:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f5f7fb;color:#1f2937}:root.dark{color-scheme:dark;background:#101318;color:#f3f4f6}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at top left,rgba(64,158,255,.18),transparent 28rem),var(--app-bg, #f5f7fb)}:root.dark body{--app-bg: #101318}button,input{font:inherit}.app-shell{width:min(1440px,calc(100vw - 32px));margin:0 auto;padding:28px 0 40px}.hero{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:24px}.hero h1{margin:0 0 8px;font-size:clamp(28px,4vw,44px)}.hero p{margin:0;color:#6b7280}:root.dark .hero p{color:#a3aab8}.layout{display:grid;grid-template-columns:minmax(320px,420px) minmax(0,1fr);gap:18px}.operation-tabs{margin-top:18px}.panel{border-radius:18px}.upload-zone{display:grid;place-items:center;min-height:180px;padding:28px;border:2px dashed var(--el-border-color);border-radius:16px;color:var(--el-text-color-secondary);text-align:center;cursor:pointer;transition:border-color .2s ease,color .2s ease,background .2s ease}.upload-zone:hover,.upload-zone.is-dragging{border-color:var(--el-color-primary);color:var(--el-color-primary);background:var(--el-color-primary-light-9)}.upload-actions,.toolbar,.summary-grid,.download-actions{display:flex;flex-wrap:wrap;gap:10px}.toolbar{align-items:center;justify-content:space-between;margin-bottom:12px}.summary-grid{display:grid;grid-template-columns:repeat(4,minmax(120px,1fr));margin:16px 0}.summary-card{padding:12px;border:1px solid var(--el-border-color);border-radius:12px}.summary-card strong{display:block;margin-top:6px;font-size:18px}.thumb{width:72px;height:56px;object-fit:cover;border-radius:8px;border:1px solid var(--el-border-color)}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px}.color-field{display:grid;grid-template-columns:auto minmax(120px,1fr);gap:10px;align-items:center}.remove-watermark-panel{display:grid;grid-template-columns:minmax(360px,1fr) minmax(320px,420px);gap:18px}.remove-canvas-card,.remove-settings{min-width:0}.remove-toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-bottom:12px}.remove-stage{position:relative;display:grid;place-items:center;height:min(62vh,640px);min-height:360px;overflow:hidden;border:1px solid var(--el-border-color);border-radius:16px;background:linear-gradient(45deg,rgba(127,127,127,.08) 25%,transparent 25%),linear-gradient(-45deg,rgba(127,127,127,.08) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,rgba(127,127,127,.08) 75%),linear-gradient(-45deg,transparent 75%,rgba(127,127,127,.08) 75%);background-position:0 0,0 10px,10px -10px,-10px 0;background-size:20px 20px;touch-action:none}.remove-stage canvas{position:absolute;inset:0;width:100%;height:100%;cursor:crosshair}.remove-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.hidden-input{position:fixed;left:-9999px;width:1px;height:1px;opacity:0;pointer-events:none}.el-message{left:50%!important;right:auto!important;transform:translate(-50%)!important}@media (max-width: 1080px){.layout{grid-template-columns:1fr}.summary-grid{grid-template-columns:repeat(2,minmax(120px,1fr))}.remove-watermark-panel{grid-template-columns:1fr}}@media (max-width: 640px){.app-shell{width:min(100vw - 20px,1440px);padding-top:18px}.hero{align-items:flex-start;flex-direction:column}.form-grid,.summary-grid{grid-template-columns:1fr}}