:root{--color-bg: #f7f8fc;--color-surface: #ffffff;--color-surface-hover: #f8fafb;--color-primary: #0d9488;--color-primary-hover: #0f766e;--color-primary-light: #ccfbf1;--color-primary-subtle: #f0fdfa;--color-text: #1e293b;--color-text-secondary: #64748b;--color-text-muted: #94a3b8;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-danger: #ef4444;--color-success: #10b981;--color-warning: #f59e0b;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06), 0 1px 3px rgba(0, 0, 0, .04);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .08), 0 2px 6px rgba(0, 0, 0, .04);--shadow-focus: 0 0 0 3px rgba(13, 148, 136, .15);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-full: 9999px;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;--font-mono: "JetBrains Mono", "SF Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-in-out: cubic-bezier(.65, 0, .35, 1);--duration-fast: .15s;--duration-normal: .25s;--duration-slow: .4s}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);font-size:14px;line-height:1.6;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-text-muted)}.container{max-width:1200px;margin:0 auto;padding:var(--space-xl) var(--space-md) 100px}header{text-align:center;margin-bottom:var(--space-2xl);padding-top:var(--space-md)}header h1{margin:0 0 10px;font-size:38px;font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,#0d9488,#6366f1,#a855f7);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}header p{margin:0;color:var(--color-text-secondary);font-size:14px;font-weight:400;letter-spacing:.01em}.layout{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-lg);align-items:start}@media (max-width: 768px){.layout{grid-template-columns:1fr}header h1{font-size:30px}.container{padding:var(--space-md) var(--space-sm) 80px}}.panel{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--space-lg);box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:box-shadow var(--duration-fast) var(--ease-out)}.panel:hover{box-shadow:var(--shadow-md)}.panel h2{margin:0 0 var(--space-md);font-size:16px;font-weight:700;color:var(--color-text);border-left:3px solid var(--color-primary);padding-left:12px;line-height:1.3;letter-spacing:-.01em}.drop-zone{border:2px dashed var(--color-border);border-radius:var(--radius-md);padding:var(--space-2xl) var(--space-lg);text-align:center;cursor:pointer;color:var(--color-text-muted);background:var(--color-surface);transition:all var(--duration-normal) var(--ease-out);position:relative;overflow:hidden}.drop-zone:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at center,var(--color-primary-subtle) 0%,transparent 70%);opacity:0;transition:opacity var(--duration-normal) var(--ease-out)}.drop-zone:hover,.drop-zone.dragover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-subtle)}.drop-zone:hover:before,.drop-zone.dragover:before{opacity:1}.drop-zone p{margin:0;font-size:14px;font-weight:500;position:relative;z-index:1}.controls{margin:var(--space-md) 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}.control{display:flex;flex-direction:column;gap:var(--space-xs);font-size:13px}.control label{color:var(--color-text-secondary);font-weight:500;font-size:12px;text-transform:none;letter-spacing:.01em}.control input,.control select{padding:8px 10px;border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:13px;font-family:var(--font-sans);color:var(--color-text);background:var(--color-surface);transition:all var(--duration-fast) var(--ease-out);outline:none}.control input:hover,.control select:hover{border-color:var(--color-text-muted)}.control input:focus,.control select:focus{border-color:var(--color-primary);box-shadow:var(--shadow-focus)}.control input[type=range]{padding:4px 0;accent-color:var(--color-primary);cursor:pointer}.control input[type=color]{padding:2px 4px;height:34px;cursor:pointer}.control input[type=checkbox]{width:16px;height:16px;accent-color:var(--color-primary);cursor:pointer;padding:0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 20px;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-sm);cursor:pointer;font-size:14px;font-weight:600;font-family:var(--font-sans);text-decoration:none;transition:all