text-primary)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.5rem}.text-primary{color:var(--text-primary)}.text-secondary{color:var(--text-secondary)}.text-muted{color:var(--text-muted)}.text-accent{color:var(--accent)}.text-success{color:var(--success)}.text-warning{color:var(--warning)}.text-danger{color:var(--danger)}.font-medium{font-weight:500}.font-semibold{font-weight:600}.hidden{display:none!important}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:12px 28px;border-radius:var(--radius-md);font-size:15px;font-weight:500;line-height:1;border:none;cursor:pointer;text-decoration:none;transition:all .15s ease;white-space:nowrap;user-select:none}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-accent);color:#fff}.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border-hover)}.btn-ghost:hover:not(:disabled){background:var(--bg-hover);color:var(--text-primary);transform:translateY(-1px)}.btn-success{background:var(--success);color:#0f1117}.btn-success:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:8px 16px;font-size:13px}.btn-lg{padding:16px 36px;font-size:16px;border-radius:var(--radius-lg)}.btn-icon{padding:10px;border-radius:var(--radius-sm)}.btn-full{width:100%}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}.card-hover{transition:all .2s ease}.card-hover:hover{border-color:var(--border-hover);transform:translateY(-2px);box-shadow:var(--shadow-card)}.form-group{display:flex;flex-direction:column;gap:.3rem}.form-label{font-size:13px;font-weight:500;color:var(--text-secondary);display:flex;align-items:center;justify-content:space-between}.form-label-value{font-weight:600;color:var(--text-primary);font-variant-numeric:tabular-nums}.form-help{font-size:12px;color:var(--text-muted)}.input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);padding:10px 14px;width:100%;transition:border-color .15s ease,box-shadow .15s ease}.input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-dim)}.input::placeholder{color:var(--text-muted)}.select{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);padding:10px 36px 10px 14px;width:100%;cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b92b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;transition:border-color .15s ease,box-shadow .15s ease}.select:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-dim)}.textarea{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);padding:10px 14px;width:100%;resize:vertical;min-height:100px;transition:border-color .15s ease,box-shadow .15s ease}.textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-dim)}.slider{width:100%;height:34px;display:flex;align-items:center;cursor:pointer;-webkit-appearance:none;appearance:none;background:transparent}.slider::-webkit-slider-runnable-track{height:4px;background:var(--bg-hover);border-radius:2px}.slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent);margin-top:-6px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.slider::-webkit-slider-thumb:hover{transform:scale(1.2);box-shadow:0 0 0 4px var(--accent-dim)}.slider::-moz-range-track{height:4px;background:var(--bg-hover);border-radius:2px;border:none}.slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--accent);cursor:pointer;border:none;transition:transform .15s ease}.slider:focus{outline:none}.slider:focus::-webkit-slider-thumb{box-shadow:0 0 0 4px var(--accent-dim)}.toggle-wrapper{display:flex;align-items:center;gap:.75rem;cursor:pointer}.toggle{position:relative;width:44px;height:24px;flex-shrink:0}.toggle input{opacity:0;width:0;height:0;position:absolute}.toggle-track{position:absolute;inset:0;background:var(--bg-hover);border-radius:var(--radius-full);border:1px solid var(--border-hover);transition:all .2s ease}.toggle input:checked+.toggle-track{background:var(--accent);border-color:var(--accent)}.toggle-thumb{position:absolute;top:3px;left:3px;width:16px;height:16px;background:#fff;border-radius:50%;transition:transform .2s ease;box-shadow:0 