diff --git a/dist/mdtht.min.css b/dist/mdtht.min.css
index b0ed894..0fca624 100644
--- a/dist/mdtht.min.css
+++ b/dist/mdtht.min.css
@@ -10,5 +10,5 @@
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0;border-top:.1rem solid #d2d2d2;color:#999;margin:0;text-align:center}.note-tips::before{content:"©";font-size:1.2rem;vertical-align:middle;margin-right:.2rem}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-thumb{background:#d2d2d2;border-radius:4px}::-webkit-scrollbar-track{background:#ededef}body,#right-container,#list-container{scrollbar-width:thin;scrollbar-color:#d2d2d2 #ededef}html[theme=dark] ::-webkit-scrollbar-thumb{background:#464b50}html[theme=dark] ::-webkit-scrollbar-track{background:#282a32}html[theme=dark] body,html[theme=dark] #right-container,html[theme=dark] #list-container{scrollbar-color:#464b50 #282a32}html[theme=dark] #body-container{background:#1b1b1f}html[theme=dark] strong{color:white}html[theme=dark] kbd{background-color:#f59102}html[theme=dark] blockquote,html[theme=dark] .md-alert{background:rgba(62,105,215,0.12)}html[theme=dark] blockquote code,html[theme=dark] .md-alert code{background:rgba(62,105,215,0.12)}html[theme=dark] blockquote blockquote{background:rgba(62,105,215,0.12)}html[theme=dark] .md-alert.md-alert-note{background:rgba(62,105,215,0.12)}html[theme=dark] .md-alert.md-alert-caution{background:rgba(245,145,2,0.12)}html[theme=dark] .md-alert.md-alert-tip{background:rgba(3,183,54,0.12)}html[theme=dark] .md-alert.md-alert-important{background:rgba(130,80,223,0.12)}html[theme=dark] .md-alert.md-alert-warning{background:rgba(227,15,46,0.12)}html[theme=dark] code,html[theme=dark] pre{background:#282a32;border-color:#282a32}html[theme=dark] table{width:100%;margin-top:1.6rem;text-align:left;border-collapse:separate;border-spacing:0;border-radius:.8rem;overflow:hidden;padding:0;border:1px solid #373a3f}html[theme=dark] table thead tr th{background:#282a32}html[theme=dark] table tbody tr:nth-child(even) td{background:#282a32}html[theme=dark] table tbody tr:nth-child(odd) td{background:#fafafa}html[theme=dark] table tr th,html[theme=dark] table tr td{padding:10px;word-break:break-word}html[theme=dark] table tr td,html[theme=dark] table thead tr th{border-left:1px solid #373a3f}html[theme=dark] table tbody tr td:first-of-type,html[theme=dark] table thead tr th:first-of-type{border-left:none}
+.bottom-container .quit-menu{margin-right:0!important}.bottom-container .iconfont{font-size:2rem;line-height:4rem}.bottom-container .iconfont:hover{color:#f59102;cursor:pointer;text-shadow:none}.bottom-container .icon-quit{font-size:2.2rem}.structure:hover .structure-child{height:20.8rem;bottom:4rem;padding:1rem 1.5rem 0;border:.1rem solid #d2d2d2;border-radius:.6rem;-webkit-border-radius:.6rem;-moz-border-radius:.6rem;border-bottom-left-radius:0;border-bottom-right-radius:0;border-bottom-color:#fafafa;box-shadow:0 -0.2rem .1rem rgba(217,217,217,0.7);-webkit-box-shadow:0 -0.2rem .1rem rgba(217,217,217,0.7);-moz-box-shadow:0 -0.2rem .1rem rgba(217,217,217,0.7);-o-box-shadow:0 -0.2rem .1rem rgba(217,217,217,0.7)}.structure-child{height:0;background:#fafafa;padding:0 1.5rem 0;margin:0;position:absolute;z-index:30;bottom:4rem;left:-5rem;box-sizing:border-box;overflow:hidden;transition:height .1s linear;-moz-transition:height .1s linear;-webkit-transition:height .1s linear;-o-transition:height .1s linear}.structure-child li{margin-left:0!important;padding:0 1rem;cursor:pointer;overflow:hidden;margin-bottom:.8rem;text-align:left;white-space:nowrap;position:relative;box-sizing:border-box}.structure-child li:hover{color:#f59102}.structure-child li:hover input[type=radio]{border-color:#f59102}.structure-child li:hover input[type=radio]:checked{border-color:#f59102;background:#f59102!important}.structure-child li:first-child,.structure-child li:nth-of-type(1),.structure-child li:nth-of-type(2),.structure-child li:nth-of-type(3){padding-bottom:.8rem;border-bottom:.1rem dashed #d2d2d2}.structure-child li:first-child label,.structure-child li:nth-of-type(1) label,.structure-child li:nth-of-type(2) label,.structure-child li:nth-of-type(3) label{margin-left:-0.8rem}.structure-child