:root{--vt-c-white:#fff;--vt-c-white-soft:#f8f8f8;--vt-c-white-mute:#f2f2f2;--vt-c-black:#181818;--vt-c-black-soft:#222;--vt-c-black-mute:#282828;--vt-c-indigo:#2c3e50;--vt-c-divider-light-1:rgba(60,60,60,.29);--vt-c-divider-light-2:rgba(60,60,60,.12);--vt-c-divider-dark-1:rgba(84,84,84,.65);--vt-c-divider-dark-2:rgba(84,84,84,.48);--vt-c-text-light-1:var(--vt-c-indigo);--vt-c-text-light-2:rgba(60,60,60,.66);--vt-c-text-dark-1:var(--vt-c-white);--vt-c-text-dark-2:hsla(0,0%,92%,.64);--color-background:var(--vt-c-white);--color-background-soft:var(--vt-c-white-soft);--color-background-mute:var(--vt-c-white-mute);--color-border:var(--vt-c-divider-light-2);--color-border-hover:var(--vt-c-divider-light-1);--color-heading:var(--vt-c-text-light-1);--color-text:var(--vt-c-text-light-1);--section-gap:160px}@media (prefers-color-scheme:dark){:root{--color-background:var(--vt-c-black);--color-background-soft:var(--vt-c-black-soft);--color-background-mute:var(--vt-c-black-mute);--color-border:var(--vt-c-divider-dark-2);--color-border-hover:var(--vt-c-divider-dark-1);--color-heading:var(--vt-c-text-dark-1);--color-text:var(--vt-c-text-dark-2)}}*,:after,:before{box-sizing:border-box;font-weight:400;margin:0;position:relative}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Helvetica Neue,Helvetica,Arial,Microsoft Yahei,Hiragino Sans GB,Heiti SC,WenQuanYi Micro Hei,sans-serif;font-size:15px;line-height:1.6;min-height:100vh;text-rendering:optimizeLegibility;transition:color .5s,background-color .5s}a,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,em,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,object,ol,output,p,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video{border:0;font-size:100%;margin:0;padding:0;vertical-align:baseline}article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}body{line-height:1}ol,ul{list-style:none}blockquote,q{quotes:none}blockquote:after,blockquote:before,q:after,q:before{content:"";content:none}table{border-collapse:collapse;border-spacing:0}a{color:inherit;text-decoration:none}.main-wrap{flex-shrink:0;margin:0 auto;width:1200px}.ellipsis-1{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ellipsis-2{-webkit-line-clamp:2}.ellipsis-2,.ellipsis-3{-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden;text-overflow:ellipsis}.ellipsis-3{-webkit-line-clamp:3}.container{min-width:1200px}.page-main{min-height:calc(100vh - 558px)}.el-backtop{background:#f7f8fa;border:1px solid #e5e6eb;border-radius:6px;box-sizing:border-box;height:56px!important;width:56px!important}.el-backtop .back-top{border-radius:6px;height:50px;width:50px}.el-backtop .back-top img{width:100%}