:root{--color-bg: #f7f8fc;--color-surface: #ffffff;--color-surface-hover: #f8fafb;--color-primary: #3b82f6;--color-primary-hover: #2563eb;--color-primary-light: #bfdbfe;--color-primary-subtle: #eff6ff;--color-text: #1e293b;--color-text-secondary: #64748b;--color-text-muted: #94a3b8;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-danger: #ef4444;--color-success: #10b981;--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(59, 130, 246, .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,#2563eb,#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:minmax(0,1fr) minmax(0,1fr);gap:var(--space-lg);align-items:start}@media (max-width: 768px){.layout{grid-template-columns:1fr}.layout>.panel:first-child{max-width:none}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}.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 #3b82f64d}.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}.controls{margin:var(--space-md) 0;display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}.control{display:flex;flex-direction:column;gap:5px;font-size:13px}.control.full{grid-column:1 / -1}.control label{color:var(--color-text);font-weight:500;font-size:12px;letter-spacing:.01em;display:flex;align-items:center;gap:4px}.control input,.control select{padding:7px 10px;border:1px solid var(--color-border);border-radius:6px;font-size:13px;font-family:var(--font-sans);color:var(--color-text);background:var(--color-surface);transition:border-color .15s ease,box-shadow .15s ease,background .15s ease;outline:none}.control input::placeholder{color:#c0c7cf;opacity:1}.control input:hover,.control select:hover{border-color:var(--color-text-muted);background:var(--color-surface-hover)}.control input:focus,.control select:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #3b82f61a;background:var(--color-surface)}.control select{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='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:28px;cursor:pointer}.control input[type=range]{appearance:none;width:100%;height:20px;padding:0;background:transparent;cursor:pointer;outline:none}.control input[type=range]::-webkit-slider-runnable-track{height:10px;border-radius:3px;background:var(--color-border)}.control input[type=range]::-webkit-slider-thumb{appearance:none;width:18px;height:18px;border-radius:50%;background:var(--color-primary);border:2px solid #fff;box-shadow:0 1px 4px #0000001f;margin-top:-5px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.control input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15);box-shadow:0 2px 8px #3b82f64d}.control input[type=range]::-webkit-slider-thumb:active{transform:scale(1.05);box-shadow:0 1px 3px #0000001f}.control input[type=range]::-moz-range-track{height:5px;border-radius:3px;background:var(--color-border);border:none}.control input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--color-primary);border:2px solid #fff;box-shadow:0 1px 4px #0000001f;cursor:pointer;transition:transform .15s ease}.control input[type=range]::-moz-range-thumb:hover{transform:scale(1.15)}.control input[type=range]::-moz-range-progress{height:5px;border-radius:3px;background:var(--color-primary-light)}.control input[type=checkbox]{width:16px;height:16px;accent-color:var(--color-primary);cursor:pointer;padding:0;border-radius:3px}.control input[type=color]{padding:2px 4px;height:34px;cursor:pointer;border-radius:6px}.control input[type=number]{-moz-appearance:textfield}.control input[type=number]::-webkit-inner-spin-button,.control input[type=number]::-webkit-outer-spin-button{opacity:0;height:20px}.color-swatch{display:inline-block;width:20px;height:20px;border-radius:4px;vertical-align:middle;border:1px solid rgba(0,0,0,.12);box-shadow:inset 0 1px 2px #fff6,0 1px 2px #00000014;transition:background-color var(--duration-fast) var(--ease-out)}.exif-card{background:var(--color-primary-subtle);border:1px solid var(--color-primary-light);border-radius:var(--radius-sm);padding:var(--space-sm) var(--space-md);margin-bottom:var(--space-md);font-size:13px}.exif-card h4{margin:0 0 6px;font-size:13px;font-weight:600;color:var(--color-primary)}.exif-row{display:flex;justify-content:space-between;padding:2px 0;color:var(--color-text-secondary)}.exif-row span:last-child{color:var(--color-text);font-family:var(--font-mono);font-size:12px}.output-actions{display:flex;gap:var(--space-sm);margin-top:var(--space-md)}.output-actions .btn{flex:1;padding:10px var(--space-md);font-size:14px}.radio-group{display:flex;gap:2px;background:var(--color-bg);border-radius:6px;padding:3px;border:1px solid var(--color-border)}.radio-label{flex:1;text-align:center;padding:7px 0;font-size:13px;border-radius:4px;cursor:pointer;color:var(--color-text-secondary);transition:background .15s ease,color .15s