*,*::before,*::after{box-sizing:border-box}body{margin:0;font-family:Times,"Times New Roman","Linux Libertine",Georgia,"Noto Serif","Liberation Serif","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans Serif CJK SC","Source Han Sans CN",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";font-size:1rem;font-weight:400;line-height:1.75;color:#424242;background-color:#fff;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:rgba(0,0,0,0);word-wrap:break-word;tab-size:4;-moz-tab-size:4}progress{vertical-align:baseline}[hidden]{display:none !important}h1,h2,blockquote,.tasklist li::before{font-family:"Linux Libertine",Georgia,Times,"Times New Roman","Noto Serif","Liberation Serif","Noto Serif CJK SC",SimSun,"宋体",STSong,"华文宋体",serif}abbr[title]{text-decoration:underline dotted;cursor:help;text-decoration-skip-ink:none}abbr{text-decoration:underline dotted}address{margin-bottom:1rem;font-style:normal;line-height:inherit}b,strong{font-weight:700}small{font-size:.875em}mark{padding:0 .25em;background-color:#ffeb3b}sub,sup{position:relative;font-size:.75em;line-height:0;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}a{color:#0277bd;text-decoration:none}a:visited{color:#0252d6}a:hover{color:#dd2c00;text-decoration:underline}a.external{background-position:100% 80%;background-repeat:no-repeat;background-size:1em 1em;background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3e%3cpath fill='%23757575' d='M14,3V5H17.59L7.76,14.83L9.17,16.24L19,6.41V10H21V3M19,19H5V5H12V3H5C3.89,3 3,3.9 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19V12H19V19Z'/%3e%3c/svg%3e");margin-right:1px;padding-right:1em}a.anchor-link{color:inherit;text-decoration:none}a:not([href]):not([class]),a:not([href]):not([class]):hover{color:inherit;text-decoration:none}p,li,blockquote,summary{text-align:justify}hr{margin:1rem 0;color:#000;background-color:currentColor;border:0;opacity:0.25}hr:not([size]){height:.25rem}p{margin-top:0;margin-bottom:1rem}blockquote{margin:0 0 1rem;background-color:#f5f5f5;padding:.5em 2.5em;position:relative}blockquote::before{content:'\275D';color:#b0bec5;position:absolute;top:0;left:0;font-size:3em;line-height:1.25;margin-left:.125em}blockquote::after{content:'\275E';color:#b0bec5;position:absolute;top:0;right:0;font-size:3em;line-height:1.25;margin-right:.125em}blockquote>:last-child{margin-bottom:0}summary{display:list-item;cursor:pointer}h1,h2,h3,h4,h5,h6{margin-top:0;margin-bottom:.5em;font-weight:600;line-height:1.2}h1:target a.anchor-link,h2:target a.anchor-link,h3:target a.anchor-link,h4:target a.anchor-link,h5:target a.anchor-link,h6:target a.anchor-link{color:#0277bd}h1{font-size:calc(1.325rem + .9vw);border-bottom:2px solid #e0e0e0}@media (min-width: 1200px){h1{font-size:2rem}}h2{font-size:calc(1.2875rem + .45vw);border-bottom:1px solid #e0e0e0}@media (min-width: 1200px){h2{font-size:1.625rem}}h3{font-size:1.25rem;color:#424242}h4{font-size:1.125rem;color:#616161;font-weight:700}h5{font-size:1rem;color:#757575;font-weight:700}h6{font-size:1rem;color:#9e9e9e;font-weight:700}pre,code,kbd,samp{font-family:SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:1em;direction:ltr /* rtl:ignore */;unicode-bidi:bidi-override}pre{background-color:#f5f5f5;display:block;margin-top:0;margin-bottom:1rem;overflow:auto;font-size:.875em;padding:.25rem .5rem;border-left:0.375rem solid #b0bec5;border-radius:.25rem}pre code{font-size:inherit;color:inherit;background-color:inherit;word-break:normal;padding:0}code{color:#00796b;background-color:#f5f5f5;word-wrap:break-word;padding:0 .25em}a>code{color:inherit}kbd{line-height:1;padding:.25rem .25rem .125rem;font-size:.875em;color:#424242;background-color:#f5f5f5;border:1px solid #e0e0e0;border-bottom-color:#90a4ae;border-radius:.2rem;box-shadow:inset 0 -1px 0 #90a4ae;display:inline-block;vertical-align:middle}.gallery,figure{margin:0 0 1rem;padding:.25rem;border:1px solid #e0e0e0;width:auto;position:relative;z-index:1}.gallery img,.gallery figcaption,.gallery p,.gallery h1,.gallery h2,.gallery h3,.gallery h4,.gallery h5,.gallery h6,.gallery .description,figure img,figure figcaption,figure p,figure h1,figure h2,figure h3,figure h4,figure h5,figure h6,figure .description{margin:0 0 .5rem}.gallery img:last-child,.gallery figcaption:last-child,.gallery p:last-child,.gallery h1:last-child,.gallery h2:last-child,.gallery h3:last-child,.gallery h4:last-child,.gallery h5:last-child,.gallery h6:last-child,.gallery .description:last-child,figure img:last-child,figure figcaption:last-child,figure p:last-child,figure h1:last-child,figure h2:last-child,figure h3:last-child,figure h4:last-child,figure h5:last-child,figure h6:last-child,figure .description:last-child{margin-bottom:0}.gallery figcaption,.gallery p,.gallery h1,.gallery h2,.gallery h3,.gallery h4,.gallery h5,.gallery h6,.gallery .description,figure figcaption,figure p,figure h1,figure h2,figure h3,figure h4,figure h5,figure h6,figure .description{width:100%;clear:both}.gallery p,.gallery .description,figure p,figure .description{font-size:.875rem;color:#757575}.gallery p a,.gallery .description a,figure p a,figure .description a{color:#039be5}.gallery p a:visited,.gallery .description a:visited,figure p a:visited,figure .description a:visited{color:#066efc}.gallery p a:hover,.gallery .description a:hover,figure p a:hover,figure .description a:hover{color:#ff3d00}.gallery figcaption,.gallery figcaption p,.gallery figcaption h1,.gallery figcaption h2,.gallery figcaption h3,.gallery figcaption h4,.gallery figcaption h5,.gallery figcaption h6,figure figcaption,figure figcaption p,figure figcaption h1,figure figcaption h2,figure figcaption h3,figure figcaption h4,figure figcaption h5,figure figcaption h6{font-size:1rem;font-weight:700;color:#546e7a}figure{background-color:#f5f5f5;display:inline-block;width:auto;max-width:100%}figure img{border:1px solid #e0e0e0}img,svg{vertical-align:middle;max-width:100%;height:auto}img.text-img,svg.text-img{max-height:1.25em;width:auto}img{background-color:#fff}.gallery{background-color:#fff;padding:.25rem;display:flex;align-items:flex-end;justify-content:flex-start;flex-wrap:wrap}.gallery figure{max-width:100%}.gallery.figure-1 figure,.gallery.figure-5 figure,.gallery.figure-6 figure{max-width:50%}@media screen and (min-width: 960px){figure.float-right{max-width:45%;clear:right;float:right;margin:0 0 1rem 1rem}figure.float-left{max-width:45%;clear:left;float:left;margin:0 1rem 1rem 0}figure.center{clear:both;margin-left:auto;margin-right:auto}figure.figure-1v6{max-width:16.666%}figure.figure-1v5{max-width:20%}figure.figure-1v4{max-width:25%}figure.figure-1v3{max-width:33.333%}figure.figure-2v5{max-width:40%}figure.figure-1v2,figure.figure-half{max-width:50%}figure.figure-3v5{max-width:60%}figure.figure-2v3{max-width:66.666%}figure.figure-3v4{max-width:75%}figure.figure-4v5{max-width:80%}figure.figure-5v6{max-width:83.333%}figure.figure-1v1,figure.figure-full{max-width:100%}.gallery.figure-6 figure{max-width:16.666%}.gallery.figure-5 figure{max-width:20%}.gallery.figure-4 figure{max-width:25%}.gallery.figure-3 figure,.gallery