:root{color-scheme:light;--page:#fbfaf7;--ink:#1c1c1a;--muted:#77766e;--rule:rgba(36,35,30,.14);--accent:#d7a82e;--a:#c5b775;--t:#9caec6;--g:#90a998;--c:#c79e92;--u:#b6a1be;font-family:Noto Sans SC,Microsoft YaHei,PingFang SC,system-ui,sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink)}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{opacity:.35;cursor:default}a{color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid #997326;outline-offset:3px}button{border:0;background:transparent}h1,h2,h3,p{margin:0}button,[hidden]{transition:none}.mono{font-family:Consolas,ui-monospace,monospace}.skip-link{position:absolute;z-index:20;top:-80px;background:#fff;padding:14px}.skip-link:focus{top:8px}.lab-shell{width:min(1440px,100% - 88px);margin:0 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#wb-page-list{overflow:auto;min-height:0;flex:1;overscroll-behavior:contain;touch-action:pan-y}#wb-page-list button{display:flex;flex-direction:column;align-items:flex-start;width:100%;gap:8px;text-align:left;padding:15px 13px;border:1px solid #dce1d6;margin-bottom:9px;min-height:76px}#wb-page-list button[aria-current=page]{background:#e6ecdd;border-color:#b4c8aa}#wb-page-list strong{font-size:13px;font-weight:550}#wb-page-list span{font-size:10px;color:#768273}#wb-export{width:100%;border:1px solid #c5d1bc;background:#f1f3e9}.wb-dialog{width:min(440px,calc(100vw - 32px));border:1px solid #c3d0ba;border-radius:17px;background:#faf9f2;color:#2f473a;padding:25px;box-shadow:0 20px 80px #1e332a33}.wb-dialog::backdrop{background:#162a2859}.wb-dialog h3{font-size:20px;line-height:1.5;margin:0 0 14px}.wb-dialog p{font-size:14px;line-height:1.85;color:#72816e}.wb-dialog label{display:block;font-size:12px;color:#72816e;margin-bottom:8px}.wb-dialog textarea{resize:vertical;width:100%;max-height:40vh;min-height:120px;border:1px solid #c3d0ba;border-radius:8px;background:#fffffb;padding:12px;font:16px/1.65 inherit;color:#2f473a}.wb-dialog div{display:flex;gap:9px;justify-content:flex-end;margin-top:23px}.wb-dialog button{padding:0 17px;border:1px solid #c3d0ba}.wb-dialog .wb-danger{color:#fbf4ec;background:#975449;border-color:#975449}.wb-dialog .wb-primary{color:#f6f6ed;background:#36553e;border-color:#36553e}@media(hover:hover)and (pointer:fine){.wb-shell button:not(:disabled):not([aria-pressed=true]):not(.wb-exit):not(.wb-primary):not(.wb-danger):hover{background:#e8ede1}.wb-shell .wb-exit:hover{background:#3d5a48}}@media(min-width:1700px){.wb-shell{grid-template-rows:90px minmax(0,1fr) auto}.wb-shell button{min-height:54px}.wb-tools>button,.wb-history>button{min-width:70px;min-height:68px;font-size:13px}.wb-footer{padding:17px 32px 15px}.wb-palette>button{min-width:46px}.wb-heading h2{font-size:22px}}@media(max-width:1100px){.wb-toolbar{gap:7px;justify-content:space-between}.wb-tools{padding-right:7px}.wb-tools>button,.wb-history>button{min-width:48px;padding:6px}.wb-palette>button{min-width:32px;width:32px}.wb-history{padding-left:6px}.wb-header{padding:0 16px}.wb-footer{padding:10px 14px}}@media(max-width:760px){.wb-shell{grid-template-rows:68px minmax(0,1fr) auto}.wb-brand,.wb-frozen{display:none}.wb-header{gap:7px;padding:0 12px}.wb-heading h2{font-size:16px}.wb-heading p{font-size:9px;max-width:42vw}.wb-header-actions{gap:6px}.wb-header-actions>button{padding:0 10px;font-size:11px}.wb-header-actions .wb-exit{padding:0 10px;gap:7px}.wb-exit span{display:none}.wb-toolbar{justify-content:center;gap:6px}.wb-tools{width:100%;justify-content:space-between;padding:0 