var(--duration-fast) var(--ease-out);white-space:nowrap;user-select:none}.btn:hover{background:var(--color-primary-hover);transform:translateY(-1px);box-shadow:0 4px 12px #0d94884d}.btn:active{transform:translateY(0);box-shadow:none}.btn:disabled{background:var(--color-border);color:var(--color-text-muted);cursor:not-allowed;transform:none;box-shadow:none}.btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.btn-mini{padding:6px 14px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;font-size:12px;font-weight:500;font-family:var(--font-sans);transition:all var(--duration-fast) var(--ease-out);white-space:nowrap}.btn-mini:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-subtle)}.btn-mini:active{transform:scale(.97)}.btn-mini.active{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.btn-mini:disabled{opacity:.45;cursor:not-allowed;border-color:var(--color-border);color:var(--color-text-muted);background:var(--color-surface)}.btn-mini:focus-visible{outline:2px solid var(--color-primary);outline-offset:1px}.preview{margin-top:12px;text-align:center}.preview img{max-width:100%;max-height:360px;border-radius:var(--radius-sm);border:1px solid var(--color-border-light);object-fit:contain}.preview-thumb{position:relative;margin-top:12px;text-align:center;cursor:zoom-in;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--color-border-light);background:var(--color-surface);transition:border-color var(--duration-fast) var(--ease-out)}.preview-thumb:hover{border-color:var(--color-border)}.preview-thumb img{max-width:100%;max-height:320px;display:block;margin:0 auto;transition:opacity var(--duration-normal) var(--ease-out)}.preview-thumb:hover img{opacity:.88}.zoom-hint{position:absolute;bottom:12px;left:50%;transform:translate(-50%);padding:5px 14px;background:#0f172abf;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:#fff;font-size:12px;font-weight:500;border-radius:var(--radius-full);pointer-events:none;opacity:0;transition:opacity var(--duration-normal) var(--ease-out)}.preview-thumb:hover .zoom-hint{opacity:1}.preview-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:var(--space-sm)}.preview-modes{display:flex;gap:var(--space-xs)}.lightbox{position:fixed;inset:0;z-index:9999;background:#0f172af0;display:flex;flex-direction:column;animation:fadeIn var(--duration-normal) var(--ease-out)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.lightbox-bar{display:flex;align-items:center;gap:var(--space-sm);padding:12px 16px;background:#0f172a80;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:#fff;flex-shrink:0;border-bottom:1px solid rgba(255,255,255,.06)}.lightbox-info{margin-right:auto;font-size:13px;color:var(--color-border);font-family:var(--font-mono);font-weight:500}.lightbox .btn-mini{background:#ffffff14;border-color:#ffffff1f;color:#ffffffd9}.lightbox .btn-mini:hover{background:#ffffff29;border-color:var(--color-primary);color:var(--color-primary)}.lightbox-stage{flex:1;overflow:hidden;display:flex;align-items:center;justify-content:center;position:relative;cursor:grab}.lightbox-stage:active{cursor:grabbing}.lightbox-img{max-width:90vw;max-height:90vh;object-fit:contain;transform-origin:center center;transition:transform .08s linear;user-select:none;-webkit-user-drag:none;pointer-events:none}.meta{font-size:12px;color:var(--color-text-secondary);margin-top:10px;line-height:1.6}.result-info{background:var(--color-primary-subtle);border:1px solid var(--color-primary-light);border-radius:var(--radius-sm);padding:10px 14px;font-size:12px;font-family:var(--font-mono);color:var(--color-text);margin-top:12px;word-break:break-all;line-height:1.5}.tabs{display:flex;gap:2px;margin-bottom:var(--space-md);border-bottom:2px solid var(--color-border-light);padding-bottom:0}.tab{padding:9px 12px;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;font-size:13px;font-weight:500;color:var(--color-text-secondary);transition:all var(--duration-fast) var(--ease-out);border-radius:var(--radius-sm) var(--radius-sm) 0 