figure{max-width:33.333%}.gallery.figure-2 figure{max-width:50%}.gallery.figure-1 figure{max-width:100%}}ol,ul{padding-left:2rem}ol,ul,dl{margin-top:0;margin-bottom:1rem}ol ol,ul ul,ol ul,ul ol{margin-bottom:0;margin-top:.25rem}dl{padding-left:1rem;text-align:justify}dt{font-weight:700}dt:before{content:"\2605";margin-right:.5rem}dd{margin-left:0;margin-top:.25rem}li{word-wrap:break-word}li:not(:first-child){margin-top:.25rem}li p{margin-bottom:.25rem}li p:last-child{margin-bottom:0}ul{list-style:disc}ol ul,ul ul{list-style:circle}ol ol,ul ol{list-style-type:lower-roman}ol ol ul,ol ul ul,ul ol ul,ul ul ul{list-style-type:square}ol ol ol,ol ul ol,ul ol ol,ul ul ol{list-style-type:lower-alpha}.tasklist{padding-left:1rem}.tasklist li{list-style-type:none}.tasklist li:before{content:'\2610';margin-right:.5rem}.tasklist li.checked:before{content:'\2611'}.tasklist li.canceled:before{content:'\2612'}table{caption-side:bottom;border-collapse:collapse;border-top:3px solid #90caf9;border-bottom:3px solid #90caf9;min-width:100%;margin-bottom:1rem}.table-wrapper{overflow-x:auto;margin-bottom:1rem}.table-wrapper table{margin-bottom:.25rem}thead,tbody,tfoot,tr,td,th{border:1px solid #90caf9}caption{padding-top:.5rem;padding-bottom:.25rem;color:#616161;font-weight:700;text-align:left;caption-side:top}th{text-align:inherit;text-align:-webkit-match-parent}td,th{padding:.25rem .5rem;vertical-align:middle}table p{margin-bottom:.5rem}table p:last-child{margin-bottom:0}tr:hover{background-color:#e3f2fd}@media screen and (min-width: 960px){table{min-width:50%}}var,.var,.math,.formula,.latex{font-family:"Nimbus Roman No9 L",Times,"Times New Roman","Linux Libertine",Georgia,"Noto Serif","Liberation Serif",serif}var .text,.var .text,.math .text,.formula .text,.latex .text{font-style:normal}var,.var{padding:0 1px}.formula{display:inline-flex;align-items:center}.blockformula{display:flex;align-items:center}.blockformula .formula,.blockformula .number{display:inline-flex;align-items:center}.blockformula .formula{flex:auto;justify-content:center}.blockformula .number{flex:none}.row{display:flex}.lg-row{display:flex;flex-wrap:wrap}.wrap-row{display:flex;flex-wrap:wrap}.lg-col-1,.lg-col-2,.lg-col-3,.lg-col-4,.lg-col-5,.lg-col-6,.lg-col-7,.lg-col-8,.lg-col-9,.lg-col-10,.lg-col-11,.lg-col-12,.lg-col,.lg-col-auto,.lg-col-none,.col-1,.col-2,.col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9,.col-10,.col-11,.col-12,.col,.col-auto,.col-none{min-height:1px}.lg-col-1,.lg-col-2,.lg-col-3,.lg-col-4,.lg-col-5,.lg-col-6,.lg-col-7,.lg-col-8,.lg-col-9,.lg-col-10,.lg-col-11,.lg-col-12,.lg-col,.lg-col-auto,.lg-col-none{flex:1 1 100%;max-width:100%}.col{flex:1 1 100%;max-width:100%}.col-auto{flex:auto;max-width:100%}.col-none{flex:none}.col-1{flex:0 0 8.33333%;max-width:8.33333%}.col-2{flex:0 0 16.66667%;max-width:16.66667%}.col-3{flex:0 0 25%;max-width:25%}.col-4{flex:0 0 33.33333%;max-width:33.33333%}.col-5{flex:0 0 41.66667%;max-width:41.66667%}.col-6{flex:0 0 50%;max-width:50%}.col-7{flex:0 0 58.33333%;max-width:58.33333%}.col-8{flex:0 0 66.66667%;max-width:66.66667%}.col-9{flex:0 0 75%;max-width:75%}.col-10{flex:0 0 83.33333%;max-width:83.33333%}.col-11{flex:0 0 91.66667%;max-width:91.66667%}.col-12{flex:0 0 100%;max-width:100%}@media screen and (min-width: 960px){.lg-row{flex-wrap:nowrap}.lg-col{flex:1 1 100%;max-width:100%}.lg-col-auto{flex:auto;max-width:100%}.lg-col-none{flex:none}.lg-col-1{flex:0 0 8.33333%;max-width:8.33333%}.lg-col-2{flex:0 0 16.66667%;max-width:16.66667%}.lg-col-3{flex:0 0 25%;max-width:25%}.lg-col-4{flex:0 