li:last-child{padding-bottom:.8rem;margin-bottom:0;border-bottom:.1rem dashed #d2d2d2}.structure-child li label{font-size:1.2rem!important;vertical-align:bottom;cursor:pointer}.structure-child li input[type=radio]{width:1.2rem;height:1.2rem;border:.1rem solid #3e69d7;border-radius:50%;-webkit-border-radius:50%;-moz-border-radius:50%;cursor:not-allowed;margin-left:0}#switch-button{position:absolute;z-index:110;width:3.4rem;height:0;top:0;left:0;overflow:hidden;cursor:pointer;text-align:center;box-sizing:border-box;transition:height .2s linear;-moz-transition:height .2s linear;-webkit-transition:height .2s linear;-o-transition:height .2s linear}#switch-button i{display:block;position:absolute;color:#3e69d7;font-size:4rem}#switch-button .icon-label{top:-1.3rem;left:-0.2rem;text-shadow:0 0 .3rem rgba(27,27,31,0.5)}#switch-button .icon-catalog-close{top:.2rem;left:.85rem;font-size:1.6rem;font-weight:bold;color:#fafafa;text-shadow:none}#switch-button:hover .icon-label{color:#f59102}#content>footer{margin-top:7.2rem;box-sizing:border-box}.note-tips{font-size:.9rem;padding:1.1rem 0;border-top:.1rem solid #d2d2d2;color:#999;margin:0;text-align:center}.note-tips::before{content:"©";font-size:1.2rem;vertical-align:middle;margin-right:.2rem}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:#d2d2d2;border-radius:4px}::-webkit-scrollbar-track{background:#ededef}body,#right-container,#list-container{scrollbar-width:thin;scrollbar-color:#d2d2d2 #ededef}html[theme=dark] ::-webkit-scrollbar-thumb{background:#464b50}html[theme=dark] ::-webkit-scrollbar-track{background:#282a32}html[theme=dark] body,html[theme=dark] #right-container,html[theme=dark] #list-container{scrollbar-color:#464b50 #282a32}html[theme=dark] #body-container{background:#1b1b1f}html[theme=dark] strong{color:white}html[theme=dark] kbd{background-color:#f59102}html[theme=dark] blockquote,html[theme=dark] .md-alert{background:rgba(62,105,215,0.12)}html[theme=dark] blockquote code,html[theme=dark] .md-alert code{background:rgba(62,105,215,0.12)}html[theme=dark] blockquote blockquote{background:rgba(62,105,215,0.12)}html[theme=dark] .md-alert.md-alert-note{background:rgba(62,105,215,0.12)}html[theme=dark] .md-alert.md-alert-caution{background:rgba(245,145,2,0.12)}html[theme=dark] .md-alert.md-alert-tip{background:rgba(3,183,54,0.12)}html[theme=dark] .md-alert.md-alert-important{background:rgba(130,80,223,0.12)}html[theme=dark] .md-alert.md-alert-warning{background:rgba(227,15,46,0.12)}html[theme=dark] code,html[theme=dark] pre{background:#282a32;border-color:#282a32}html[theme=dark] table{width:100%;margin-top:1.6rem;text-align:left;border-collapse:separate;border-spacing:0;border-radius:.8rem;overflow:hidden;padding:0;border:1px solid #373a3f}html[theme=dark] table thead tr th{background:#282a32}html[theme=dark] table tbody tr:nth-child(even) td{background:#282a32}html[theme=dark] table tbody tr:nth-child(odd) td{background:#fafafa}html[theme=dark] table tr th,html[theme=dark] table tr td{padding:10px;word-break:break-word}html[theme=dark] table tr td,html[theme=dark] table thead tr th{border-left:1px solid #373a3f}html[theme=dark] table tbody tr td:first-of-type,html[theme=dark] table thead tr th:first-of-type{border-left:none}
 html[theme=dark] table tbody tr:nth-child(odd) td{background:#1b1b1f}html[theme=dark] input{background:#282a32;border-color:#373a3f;color:#d0d0d0}html[theme=dark] input::placeholder{color:#999}html[theme=dark] input[type=checkbox],html[theme=dark] input[type=radio]{background:#1b1b1f}html[theme=dark] .iconfont{color:#373a3f;text-shadow:.1rem .1rem .1rem #282a32}html[theme=dark] .iconfont:hover{text-shadow:.1rem .1rem .1rem rgba(62,105,215,0.2)}html[theme=dark] .note-tips{border-color:#373a3f;color:#373a3f}html[theme=dark] #right-container,html[theme=dark] #left-container,html[theme=dark] .top-container,html[theme=dark] .bottom-container{background:#1b1b1f;color:#d0d0d0;border-color:#373a3f}html[theme=dark] .list-wrapper .iconfont{color:#373a3f;background:#1b1b1f}html[theme=dark] .list-wrapper a{color:#d0d0d0}html[theme=dark] .list-wrapper ul:after,html[theme=dark] .list-wrapper ul:before,html[theme=dark] .list-wrapper