1px 4px #0000004d}.toggle input:checked~.toggle-thumb{transform:translate(20px)}.toggle-label{font-size:14px;color:var(--text-secondary);font-weight:500;user-select:none}.radio-group{display:flex;gap:.5rem;flex-wrap:wrap}.radio-btn{position:relative}.radio-btn input{position:absolute;opacity:0;width:0;height:0}.radio-btn-label{display:flex;align-items:center;gap:.5rem;padding:8px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-full);font-size:13px;font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .15s ease;user-select:none}.radio-btn input:checked+.radio-btn-label{background:var(--accent-dim);border-color:var(--accent-border);color:var(--accent)}.radio-btn-label:hover{border-color:var(--border-hover);color:var(--text-primary)}.checkbox-wrapper{display:flex;align-items:center;gap:.625rem;cursor:pointer}.checkbox-wrapper input[type=checkbox]{width:18px;height:18px;appearance:none;background:var(--bg-input);border:1px solid var(--border-hover);border-radius:4px;cursor:pointer;position:relative;flex-shrink:0;transition:all .15s ease}.checkbox-wrapper input[type=checkbox]:checked{background:var(--accent);border-color:var(--accent)}.checkbox-wrapper input[type=checkbox]:checked:after{content:"";position:absolute;top:2px;left:5px;width:5px;height:9px;border:2px solid #fff;border-top:none;border-left:none;transform:rotate(45deg)}.checkbox-label{font-size:14px;color:var(--text-secondary);user-select:none}.badge{display:inline-flex;align-items:center;gap:.25rem;padding:3px 12px;border-radius:var(--radius-full);font-size:12px;font-weight:500}.badge-format{background:var(--bg-input);border:1px solid var(--border);color:var(--text-secondary)}.badge-success{background:var(--success-dim);border:1px solid rgba(74,222,128,.3);color:var(--success)}.badge-warning{background:#fbbf241f;border:1px solid rgba(251,191,36,.3);color:var(--warning)}.badge-accent{background:var(--accent-dim);border:1px solid var(--accent-border);color:var(--accent)}.progress-track{width:100%;height:4px;background:var(--bg-input);border-radius:2px;overflow:hidden}.progress-fill{height:100%;background:var(--accent);border-radius:2px;transition:width .3s ease;width:0%}.upload-zone{background:var(--bg-surface);border:2px dashed var(--border-hover);border-radius:var(--radius-xl);padding:1.25rem 1rem;text-align:center;cursor:pointer;transition:all .2s ease;position:relative}.upload-zone:hover,.upload-zone.drag-over{border-color:var(--accent);background:var(--accent-dim)}.upload-zone.drag-over{animation:pulse-border 1s ease infinite}.upload-zone-icon{color:var(--accent);margin:0 auto .625rem;opacity:.8}.upload-zone-title{font-size:14px;font-weight:500;color:var(--text-secondary);margin-bottom:.5rem}.upload-zone-sub{font-size:13px;color:var(--text-muted);margin-bottom:.875rem}.upload-zone-formats{display:flex;gap:.5rem;justify-content:center;flex-wrap:wrap}.upload-zone 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var(--border);border-radius:var(--radius-sm);padding:.625rem .875rem}.file-list-drag{color:var(--text-muted);cursor:grab;font-size:18px;line-height:1}.file-list-name{flex:1;font-size:13px;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-list-duration{font-size:12px;color:var(--text-muted);font-variant-numeric:tabular-nums}.file-list-remove{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:var(--radius-sm);transition:color .15s;font-size:16px;line-height:1}.file-list-remove:hover{color:var(--danger)}.effects-rack{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem;margin-top:1.5rem}.effect-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem;transition:all .15s