0 33.33333%;max-width:33.33333%}.lg-col-5{flex:0 0 41.66667%;max-width:41.66667%}.lg-col-6{flex:0 0 50%;max-width:50%}.lg-col-7{flex:0 0 58.33333%;max-width:58.33333%}.lg-col-8{flex:0 0 66.66667%;max-width:66.66667%}.lg-col-9{flex:0 0 75%;max-width:75%}.lg-col-10{flex:0 0 83.33333%;max-width:83.33333%}.lg-col-11{flex:0 0 91.66667%;max-width:91.66667%}.lg-col-12{flex:0 0 100%;max-width:100%}}body{min-width:300px;position:relative}.container{margin-right:auto;margin-left:auto;position:relative;width:100%;min-width:300px;max-width:1152px}.page-main{margin-top:.5rem;margin-bottom:.5rem}.main-content{min-height:75vh}@media screen and (min-width: 960px){.page-main{margin-top:1rem;margin-bottom:1rem}.main-content-with-sidebar{margin-right:1.5rem}}.icon{font-size:inherit;max-width:4em;height:1.125em;width:1.125em;display:inline;vertical-align:-0.2em;stroke-width:0;fill:currentColor}a .icon:hover{text-decoration:none}.pop{position:relative}.pop .turn-on-symbol{display:inline}.pop .turn-off-symbol{display:none}.pop .pop-button{user-select:none}.pop .dropdown-arrow{border-left:.125rem solid;border-bottom:.125rem solid;content:"";height:.375rem;width:.375rem;margin-left:.375rem;transform:rotate(-45deg)}.pop>.popped{position:absolute;z-index:1;display:none}.pop.on .turn-on-symbol,.pop.hoverable:hover .turn-on-symbol{display:none}.pop.on .turn-off-symbol,.pop.hoverable:hover .turn-off-symbol{display:inline}.pop.on>.dropdown-button>.dropdown-arrow,.pop.hoverable:hover>.dropdown-button>.dropdown-arrow{transform:rotate(135deg)}.pop.on>.popped,.pop.hoverable:hover>.popped{display:block}.onoff{position:relative}.onoff .turn-on-symbol{display:inline}.onoff .turn-off-symbol{display:none}.onoff>.onoff-content{display:none}.onoff .onoff-button{user-select:none;text-decoration:none}.onoff.on .turn-on-symbol,.onoff.hoverable:hover .turn-on-symbol{display:none}.onoff.on .turn-off-symbol,.onoff.hoverable:hover .turn-off-symbol{display:inline}.onoff.on>.onoff-content,.onoff.hoverable:hover>.onoff-content{display:block}.text-light{color:#757575}.text-light a{color:#039be5}.text-light a:visited{color:#066efc}.text-light a:hover{color:#ff3d00}.text-lighter{color:#bdbdbd}.text-lighter a{color:#4fc3f7}.text-lighter a:visited{color:#67a7f8}.text-lighter a:hover{color:#ff6e40}.text-gray{color:#424242}.text-gray a{color:#424242}.text-gray a:visited{color:#4f4f4f}.text-gray a:hover{color:#607d8b}.text-grayer{color:#757575}.text-grayer a{color:#757575}.text-grayer a:visited{color:#828282}.text-grayer a:hover{color:#78909c}.text-grayest{color:#bdbdbd}.text-grayest a{color:#bdbdbd}.text-grayest a:visited{color:#cacaca}.text-grayest a:hover{color:#90a4ae}.text-dim{color:#424242}.text-dim a{color:#546e7a}.text-dim a:visited{color:#5e7189}.text-dim a:hover{color:#78909c}.text-dimmer{color:#757575}.text-dimmer a{color:#78909c}.text-dimmer a:visited{color:#8794a7}.text-dimmer a:hover{color:#607d8b}.text-dimmest{color:#bdbdbd}.text-dimmest a{color:#90a4ae}.text-dimmest a:visited{color:#8794a7}.text-dimmest a:hover{color:#90a4ae}.text-xxxs{font-size:.5em}.text-xxs{font-size:.625em}.text-xs{font-size:.75em}.text-sm{font-size:.875em}.text-nm{font-size:1em}.text-lg{font-size:1.125em}.text-xl{font-size:1.25em}.text-xxl{font-size:1.5em}.text-xxxl{font-size:2em}.toc{margin-bottom:1rem}.toc .header{text-align:right;margin-bottom:.5rem}.toc a.onoff-button{background-color:#2196f3;color:#fff;padding:.25rem 0.25rem .25rem .75rem;display:inline-flex;align-items:center}.toc.on a.onoff-button{display:flex;justify-content:space-between}