ease;font-weight:500}.radio-label:hover{color:var(--color-text)}.radio-label input{display:none}.radio-label.active{background:var(--color-surface);color:var(--color-primary);box-shadow:0 1px 2px #0000000f}.tabs{display:flex;gap:2px;margin-bottom:var(--space-md);border-bottom:2px solid var(--color-border-light);padding-bottom:0;flex-wrap:wrap}.tab{padding:9px 14px;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{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--color-success);margin-right:5px;vertical-align:middle;position:relative;top:-1px}.enable-step{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--color-text);cursor:pointer;padding:10px 14px;background:var(--color-primary-subtle);border-radius:8px;border:1px solid var(--color-primary-light);transition:all .15s ease}.enable-step:hover{background:#dbeafe;border-color:var(--color-primary)}.enable-step input[type=checkbox]{width:18px;height:18px;accent-color:var(--color-primary);cursor:pointer}[data-op-group].disabled{opacity:.4;pointer-events:none}.crop-grid-inner,[data-op-group]{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px;grid-column:1 / -1}.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;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)}.thumb-strip{display:flex;gap:8px;margin-top:12px;padding:8px;overflow-x:auto;background:var(--color-surface);border-radius:var(--radius-md);border:1px solid var(--color-border-light)}.thumb-item{position:relative;flex-shrink:0;width:100px;border-radius:var(--radius-sm);border:2px solid var(--color-border);overflow:hidden;cursor:pointer;background:var(--color-bg);transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease}.thumb-item:hover{border-color:var(--color-primary-light);transform:translateY(-1px);box-shadow:0 2px 8px #0000000f}.thumb-item.selected{border-color:var(--color-primary);background:var(--color-primary-subtle);box-shadow:0 0 0 2px #3b82f633,0 2px 8px #3b82f61f;transform:scale(1.04)}.thumb-item img{width:100%;height:70px;object-fit:cover;display:block}.thumb-del{position:absolute;top:2px;right:2px;width:20px;height:20px;border:none;border-radius:50%;background:#00000080;color:#fff;font-size:12px;line-height:20px;cursor:pointer;opacity:0;transition:opacity var(--duration-fast) var(--ease-out);padding:0}.thumb-item:hover .thumb-del{opacity:1}.thumb-name{display:block;padding:2px 4px;font-size:11px;color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.thumb-meta{display:block;padding:0 4px 4px;font-size:10px;color:var(--color-text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.preview-thumb img{max-width:100%;max-height:320px;display:block;margin:0 auto;object-fit:contain}.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)}.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 #3b82f666}.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}.meta{font-size:12px;color:var(--color-text-secondary);margin-top:10px;line-height:1.6}.result-info{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;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}.result-meta-text{flex:1;min-width:0}.result-actions{display:flex;gap:6px;flex-shrink:0}.btn-undo-redo{padding:3px 10px;font-size:12px;border:1px solid var(--color-border);border-radius:4px;background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;transition:border-color .15s,color .15s;white-space:nowrap}.btn-undo-redo:hover:not(:disabled){border-color:var(--color-primary-light);color:var(--color-primary)}.btn-undo-redo:disabled{opacity:.4;cursor:not-allowed}.loading-overlay{position:fixed;inset:0;z-index:9999;background:#0f172a80;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-md)}.loading-spinner{width:36px;height:36px;border:3px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{color:#fff;font-size:14px;font-weight:500}.rotate-actions{display:flex;gap:6px;margin-top:14px;flex-wrap:wrap}.rotate-actions .btn-mini{min-width:52px;text-align:center}.flip-actions{display:flex;gap:6px;margin-top:8px}.crop-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}.crop-grid .control{grid-column:span 1}.crop-grid .control.full{grid-column:span 2}.crop-visual{margin-top:18px}.crop-preview{position:relative;display:block;max-width:100%;cursor:crosshair;user-select:none;border-radius:8px;border:1px solid var(--color-border-light);background:var(--color-surface);line-height:0}.crop-preview img{display:block;max-width:100%;max-height:360px;object-fit:contain}.crop-rect{position:absolute;border:2px dashed rgba(59,130,246,.75);background:#3b82f61f;pointer-events:none;box-sizing:border-box;z-index:2}.crop-info-bar{display:flex;align-items:center;gap:10px;margin-top:8px;font-size:12px;color:var(--color-text-secondary);flex-wrap:wrap}.crop-info{font-variant-numeric:tabular-nums}.crop-warning{color:#d97706;font-weight:500}.btn-clear-crop{padding:3px 