ease}.effect-card.disabled{opacity:.45}.effect-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.effect-card-title{display:flex;align-items:center;gap:.5rem;font-weight:600;font-size:14px;color:var(--text-primary)}.eq-sliders{display:grid;grid-template-columns:repeat(5,1fr);gap:.5rem;text-align:center}.eq-band{display:flex;flex-direction:column;align-items:center;gap:.25rem}.eq-band-label{font-size:11px;color:var(--text-muted)}.eq-band-value{font-size:11px;color:var(--text-secondary);font-variant-numeric:tabular-nums}.eq-slider-vertical{writing-mode:vertical-lr;direction:rtl;height:100px;width:44px;cursor:pointer;-webkit-appearance:slider-vertical;appearance:slider-vertical}.toolbar{display:flex;align-items:center;gap:.25rem;background:var(--bg-surface);border-bottom:1px solid var(--border);padding:.5rem 1rem;flex-wrap:wrap}.toolbar-group{display:flex;align-items:center;gap:.25rem}.toolbar-divider{width:1px;height:24px;background:var(--border);margin:0 .5rem}.toolbar-btn{background:none;border:1px solid transparent;border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;padding:6px 10px;font-size:13px;font-weight:500;transition:all .15s ease;white-space:nowrap}.toolbar-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border)}.toolbar-btn:disabled{opacity:.4;cursor:not-allowed}.notice{padding:.875rem 1rem;border-radius:var(--radius-md);font-size:13px;line-height:1.5}.notice-info{background:var(--accent-dim);border:1px solid var(--accent-border);color:var(--text-secondary)}.notice-warning{background:#fbbf241a;border:1px solid rgba(251,191,36,.3);color:var(--warning)}.notice-success{background:var(--success-dim);border:1px solid rgba(74,222,128,.3);color:var(--success)}.preset-group{display:flex;gap:.5rem;flex-wrap:wrap}.preset-btn{padding:7px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-full);font-size:13px;font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .15s ease}.preset-btn:hover,.preset-btn.active{background:var(--accent-dim);border-color:var(--accent-border);color:var(--accent)}.segments-list{display:flex;flex-direction:column;gap:.5rem;max-height:300px;overflow-y:auto}.segment-item{display:flex;align-items:center;justify-content:space-between;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.625rem .875rem}.segment-info{flex:1}.segment-name{font-size:13px;color:var(--text-primary);font-weight:500}.segment-time{font-size:12px;color:var(--text-muted)}.site-header{position:sticky;top:0;z-index:100;background:#0f1117eb;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px;max-width:1200px;margin:0 auto;padding:0 1.5rem}.logo{display:flex;align-items:center;gap:.5rem;font-size:17px;font-weight:600;color:var(--text-primary);text-decoration:none;transition:opacity .15s ease}.logo:hover{opacity:.85;color:var(--text-primary)}.logo-icon{color:var(--accent)}.site-nav{display:flex;align-items:center;gap:.25rem}.nav-link{padding:6px 14px;border-radius:var(--radius-full);font-size:14px;font-weight:500;color:var(--text-secondary);text-decoration:none;transition:all .15s ease}.nav-link:hover,.nav-link.active{color:var(--accent);background:var(--accent-dim)}.nav-dropdown{position:relative}.nav-dropdown-btn{display:flex;align-items:center;gap:.375rem;padding:6px 14px;background:none;border:none;border-radius:var(--radius-full);font-size:14px;font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .15s ease}.nav-dropdown-btn:hover{color:var(--text-primary);background:var(--bg-hover)}.nav-dropdown-arrow{transition:transform .2s ease;font-size:10px}.nav-dropdown.open .nav-dropdown-arrow{transform:rotate(180deg)}.nav-dropdown-menu{position:absolute;top:calc(100% + 8px);right:0;width:240px;background:var(--bg-card);border:1px solid var(--border-hover);border-radius:var(--radius-lg);padding:.5rem;box-shadow:var(--shadow-card);display:none}.nav-dropdown.open .nav-dropdown-menu{display:block}.nav-dropdown-item{display:flex;align-items:center;gap:.625rem;padding:8px 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var(--border);background:var(--bg-surface);padding:2rem 0 1.5rem;margin-top:0}.footer-inner{max-width:1200px;margin:0 auto;padding:0 