:root{--shell-page-width:210mm;--shell-page-height:297mm;--shell-page-margin:8mm;--shell-content-width:194mm;--shell-screen-card-width:194mm;--shell-screen-card-height:297mm;--shell-card-padding-y:40px;--shell-card-padding-x:36px;--shell-header-height:96px;--shell-header-gap:20px;--shell-print-offset-safari-cn-en:14mm;--shell-print-offset-safari-tem:14mm;--shell-print-offset-safari-math:14mm;--shell-safari-print-extra-top:0mm;--shell-cn-en-print-top-extra:0mm;--shell-tem-print-top-extra:0mm;--shell-math-print-top-extra:0mm;--shell-bg:#eeeff2;--shell-card-bg:#fff;--shell-card-border:#e6e6e8;--shell-card-shadow:0 6px 18px rgba(0,0,0,.12);--mobile-fixed-panel-height:300px}body{background:var(--shell-bg)!important}.container{display:flex!important;width:min(96%,calc(var(--shell-content-width) + 360px))!important;max-width:calc(var(--shell-content-width) + 360px)!important;margin:18px auto 0!important;padding:0!important;gap:20px!important;align-items:flex-start!important;background:transparent!important}.left-panel{width:var(--shell-content-width)!important;max-width:var(--shell-content-width)!important;flex:0 0 var(--shell-content-width)!important;margin:0!important;padding:var(--shell-card-padding-y) var(--shell-card-padding-x)!important;background:var(--shell-card-bg)!important;border:1px solid var(--shell-card-border)!important;box-shadow:var(--shell-card-shadow)!important;box-sizing:border-box!important;overflow:visible!important}@media screen{html:not(.is-category-list-page) .left-panel{width:var(--shell-screen-card-width)!important;max-width:var(--shell-screen-card-width)!important;flex:0 0 var(--shell-screen-card-width)!important;min-height:var(--shell-screen-card-height)!important}html.is-math-page:not(.is-category-list-page) .left-panel{height:var(--shell-screen-card-height)!important;min-height:var(--shell-screen-card-height)!important;overflow:hidden!important}html.is-category-list-page .left-panel{height:auto!important;min-height:0!important;overflow:visible!important}}@media screen and (max-width:900px){html.has-mobile-fixed-panel body{padding-bottom:0!important;margin-bottom:0!important}.container{display:block!important;width:100%!important;max-width:100%!important;margin:10px auto 0!important;padding:0!important;gap:0!important;background:#fff!important;border-radius:0 0 14px 14px!important;overflow-x:auto!important;overflow-y:auto!important;scrollbar-width:none!important;-ms-overflow-style:none!important;-webkit-overflow-scrolling:touch!important;overscroll-behavior:contain!important;touch-action:pan-x pan-y!important}.container::-webkit-scrollbar{width:0!important;height:0!important;display:none!important;background:transparent!important}html.has-mobile-fixed-panel .container{height:calc(100dvh - 62px - var(--mobile-fixed-panel-height, 300px))!important;min-height:220px!important;margin-bottom:0!important;padding-bottom:0!important}html:not(.has-mobile-fixed-panel):not(.menu-mobile-open):not(.is-category-list-page),html:not(.has-mobile-fixed-panel):not(.menu-mobile-open):not(.is-category-list-page) body{overflow-y:auto!important;overflow-x:hidden!important;height:auto!important}html:not(.has-mobile-fixed-panel):not(.is-category-list-page) .container{height:auto!important;min-height:0!important;overflow-y:visible!important;overflow-x:auto!important}html.is-category-list-page:not(.menu-mobile-open),html.is-category-list-page:not(.menu-mobile-open) body{overflow:hidden!important;height:100dvh!important}html.is-category-list-page .container{height:calc(100dvh - 62px)!important;min-height:220px!important;overflow-y:auto!important;overflow-x:auto!important;-webkit-overflow-scrolling:touch!important;overscroll-behavior:contain!important;touch-action:pan-x pan-y!important}html.is-category-list-page .left-panel{height:auto!important;min-height:0!important;overflow:visible!important;margin:0 12px 12px!important}html:not(.is-category-list-page) .left-panel{width:var(--shell-screen-card-width)!important;max-width:var(--shell-screen-card-width)!important;min-width:var(--shell-screen-card-width)!important;flex:0 0 auto!important;min-height:var(--shell-screen-card-height)!important;height:auto!important;padding:var(--shell-card-padding-y) var(--shell-card-padding-x)!important;margin:0 12px!important;overflow:visible!important}html.has-mobile-fixed-panel:not(.is-category-list-page) .left-panel{min-height:var(--shell-screen-card-height)!important;height:var(--shell-screen-card-height)!important;overflow:hidden!important}html.is-math-page:not(.is-category-list-page) .left-panel{min-height:var(--shell-screen-card-height)!important;height:auto!important;overflow:visible!important}html.has-mobile-fixed-panel.is-math-page:not(.is-category-list-page) .left-panel{min-height:var(--shell-screen-card-height)!important;height:var(--shell-screen-card-height)!important;overflow:hidden!important}.header-info{height:var(--shell-header-height)!important;min-height:var(--shell-header-height)!important;margin-bottom:var(--shell-header-gap)!important}.header-info