0 7px;border-right:0;border-bottom:1px solid #d7ddd3}.wb-tools>button{min-width:42px;padding:5px 7px;min-height:56px;font-size:10px}.wb-tools svg{width:21px;height:21px}.wb-footer{padding:8px 9px max(9px,env(safe-area-inset-bottom))}.wb-history>button{min-width:42px;font-size:10px;min-height:48px}.wb-history #wb-clear{min-width:54px;font-size:10px}.wb-palette>button{min-width:31px;width:31px}.wb-palette{gap:0}.wb-palette>button>span{width:18px;height:18px}.wb-width{font-size:9px}.wb-width select{min-width:48px;min-height:40px;padding:2px 4px}.wb-history{gap:0;padding-left:4px}.wb-view-actions{right:12px;bottom:12px}.wb-view-actions button{min-width:44px;padding:0 9px;font-size:11px;min-height:44px}.wb-footnotes{font-size:9px;gap:5px;padding-top:8px;align-items:flex-start}.wb-footnotes>span:first-child{max-width:61%}.wb-local-note{font-size:9px;text-align:left;margin-top:5px}}@media(prefers-reduced-motion:reduce){.wb-shell{animation:none}}@media(pointer:coarse){.wb-palette>button{min-width:44px;width:44px;min-height:48px}.wb-tools>button,.wb-history>button{min-width:48px;min-height:52px}.wb-width select{min-height:48px}.wb-toolbar{row-gap:8px}}.textbook-dialog{width:min(780px,calc(100vw - 36px));height:min(92svh,1100px);max-width:none;max-height:none;padding:0;border:1px solid #d4ccb9;border-radius:14px;background:var(--page);color:var(--ink);box-shadow:0 24px 80px #17251f66;overflow:hidden}.textbook-dialog::backdrop{background:#14231cbf;backdrop-filter:blur(4px)}.textbook-window{display:flex;flex-direction:column;height:100%;min-height:0}.textbook-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 23px 14px;border-bottom:1px solid var(--rule)}.textbook-header h2{margin-top:6px;font-size:21px;font-weight:600;line-height:1.35}.textbook-header p{margin-top:5px;color:var(--muted);font-size:11px}.textbook-header .icon-button{width:40px;height:40px;flex:none;font-size:26px}.textbook-stage{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;padding:15px;background:#ebe9df;text-align:center}.textbook-stage img{display:block;width:auto;height:auto;max-width:100%;max-height:calc(92svh - 190px);margin:auto;box-shadow:0 4px 25px #2c2c2740}.textbook-stage img[hidden],.textbook-stage .textbook-status[hidden],.textbook-actions button[hidden]{display:none!important}.textbook-stage.is-zoomed img{max-width:none;max-height:none}.textbook-status{display:grid;place-items:center;min-height:100%;color:#645e4e;font-size:14px;line-height:1.7}.textbook-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:61px;padding:10px 23px;border-top:1px solid var(--rule);color:var(--muted);font-size:11px}.textbook-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px}.textbook-actions button,.textbook-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:8px 12px;border:1px solid #cfc8b7;border-radius:7px;color:#544728;font-size:11px;text-decoration:none;white-space:nowrap}.textbook-actions button:hover,.textbook-actions a:hover{background:#eee9d9}@media(max-width:600px){.textbook-dialog{width:calc(100vw - 16px);height:calc(100svh - 16px);border-radius:11px}.textbook-header{padding:13px 15px 10px}.textbook-header h2{font-size:17px}.textbook-header .icon-button{width:44px;height:44px}.textbook-stage{padding:9px}.textbook-stage img{max-height:calc(100svh - 170px)}.textbook-footer{padding:8px 12px}.textbook-footer>span{display:none}.textbook-actions{width:100%;justify-content:space-between}.textbook-actions button,.textbook-actions a{min-height:44px;font-size:11px}}