10px;font-size:12px;border:1px solid var(--color-border);border-radius:5px;background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;transition:border-color .15s,color .15s}.btn-clear-crop:hover{border-color:var(--color-text-muted);color:var(--color-text)}.crop-expand-btn{position:absolute;top:6px;right:6px;width:28px;height:28px;border:none;border-radius:6px;background:#00000073;color:#fff;font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .2s;z-index:3;line-height:1}.crop-preview:hover .crop-expand-btn{opacity:1}.crop-expand-btn:hover{background:#000000a6}.btn-crop-expand-text{padding:3px 10px;font-size:12px;border:1px solid var(--color-border);border-radius:5px;background:var(--color-surface);color:var(--color-text-secondary);cursor:pointer;transition:border-color .15s,color .15s}.btn-crop-expand-text:hover{border-color:var(--color-primary-light);color:var(--color-primary)}.crop-lightbox{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;animation:lbFadeIn .2s ease}@keyframes lbFadeIn{0%{opacity:0}to{opacity:1}}.crop-lb-mask{position:absolute;inset:0;background:#000000bf;backdrop-filter:blur(4px)}.crop-lb-panel{position:relative;display:flex;flex-direction:column;max-width:95vw;max-height:95vh;border-radius:12px;overflow:hidden;box-shadow:0 20px 60px #00000080;background:#1a1a1a}.crop-lb-toolbar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:#ffffff0f;border-bottom:1px solid rgba(255,255,255,.08);flex-shrink:0}.crop-lb-info{flex:1;font-size:13px;color:#ffffffd9;font-variant-numeric:tabular-nums}.crop-lb-clear{padding:4px 12px;font-size:12px;border:1px solid rgba(255,255,255,.2);border-radius:5px;background:transparent;color:#ffffffb3;cursor:pointer;transition:background .15s,border-color .15s}.crop-lb-clear:hover{background:#ffffff1a;border-color:#ffffff59}.crop-lb-close{width:32px;height:32px;border:none;border-radius:6px;background:#ffffff14;color:#fffc;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s;line-height:1}.crop-lb-close:hover{background:#ffffff2e}.crop-lb-stage{position:relative;display:flex;align-items:center;justify-content:center;cursor:crosshair;user-select:none;flex:1;min-height:200px;line-height:0}.crop-lb-stage img{display:block;max-width:90vw;max-height:80vh;object-fit:contain}.crop-lb-rect{position:absolute;border:2px dashed rgba(59,130,246,.8);background:#3b82f626;pointer-events:none;box-sizing:border-box;z-index:2}.run-error{margin-top:12px;padding:10px 14px;border-radius:6px;background:#d977061a;border:1px solid rgba(217,119,6,.25);color:#b45309;font-size:13px;line-height:1.5}@media (max-width: 640px){.tabs{gap:1px}.tab{padding:8px 10px;font-size:12px}.controls,.crop-grid,.crop-grid-inner,[data-op-group]{grid-template-columns:1fr}}.img-viewer{position:fixed;inset:0;z-index:10000;display:flex;align-items:center;justify-content:center;animation:ivFadeIn .2s ease}@keyframes ivFadeIn{0%{opacity:0}to{opacity:1}}.iv-backdrop{position:absolute;inset:0;background:#00000080;backdrop-filter:blur(4px)}.iv-close{position:absolute;top:16px;right:16px;z-index:100;width:40px;height:40px;border:none;border-radius:8px;background:#ffffff1f;color:#fff;font-size:24px;line-height:1;cursor:pointer;transition:background .15s}.iv-close:hover{background:#ffffff40}.iv-toolbar{position:absolute;bottom:24px;left:50%;transform:translate(-50%);z-index:10;display:flex;align-items:center;gap:8px;background:#0000008c;border-radius:10px;padding:6px 10px;backdrop-filter:blur(8px)}.iv-zoom-btn{width:32px;height:32px;border:1px solid rgba(255,255,255,.2);border-radius:6px;background:#ffffff14;color:#fff;font-size:16px;cursor:pointer;transition:background .15s;display:flex;align-items:center;justify-content:center}.iv-zoom-btn:hover{background:#fff3}.iv-zoom-pct{min-width:44px;text-align:center;color:#fff;font-size:13px;font-variant-numeric:tabular-nums}.iv-stage{position:relative;z-index:5;max-width:90vw;max-height:85vh;display:flex;align-items:center;justify-content:center;overflow:hidden}.iv-img{max-width:100%;max-height:85vh;object-fit:contain;transition:transform .1s ease;cursor:default;user-select:none}.iv-nav{position:absolute;top:50%;left:0;right:0;transform:translateY(-50%);z-index:10;display:flex;align-items:center;justify-content:space-between;padding:0 20px;pointer-events:none}.iv-nav-btn{width:44px;height:44px;border:none;border-radius:50%;background:#00000073;color:#fff;font-size:18px;cursor:pointer;pointer-events:auto;transition:background .15s;display:flex;align-items:center;justify-content:center}.iv-nav-btn:hover{background:#000000a6}.iv-counter{position:absolute;bottom:-48px;left:50%;transform:translate(-50%);color:#ffffffb3;font-size:13px;font-variant-numeric:tabular-nums}.preview-thumb img,.compare-img{cursor:pointer}.preview-thumb img:hover,.compare-img:hover{opacity:.9}