@import url("https://fonts.googleapis.com/css2?family=Lato&family=Roboto+Condensed:wght@400;700&family=Source+Sans+Pro:wght@400;600;700;900&display=swap");.post-tag:hover,.tag:hover{background:var(--tag-hover);transition:background 0.35s ease-in-out}div.post-content .table-wrapper>table tbody tr td,div.post-content .table-wrapper>table thead th{padding:0.4rem 1rem;font-size:95%;white-space:nowrap}.license-wrapper>a:hover,.post-content a:not(.img-hyperlink):hover,.post-meta a:hover,.post a:hover code,.post-preview a:hover,#access-lastmod a:hover,footer a:hover,#search-results a:hover,#breadcrumb a:hover{color:#d2603a !important;border-bottom:1px solid #d2603a;text-decoration:none}.post-content a:not(.img-hyperlink),.post-meta a,.post-preview a,span>a,p>a,#search-results a{color:var(--link-color)}.post-content a:not(.img-hyperlink),.post-meta a{border-bottom:1px solid var(--link-underline-color)}.categories a:not(:hover),#page-category a:not(:hover),#tags a:not(:hover),#archives a:not(:hover),#access-lastmod a,#search-results a{border-bottom:none}h5,h4,h3,h2,h1,#search-results a{font-weight:400;font-family:'Lato', 'Microsoft Yahei', sans-serif}#post-wrapper h5,#post-wrapper h4,#post-wrapper h3,#post-wrapper h2{line-height:1.2;margin-bottom:1rem}sup:target,h5,h4,h3,h2{padding-top:3.5rem;margin-top:-2.5rem}/*!
* The syntax light mode typography colors
* v2.1
* https://github.com/cotes2020/jekyll-theme-chirpy
* © 2020 Cotes Chung
* MIT Licensed
*//*!
* The main dark mode styles
* v2.0
* https://github.com/cotes2020/jekyll-theme-chirpy
* © 2018-2019 Cotes Chung
* MIT Licensed
*/html:not([mode]),html[mode=light]{--body-bg: #fafafa;--mask-bg: #c1c3c5;--main-wrapper-bg: white;--main-border-color: #f3f3f3;--btn-border-color: #e9ecef;--text-color: #333333;--blockquote-border-color: #eee;--blockquote-text-color: #9a9a9a;--link-color: #2a408e;--link-underline-color: #dee2e6;--text-muted-color: gray;--tb-odd-bg: #fbfcfd;--tb-border-color: #eaeaea;--button-bg: #fff;--btn-backtotop-color: #686868;--btn-backtotop-border-color: #f1f1f1;--btn-box-shadow: #eaeaea;--checkbox-color: darkgrey;--checkbox-checked-color: #2796ff;--sidebar-bg: radial-gradient(
    circle,
    rgba(42, 30, 107, 1) 0%,
    rgba(35, 37, 46, 1) 100%);--nav-cursor-color: #fcfcfc;--topbar-wrapper-bg: white;--topbar-text-color: rgb(78, 78, 78);--search-wrapper-bg: #f5f5f5;--search-tag-bg: #f8f9fa;--search-icon-color: #c2c6cc;--input-focus-border-color: var(--btn-border-color);--post-list-text-color: dimgray;--btn-patinator-text-color: #555555;--btn-paginator-hover-color: #e9ecef;--btn-active-bg: #2a408e;--btn-active-border-color: #007bff;--btn-text-color: #f8f8f8;--btn-paginator-border-color: #f1f1f1;--btn-paginator-shadow: #4b92d2;--btn-share-hover-color: var(--link-color);--card-border-color: #f1f1f1;--card-box-shadow: rgba(234, 234, 234, 0.7686274509803922);--label-color: #808080;--relate-post-date: rgba(30, 55, 70, 0.4);--tag-bg: rgba(0, 0, 0, 0.075);--tag-border: #dee2e6;--tag-shadow: var(--btn-border-color);--tag-hover: rgb(222, 226, 230);--categories-hover-bg: var(--btn-border-color);--dash-color: silver;--timeline-color: rgba(0, 0, 0, 0.075);--timeline-node-bg: #c2c6cc;--timeline-year-dot-color: #ffffff;--footer-bg-color: #ffffff;--footnote-target-bg: lightcyan;--footer-link: #424242}html:not([mode]) .mode-toggle,html[mode=light] .mode-toggle{transform:none}html[mode=dark]{--main-wrapper-bg: rgb(27, 27, 30);--body-bg: var(--main-wrapper-bg);--topbar-wrapper-bg: rgb(39, 40, 43);--search-wrapper-bg: rgb(34, 34, 39);--search-icon-color: rgb(100, 102, 