li:after,html[theme=dark] .list-wrapper li:before,html[theme=dark] .list-wrapper a:after,html[theme=dark] .list-wrapper a:before{background:#373a3f}html[theme=dark] .list-wrapper ul li:hover>a{background:#282a32}html[theme=dark] .list-wrapper ul li ul li:last-child:before,html[theme=dark] .list-wrapper>ul>li:first-child>a:after,html[theme=dark] .list-wrapper>ul li:last-child>a:after,html[theme=dark] .list-wrapper>ul>li:last-child:after,html[theme=dark] .list-wrapper>ul>li:last-child>a:after{background:#1b1b1f}html[theme=dark] .list-wrapper>ul li:last-child>a:before{border-color:#373a3f}html[theme=dark] .search::placeholder{color:rgba(208,208,208,0.4)}html[theme=dark] .search-result{background:#282a32;border-color:#373a3f;background:#282a32!important}html[theme=dark] .search-result a,html[theme=dark] .search-result i{color:rgba(208,208,208,0.4)!important}html[theme=dark] .js-search{box-shadow:0 0 .2rem .1rem rgba(62,105,215,0.15);-webkit-box-shadow:0 0 .2rem .1rem rgba(62,105,215,0.15);-moz-box-shadow:0 0 .2rem .1rem rgba(62,105,215,0.15);-o-box-shadow:0 0 .2rem .1rem rgba(62,105,215,0.15);color:rgba(208,208,208,0.4)!important}html[theme=dark] .js-search a{color:#d0d0d0!important}html[theme=dark] .js-search a:hover{color:#3e69d7!important;background:#282a32!important}html[theme=dark] .js-search i{color:rgba(153,153,153,0.4)!important}html[theme=dark] .search-icon{color:rgba(208,208,208,0.4);background:#282a32}html[theme=dark] .search-icon:hover{color:#3e69d7}html[theme=dark]:hover .structure-child{background:#1b1b1f;background:#1b1b1f;border-color:#373a3f;border-bottom-color:#1b1b1f;box-shadow:0 -0.2rem .1rem rgba(62,105,215,0.15);-webkit-box-shadow:0 -0.2rem .1rem rgba(62,105,215,0.15);-moz-box-shadow:0 -0.2rem .1rem rgba(62,105,215,0.15);-o-box-shadow:0 -0.2rem .1rem rgba(62,105,215,0.15)}html[theme=dark] .structure-child{background:#1b1b1f}html[theme=dark] .structure-child li:first-child,html[theme=dark] .structure-child li:nth-of-type(1),html[theme=dark] .structure-child li:nth-of-type(2),html[theme=dark] .structure-child li:nth-of-type(3),html[theme=dark] .structure-child li:last-child{border-color:#373a3f}html[theme=dark] #switch-button .icon-catalog-close{color:#d0d0d0}html[theme=dark] #switch-button .icon-label{text-shadow:0 0 .3rem rgba(0,0,0,0.8)}html[theme=dark] .js-close-shadow,html[theme=dark] .js-close-shadow .iconfont{text-shadow:none}html[theme=dark] .js-show-shadow,html[theme=dark] .js-show-shadow .iconfont{text-shadow:.2rem .2rem .2rem #000}html[theme=dark] .search-result .search-click{color:#f59102!important;background:#373a3f}html[theme=dark] .js-active>a{background:#373a3f!important}html[theme=dark] #list-container .js-active>a,html[theme=dark] .search-result .js-active{background:#282a32!important}html[theme=dark]{background-color:#1b1b1f;color:#d0d0d0}html[theme=dark] h1,html[theme=dark] h2,html[theme=dark] h3,html[theme=dark] h4,html[theme=dark] h5,html[theme=dark] h6{color:#d0d0d0}html[theme=dark] .js-level1-style{border-bottom:.1rem solid #373a3f}html[theme=dark] hr{background:#373a3f}html[theme=dark] u{text-decoration-color:#d0d0d0;-moz-text-decoration-color:#d0d0d0}html[theme=dark] code,html[theme=dark] code.hljs{color:#c9cffd;background:transparent}html[theme=dark] p code,html[theme=dark] table code,html[theme=dark] p code.hljs{background:rgba(61,104,213,0.15)}html[theme=dark] .hljs-comment{color:#667c89}@media print{table,pre{page-break-inside:avoid}pre{word-wrap:break-word}}@media screen and (max-width:768px){#left-container{position:absolute;top:0;left:0;height:100vh;display:none}#right-container{margin-left:0;padding:0 3.2rem}#switch-button{height:4rem}#content>footer{margin-top:3.2rem}}@media screen and (min-width:769px) and (max-width:1280px){#right-container{padding:0 6.4rem}}@media screen and (min-width:1921px){#body-container{max-width:256rem;margin:0 auto}}
\ No newline at end of file
diff --git a/src/scss/mdtht.scss b/src/scss/mdtht.scss
index 8f77599..9b2e946 100644
--- a/src/scss/mdtht.scss
+++ b/src/scss/mdtht.scss
@@ -1105,6 +1105,7 @@ input[type="radio"]:checked::after {
 /*scroll style*/
 ::-webkit-scrollbar {
   width: 8px;
+  height: 8px;
 }
 
 ::-webkit-scrollbar-thumb {