1.5rem}.footer-tagline{font-size:15px;color:var(--text-secondary);margin-bottom:2rem;font-weight:500}.footer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:.5rem;margin-bottom:2rem}.footer-link{font-size:13px;color:var(--text-muted);text-decoration:none;transition:color .15s ease;padding:4px 0}.footer-link:hover{color:var(--accent)}.footer-privacy{display:flex;align-items:flex-start;gap:.5rem;padding:1rem;background:var(--success-dim);border:1px solid rgba(74,222,128,.2);border-radius:var(--radius-md);font-size:13px;color:var(--text-secondary);margin-bottom:1.5rem}.footer-copyright{font-size:13px;color:var(--text-muted);padding-top:1.5rem;border-top:1px solid var(--border)}.hero{padding:5rem 0 4rem;text-align:center}.hero-title{font-size:clamp(2rem,5vw,3.25rem);font-weight:600;color:var(--text-primary);line-height:1.2;margin-bottom:1.25rem;letter-spacing:-.02em}.hero-subtitle{font-size:1.1rem;color:var(--text-secondary);max-width:600px;margin:0 auto 2rem;line-height:1.7}.hero-cta{display:flex;align-items:center;justify-content:center;gap:1rem;flex-wrap:wrap;margin-bottom:2.5rem}.hero-badges{display:flex;align-items:center;justify-content:center;gap:1.5rem;flex-wrap:wrap}.hero-badge{display:flex;align-items:center;gap:.375rem;font-size:13px;color:var(--text-muted);font-weight:500}.hero-badge-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent)}.section-header{text-align:center;margin-bottom:3rem}.section-title{font-size:1.75rem;font-weight:600;color:var(--text-primary);margin-bottom:.75rem}.section-subtitle{font-size:15px;color:var(--text-secondary);max-width:500px;margin:0 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1.5rem;text-align:center}.feature-icon{width:48px;height:48px;border-radius:var(--radius-md);background:var(--accent-dim);display:flex;align-items:center;justify-content:center;margin:0 auto 1.25rem;color:var(--accent);font-size:22px}.feature-title{font-size:15px;font-weight:600;color:var(--text-primary);margin-bottom:.625rem}.feature-desc{font-size:13px;color:var(--text-muted);line-height:1.6}.tool-page{display:flex;flex-direction:column;height:calc(100vh - 60px);max-width:1200px;margin:0 auto;padding:.5rem 1.5rem .375rem;overflow:hidden}.tool-header{flex-shrink:0;margin-bottom:.4rem}.tool-header h1{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin:0 0 .15rem;line-height:1.3}.tool-desc{color:var(--text-muted);font-size:12px;margin:0;line-height:1.4}.tool-body{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden;gap:.375rem}.tool-panels{flex:1;display:grid;grid-template-columns:1fr 1px 1fr;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;min-height:0}.panel{padding:.875rem;overflow-y:auto;min-height:0}.panel-divider{background:var(--border);width:1px}.panel-title{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:var(--text-muted);margin-bottom:.75rem;display:flex;align-items:center;gap:.4rem}.tool-bottom{flex-shrink:0;display:flex;gap:.625rem;align-items:stretch;min-height:0}.tool-settings-wrap{flex:1;min-width:0;max-height:min(280px,50vh);overflow-y:auto;border-radius:var(--radius-lg)}.tool-settings{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:.625rem .875rem}.tool-settings-title{font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.5rem}.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:.625rem;align-items:start}.form-help{display:none}.tool-action{flex-shrink:0;display:flex;flex-direction:column;justify-content:center;align-items:stretch;min-width:155px;min-height:44px}.tool-action .btn{width:100%;padding:12px 20px;background:linear-gradient(135deg,var(--accent) 0%,#9d93ff 100%);box-shadow:0 2px 16px #7c6ff766;border:none;border-radius:var(--radius-lg);font-size:14px;font-weight:600;letter-spacing:.01em;color:#fff;transition:box-shadow .2s ease,transform .15s ease;white-space:nowrap}.tool-action .btn:hover:not(:disabled){box-shadow:0 4px 24px #7c6ff799;transform:translateY(-1px);color:#fff}.tool-action .btn:disabled{box-shadow:none;opacity:.45}.tool-bottom:has(.tool-settings-wrap:empty) 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