0;user-select:none;position:relative;white-space:nowrap}.tab:hover{color:var(--color-text);background:var(--color-surface-hover)}.tab.active{color:var(--color-primary);border-bottom-color:var(--color-primary);font-weight:600}.tab.active:hover{background:transparent}.tab .dot{color:var(--color-success);font-size:8px;margin-left:5px;vertical-align:middle;display:inline-block}.enable-row{margin-bottom:14px;padding:10px 14px;background:var(--color-primary-subtle);border:1px solid var(--color-primary-light);border-radius:var(--radius-sm);font-size:13px}.enable-row label{display:flex;align-items:center;gap:8px;cursor:pointer;color:var(--color-text);font-weight:600;user-select:none}.enable-row input[type=checkbox]{width:16px;height:16px;accent-color:var(--color-primary);cursor:pointer;margin:0}.compare{position:relative;width:100%;overflow:hidden;border-radius:var(--radius-md);border:1px solid var(--color-border-light);user-select:none;cursor:ew-resize}.compare-img{display:block;width:100%;height:auto;max-height:500px;object-fit:contain;pointer-events:none;user-select:none;-webkit-user-drag:none}.compare-overlay{position:absolute;top:0;left:0;height:100%;overflow:hidden;pointer-events:none}.compare-overlay .compare-img{height:100%;object-fit:cover}.compare-divider{position:absolute;top:0;bottom:0;width:2px;background:var(--color-primary);pointer-events:none;box-shadow:0 0 8px #0d948866}.compare-divider:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;background:var(--color-primary);box-shadow:0 2px 12px #0000004d;border:2px solid rgba(255,255,255,.4)}.compare-label-left,.compare-label-right{position:absolute;top:12px;padding:5px 12px;background:#0f172ab3;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:#fff;font-size:12px;font-weight:500;border-radius:var(--radius-sm);pointer-events:none}.compare-label-left{left:12px}.compare-label-right{right:12px}.crop-area{margin:12px 0}.crop-label{font-size:13px;color:var(--color-text-secondary);margin-bottom:10px;font-family:var(--font-mono);line-height:1.5}.crop-canvas-wrap{position:relative;display:inline-block;max-width:100%;cursor:crosshair;user-select:none;line-height:0;border:1px solid var(--color-border-light);border-radius:var(--radius-md);overflow:hidden}.crop-img{display:block;max-width:100%;max-height:400px;pointer-events:none;user-select:none;-webkit-user-drag:none}.crop-selection{position:absolute;border:2px dashed var(--color-primary);background:#0d94881f;pointer-events:none;box-sizing:border-box}.crop-actions{display:flex;gap:var(--space-sm);margin-top:12px}.crop-lb-stage{cursor:crosshair}.crop-lb-wrap{position:relative;display:inline-block;max-width:90vw;max-height:90vh;user-select:none;line-height:0}.crop-lb-img{display:block;max-width:90vw;max-height:85vh;pointer-events:none;user-select:none;-webkit-user-drag:none}.crop-lb-wrap .crop-selection{border-width:3px}.thumb-wrap{position:relative;flex-shrink:0}.thumb-wrap .thumb-del{position:absolute;top:-6px;right:-6px;width:20px;height:20px;background:var(--color-danger);color:#fff;border-radius:50%;font-size:13px;line-height:20px;text-align:center;cursor:pointer;opacity:0;transition:opacity var(--duration-fast) var(--ease-out);box-shadow:0 2px 6px #ef444466;border:none}.thumb-wrap:hover .thumb-del{opacity:1}.thumb-item{height:64px;width:64px;object-fit:cover;border-radius:var(--radius-sm);cursor:pointer;border:2px solid transparent;transition:all var(--duration-fast) var(--ease-out)}.thumb-item:hover{transform:scale(1.06);box-shadow:var(--shadow-md)}a.btn{text-decoration:none}select{cursor:pointer}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}::selection{background:var(--color-primary-light);color:var(--color-text)}.loading-overlay{position:fixed;inset:0;z-index:99999;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#0f172a59;backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(8px);animation:fadeIn var(--duration-normal) var(--ease-out)}.loading-spinner{width:48px;height:48px;border:4px solid rgba(255,255,255,.15);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{margin-top:16px;font-size:15px;font-weight:500;color:#fff;letter-spacing:.02em}