h1{font-size:24px!important}}#pages-container,.page-content-slot,.print-page{width:100%!important}.left-panel>:not(.header-info):not(script):not(style):not(.modal-overlay):not(.content-modal){width:100%!important;max-width:100%!important;margin-left:auto!important;margin-right:auto!important;box-sizing:border-box!important}.header-info{height:var(--shell-header-height)!important;box-sizing:border-box!important;margin:0 0 var(--shell-header-gap)!important;text-align:left!important;line-height:30px!important;break-before:auto!important}.header-info h1,.header-info p{margin:0!important}.header-info h1{font-size:24px!important;display:inline!important;font-family:黑体,SimHei,sans-serif!important;line-height:1.2!important}.header-info p{font-size:14px!important;font-family:宋体,SimSun,serif!important;line-height:1.2!important}.header-info p.inline{display:inline!important;font-weight:700!important;font-family:楷体,KaiTi,serif!important;line-height:1.2!important}.header-info p.block{display:block!important;margin-top:10px!important;font-family:黑体,SimHei,sans-serif!important;line-height:1.2!important}html.is-math-page .left-panel .tracing-area .tracing-wrapper .sequence{font-size:14px!important;color:#d3d3d3!important;font-weight:400!important;line-height:1.5!important;display:inline-flex!important;align-items:center!important;align-self:center!important;width:2.8ch!important;min-width:2.8ch!important;margin-right:5px!important;text-align:left!important;font-variant-numeric:tabular-nums!important}@page{size:A4 portrait;margin:var(--shell-page-margin)}@media print{body,html{width:var(--shell-page-width)!important;height:var(--shell-page-height)!important;margin:0!important;padding:0!important;background:#fff!important;-webkit-print-color-adjust:exact!important;print-color-adjust:exact!important}.content-modal,.control-panel,.menu,.modal-overlay,.warning-box{display:none!important}.container{display:block!important;width:100%!important;max-width:100%!important;margin:0!important;padding:0!important;background:#fff!important}.left-panel{width:var(--shell-content-width)!important;max-width:var(--shell-content-width)!important;margin:0 auto!important;padding:var(--shell-card-padding-y) var(--shell-card-padding-x)!important;border:none!important;box-shadow:none!important;background:transparent!important}html.has-mobile-fixed-panel .left-panel{width:100%!important;max-width:100%!important;margin:0!important;border:0!important;box-shadow:none!important;background:transparent!important}html.has-mobile-fixed-panel #pages-container,html.has-mobile-fixed-panel .page-content-slot,html.has-mobile-fixed-panel .print-page{background:transparent!important;border:0!important;outline:0!important;box-shadow:none!important;border-radius:0!important}html.has-mobile-fixed-panel #pages-container>.print-page:before,html.has-mobile-fixed-panel .print-page:after,html.has-mobile-fixed-panel .print-page:before{content:none!important;display:none!important;width:0!important;height:0!important;border:0!important;box-shadow:none!important;background:transparent!important}.left-panel>:not(.header-info):not(script):not(style):not(.modal-overlay):not(.content-modal){width:100%!important;max-width:100%!important;margin-left:auto!important;margin-right:auto!important;box-sizing:border-box!important}body .container .left-panel.has-shell-print-pages{padding:0!important}body .container .left-panel.has-shell-print-pages .print-page{box-sizing:border-box!important;padding:var(--shell-card-padding-y) var(--shell-card-padding-x) 0!important}body .container .left-panel.has-shell-print-pages .print-page .header-info{break-before:auto!important}body .container .left-panel.has-shell-print-pages #pages-container{display:block!important}.print-page{break-after:page!important;break-inside:avoid!important}.print-page:last-child{break-after:auto!important}html.is-math-page .left-panel{padding-top:calc(var(--shell-card-padding-y) + var(--shell-math-print-top-extra))!important}html.is-math-page .left-panel.has-shell-print-pages{padding:0!important}html.is-math-page .left-panel.has-shell-print-pages .print-page{padding-top:calc(var(--shell-card-padding-y) + var(--shell-math-print-top-extra))!important}html.is-safari.is-cn-en-page{--shell-cn-en-print-top-extra:var(--shell-print-offset-safari-cn-en)}html.is-safari.is-cn-en-page .left-panel{padding-top:calc(var(--shell-card-padding-y) + var(--shell-cn-en-print-top-extra))!important}html.is-safari.is-cn-en-page .left-panel.has-shell-print-pages{padding:0!important}html.is-safari.is-cn-en-page .left-panel.has-shell-print-pages .print-page{padding-top:calc(var(--shell-card-padding-y) + var(--shell-cn-en-print-top-extra))!important}html.is-safari.is-tem-page{--shell-safari-print-extra-top:var(--shell-print-offset-safari-tem)}html.is-safari.is-tem-page .left-panel.has-shell-print-pages .print-page{padding-top:calc(var(--shell-card-padding-y) + var(--shell-safari-print-extra-top) + var(--shell-tem-print-top-extra))!important}html.is-safari.is-math-page{--shell-math-print-top-extra:var(--shell-print-offset-safari-math)}}