:root{color-scheme:light;--bg: #f5f7fb;--surface: #ffffff;--surface-2: #eef2f7;--text: #18202f;--muted: #667085;--line: #d7deea;--accent: #0f8b8d;--accent-strong: #0a6263;--warning: #c2410c;--shadow: 0 20px 50px rgba(33, 43, 64, .12)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}button,input,select{font:inherit}.app{min-height:100vh;padding:24px}.workspace{width:min(1280px,100%);margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}.topbar-actions{display:flex;align-items:center;gap:10px}.download-action{display:flex;flex-direction:column;align-items:flex-end;gap:5px}.download-tip{max-width:210px;color:var(--accent-strong);font-size:12px;font-weight:700;line-height:1.35;text-align:right}.desktop-tip{max-width:360px;border:1px solid rgba(15,139,141,.22);border-radius:8px;padding:10px 12px;color:#075c5e;background:#e8f8f8;font-size:13px;font-weight:800;line-height:1.45}h1,h2,p{margin:0}h1{font-size:clamp(28px,4vw,46px);line-height:1.05}.topbar p{margin-top:8px;color:var(--muted);font-size:15px}.ghost-button{min-height:44px;border:1px solid transparent;border-radius:8px;padding:0 18px;color:#fff;background:var(--accent);cursor:pointer;font-weight:700}.ghost-button:hover:not(:disabled){background:var(--accent-strong)}.ghost-button:disabled{cursor:not-allowed;opacity:.45}.secondary-button,.icon-button{min-height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;color:#344054;cursor:pointer;font-weight:700}.secondary-button{padding:0 16px}.secondary-button:hover,.icon-button:hover{border-color:#98a6bb;background:#f8fafc}.secondary-button.active,.secondary-button[aria-pressed=true]{border-color:#0f8b8d57;color:var(--accent-strong);background:#e8f8f8}.secondary-button:disabled{cursor:not-allowed;opacity:.45}.icon-button{display:grid;width:40px;place-items:center;font-size:18px;line-height:1}.tool-layout{display:grid;grid-template-columns:minmax(260px,320px) 1fr;gap:18px;align-items:start}.panel,.palette-panel{border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.controls{display:grid;gap:18px;padding:16px}.drop-zone{display:grid;min-height:168px;place-items:center;gap:8px;border:1px dashed #9aa8bd;border-radius:8px;background:#f9fbff;text-align:center;cursor:pointer;padding:22px 16px}.drop-zone.dragging{border-color:var(--accent);background:#e8f8f8}.drop-zone input{position:absolute;inline-size:1px;block-size:1px;opacity:0;pointer-events:none}.upload-icon{display:grid;width:44px;height:44px;place-items:center;border-radius:50%;color:#fff;background:var(--accent);font-size:30px;line-height:1}.crop-image-button{width:100%}.drop-zone small,.stats,.palette-header span{color:var(--muted);font-size:13px}.control-group{display:grid;gap:10px;margin:0;padding:0;border:0}.control-row,.palette-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.control-row label,.control-group legend,.toggle{color:#344054;font-weight:700;font-size:14px}output{color:var(--accent-strong);font-weight:800}input[type=range]{width:100%;accent-color:var(--accent)}.select-control{width:100%;min-height:40px;border:1px solid var(--line);border-radius:8px;padding:0 12px;color:#344054;background:#fff;font-weight:800;cursor:pointer}.select-control:focus-visible{outline:2px solid var(--accent-strong);outline-offset:2px}.segmented-control{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;padding:4px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2)}.segmented-control label{cursor:pointer}.segmented-control input{position:absolute;opacity:0;pointer-events:none}.segmented-control span{display:grid;min-height:36px;place-items:center;border-radius:6px;color:#475467;font-size:13px;font-weight:800}.segmented-control input:checked+span{color:#fff;background:var(--accent)}.segmented-control input:focus-visible+span{outline:2px solid var(--accent-strong);outline-offset:2px}.toggle{display:flex;align-items:center;gap:10px}.toggle:has(input:disabled){cursor:not-allowed;opacity:.58}.toggle input{width:18px;height:18px;accent-color:var(--accent)}.grid-assist-settings{display:grid;gap:12px;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2)}.grid-assist-settings[hidden]{display:none}.color-picker{width:100%;height:42px;padding:4px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}.color-picker::-webkit-color-swatch-wrapper{padding:0}.color-picker::-webkit-color-swatch{border:0;border-radius:6px}.color-picker::-moz-color-swatch{border:0;border-radius:6px}.model-status{min-height:34px;margin-top:-10px;padding:8px 10px;border-radius:8px;color:var(--muted);background:var(--surface-2);font-size:12px;font-weight:700;line-height:1.45}.model-status[data-type=ready]{color:#075c5e;background:#e8f8f8}.model-status[data-type=error]{color:var(--warning);background:#fff3ed}.stats{min-height:38px;padding:10px 12px;border-radius:8px;background:var(--surface-2)}.preview-area{display:grid;gap:18px}.canvas-wrap{position:relative;display:grid;min-height:560px;place-items:center;overflow:hidden;border:1px solid var(--line);border-radius:8px;background:linear-gradient(45deg,#dfe5ef 25%,transparent 25%),linear-gradient(-45deg,#dfe5ef 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#dfe5ef 75%),linear-gradient(-45deg,transparent 75%,#dfe5ef 75%);background-color:#f7f9fc;background-position:0 0,0 10px,10px -10px,-10px 0;background-size:20px 20px;box-shadow:var(--shadow)}canvas{max-width:none;max-height:none;cursor:default;image-rendering:pixelated;touch-action:none}canvas.editing{cursor:crosshair}.empty-state{position:absolute;inset:0;display:grid;place-content:center;gap:8px;text-align:center;color:var(--muted);pointer-events:none}.empty-state strong{color:var(--text);font-size:22px}.empty-state.hidden{display:none}.edit-hint{position:absolute;left:14px;bottom:14px;max-width:min(360px,calc(100% - 28px));border:1px solid rgba(15,139,141,.24);border-radius:8px;padding:9px 12px;color:#075c5e;background:#e8f8f8eb;font-size:13px;font-weight:700;pointer-events:none;box-shadow:0 8px 20px #212b401a}.palette-panel{padding:16px}.palette-header{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:14px}.palette-header h2{font-size:17px}.palette-summary{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px 10px}.palette-tip{margin-bottom:12px;color:var(--muted);font-size:13px}.palette-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px}.swatch{display:grid;grid-template-columns:1fr auto;align-items:stretch;overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#fff;color:inherit}.swatch:hover{border-color:#8aa1bd}.swatch.selected{border-color:var(--accent);box-shadow:0 0 0 3px #0f8b8d2e}.swatch-main{display:grid;grid-template-columns:34px 1fr;align-items:center;gap:10px;min-width:0;min-height:52px;border:0;padding:7px 8px;background:transparent;color:inherit;cursor:pointer;text-align:left}.swatch-main:hover{background:#f8fafc}.swatch-replace{min-width:58px;border:0;border-left:1px solid var(--line);padding:0 10px;color:var(--accent-strong);background:#f4fbfb;cursor:pointer;font-size:12px;font-weight:800}.swatch-replace:hover{background:#e8f8f8}.swatch-color{width:34px;height:34px;border-radius:50%;border:1px solid rgba(0,0,0,.12)}.transparent-swatch{grid-template-columns:1fr}.swatch-color-transparent{background:linear-gradient(45deg,#cfd7e3 25%,transparent 25%),linear-gradient(-45deg,#cfd7e3 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#cfd7e3 75%),linear-gradient(-45deg,transparent 75%,#cfd7e3 75%);background-color:#fff;background-position:0 0,0 7px,7px -7px,-7px 0;background-size:14px 14px}.swatch strong{display:flex;align-items:center;gap:6px;font-size:12px;line-height:1.2}.swatch small{display:block;margin-top:2px;color:#98a2b3;font-size:11px;font-weight:800}.swatch em{min-width:28px;border-radius:6px;padding:3px 5px;color:#fff;background:#18202f;font-style:normal;text-align:center}.swatch span{color:var(--muted);font-size:12px}.replace-modal{position:fixed;inset:0;z-index:18;display:grid;place-items:center;padding:18px;background:#0f172a7a}.replace-modal[hidden]{display:none}.replace-dialog{width:min(680px,100%);max-height:min(720px,calc(100vh - 36px));display:grid;grid-template-rows:auto 1fr;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 28px 80px #0f172a47;overflow:hidden}.replace-header{display:flex;align-items:start;justify-content:space-between;gap:16px;padding:18px;border-bottom:1px solid var(--line)}.replace-header h2{font-size:20px}.replace-header p{margin-top:6px;color:var(--muted);font-size:14px}.replace-options{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;overflow:auto;padding:16px}.replace-option{display:grid;grid-template-columns:42px 1fr;align-items:center;gap:12px;min-height:64px;border:1px solid var(--line);border-radius:8px;padding:10px;background:#fff;color:inherit;cursor:pointer;text-align:left}.replace-option:hover{border-color:var(--accent);background:#f4fbfb}.replace-option-color{width:42px;height:42px;border:1px solid rgba(0,0,0,.14);border-radius:8px}.transparent-option .replace-option-color{background:linear-gradient(45deg,#cfd7e3 25%,transparent 25%),linear-gradient(-45deg,#cfd7e3 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#cfd7e3 75%),linear-gradient(-45deg,transparent 75%,#cfd7e3 75%);background-color:#fff;background-position:0 0,0 8px,8px -8px,-8px 0;background-size:16px 16px}.replace-option strong,.replace-option small{display:block}.replace-option strong{font-size:14px}.replace-option small{margin-top:3px;color:var(--muted);font-size:12px}.ad-modal{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:18px;background:#0f172a8f}.ad-modal[hidden]{display:none}.crop-modal{position:fixed;inset:0;z-index:24;display:grid;place-items:center;padding:18px;background:#0f172a8f}.crop-modal[hidden]{display:none}.crop-dialog{display:grid;grid-template-rows:auto 1fr;width:min(920px,100%);max-height:min(760px,calc(100vh - 36px));overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 28px 80px #0f172a52}.crop-header{display:flex;align-items:start;justify-content:space-between;gap:16px;padding:18px;border-bottom:1px solid var(--line)}.crop-header h2{font-size:20px}.crop-header p{margin-top:6px;color:var(--muted);font-size:14px}.crop-body{display:grid;grid-template-rows:minmax(280px,1fr) auto;min-height:0}.crop-stage{min-height:0;padding:14px;background:#101828}.crop-stage img{display:block;max-width:100%;height:min(58vh,560px);margin:0 auto;object-fit:contain}.crop-stage cropper-canvas{width:100%;height:min(58vh,560px)}.crop-stage cropper-selection{outline:2px solid rgba(15,139,141,.95);outline-offset:-1px}.crop-controls{display:flex;align-items:end;justify-content:space-between;gap:16px;padding:16px 18px 18px;border-top:1px solid var(--line)}.crop-ratio-control{min-width:min(340px,100%)}.crop-actions{display:flex;justify-content:flex-end;gap:10px}.crop-actions .ghost-button{min-width:128px}.processing-overlay{position:fixed;inset:0;z-index:30;display:grid;place-items:center;padding:18px;background:#0f172a9e;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.processing-overlay[hidden]{display:none}.processing-dialog{display:grid;grid-template-columns:56px minmax(0,1fr);align-items:center;gap:16px;width:min(360px,100%);border:1px solid rgba(255,255,255,.3);border-radius:8px;padding:18px;background:#fff;box-shadow:0 28px 80px #0f172a57}.processing-spinner{width:48px;height:48px;border:4px solid #d9edf0;border-top-color:var(--accent);border-radius:50%;animation:processing-spin .9s linear infinite}.processing-dialog strong,.processing-dialog span{display:block}.processing-dialog strong{font-size:18px;line-height:1.3}.processing-dialog span{margin-top:6px;color:var(--muted);font-size:14px;font-weight:700}@keyframes processing-spin{to{transform:rotate(360deg)}}.ad-dialog{width:min(560px,100%);border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 28px 80px #0f172a52;padding:18px}.ad-dialog-header{display:flex;align-items:start;justify-content:space-between;gap:16px;margin-bottom:16px}.ad-dialog-header h2{font-size:20px}.ad-dialog-header p{margin-top:6px;color:var(--muted);font-size:14px}.ad-slot{position:relative;display:grid;min-height:220px;place-content:center;gap:8px;border:1px dashed #9aa8bd;border-radius:8px;background:#f8fafc;color:var(--muted);text-align:center}.baidu-ad-container{width:min(100%,480px);min-height:160px}.baidu-ad-container:empty{display:none}.ad-slot strong{color:var(--text);font-size:18px}.ad-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}.site-footer{display:flex;justify-content:center;margin-top:22px;padding:18px 12px 6px;color:var(--muted);font-size:13px}.site-footer a{color:inherit;text-decoration:none}.site-footer a:hover{color:var(--accent-strong);text-decoration:underline}@media(max-width:840px){.app{padding:16px}.topbar{align-items:stretch;flex-direction:column}.topbar-actions{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(142px,1.28fr);align-items:start;gap:10px}.download-action{align-items:stretch;gap:7px}.topbar-actions .secondary-button,.topbar-actions .ghost-button{min-height:64px;padding:0 12px;line-height:1.2}.download-tip{max-width:none;color:#075c5e;font-size:11px;font-weight:700;line-height:1.35;text-align:center}.tool-layout{grid-template-columns:1fr}.canvas-wrap{min-height:420px}.ad-actions{flex-direction:column-reverse}.crop-modal{padding:0}.crop-dialog{width:100%;height:100dvh;max-height:none;border-radius:0}.crop-body{grid-template-rows:minmax(0,1fr) auto;overflow:hidden}.crop-stage{display:grid;min-height:0;padding:12px}.crop-stage img,.crop-stage cropper-canvas{width:100%;height:100%;min-height:0}.crop-controls,.crop-actions{align-items:stretch;flex-direction:column}.crop-actions .ghost-button{width:100%}.crop-controls{gap:12px;padding:14px 18px calc(18px + env(safe-area-inset-bottom))}}@media(max-width:520px){.topbar-actions{grid-template-columns:repeat(2,minmax(0,1fr))}.download-action{grid-column:1 / -1}.topbar-actions .ghost-button{min-height:58px}}