105);--input-focus-border-color: rgb(112, 114, 115);--mask-bg: rgb(68, 69, 70);--footer-bg-color: var(--main-wrapper-bg);--text-color: rgb(175, 176, 177);--text-muted-color: rgb(107, 116, 124);--link-color: rgb(138, 180, 248);--link-underline-color: rgb(82, 108, 150);--main-border-color: rgb(44, 45, 45);--button-bg: rgb(39, 40, 43);--blockquote-border-color: rgb(66, 66, 66);--blockquote-text-color: rgb(117, 117, 117);--btn-border-color: rgb(63, 65, 68);--btn-backtotop-color: var(--text-color);--btn-backtotop-border-color: var(--btn-border-color);--btn-box-shadow: var(--main-wrapper-bg);--card-header-bg: rgb(51, 50, 50);--label-color: rgb(108, 117, 125);--checkbox-color: var(--text-color);--checkbox-checked-color: var(--link-color);--nav-cursor-color: rgb(183, 182, 182);--sidebar-bg: radial-gradient(circle, #242424 0%, #1d1f27 100%);--topbar-text-color: var(--text-color);--post-list-text-color: rgb(175, 176, 177);--btn-patinator-text-color: var(--text-color);--btn-paginator-hover-color: rgb(64, 65, 66);--btn-active-bg: rgba(28, 52, 94, 1);--btn-active-border-color: rgb(66, 94, 138);--btn-text-color: var(--text-color);--btn-paginator-border-color: var(--btn-border-color);--btn-paginator-shadow: var(--main-wrapper-bg);--toc-highlight: rgb(116, 178, 243);--tag-bg: rgb(41, 40, 40);--tag-hover: rgb(43, 56, 62);--tb-odd-bg: rgba(42, 47, 53, 0.52);--tb-even-bg: rgb(31, 31, 34);--tb-border-color: var(--tb-odd-bg);--footnote-target-bg: rgb(63, 81, 181);--btn-share-color: #6c757d;--btn-share-hover-color: #bfc1ca;--relate-post-date: var(--text-muted-color);--card-bg: rgb(39, 40, 43);--card-border-color: rgb(53, 53, 60);--card-box-shadow: var(--main-wrapper-bg);--tag-border: rgb(59, 79, 88);--tag-shadow: rgb(32, 33, 33);--search-tag-bg: var(--tag-bg);--dash-color: rgb(63, 65, 68);--categories-border: rgb(64, 66, 69);--categories-hover-bg: rgb(73, 75, 76);--timeline-node-bg: rgb(150, 152, 156);--timeline-color: rgb(63, 65, 68);--timeline-year-dot-color: var(--timeline-color);--footer-link: rgb(171, 171, 171)}html[mode=dark] .post-content img{filter:brightness(90%)}html[mode=dark] hr{border-color:var(--main-border-color)}html[mode=dark] nav[data-toggle=toc] .nav-link.active,html[mode=dark] nav[data-toggle=toc] .nav-link.active:focus,html[mode=dark] nav[data-toggle=toc] .nav-link.active:hover,html[mode=dark] nav[data-toggle=toc] .nav>li>a:focus,html[mode=dark] nav[data-toggle=toc] .nav>li>a:hover{color:var(--toc-highlight) !important;border-left-color:var(--toc-highlight) !important}html[mode=dark] .categories.card,html[mode=dark] .list-group-item{background-color:var(--card-bg)}html[mode=dark] .categories .card-header{background-color:var(--card-header-bg)}html[mode=dark] .categories .list-group-item{border-left:none;border-right:none;padding-left:2rem;border-color:var(--categories-border)}html[mode=dark] .categories .list-group-item:last-child{border-bottom-color:var(--card-bg)}html[mode=dark] #archives li:nth-child(odd){background-image:linear-gradient(to left, #1a1a1e, #27272d, #27272d, #27272d, #1a1a1e)}html[mode=dark] .mode-toggle{transform:rotateY(180deg)}@media (prefers-color-scheme: dark){html:not([mode]),html[mode=dark]{--main-wrapper-bg: rgb(27, 27, 30);--body-bg: var(--main-wrapper-bg);--topbar-wrapper-bg: rgb(39, 40, 43);--search-wrapper-bg: rgb(34, 34, 39);--search-icon-color: rgb(100, 102, 105);--input-focus-border-color: rgb(112, 114, 115);--mask-bg: rgb(68, 69, 70);--footer-bg-color: var(--main-wrapper-bg);--text-color: rgb(175, 176, 177);--text-muted-color: rgb(107, 116, 124);--link-color: rgb(138, 180, 248);--link-underline-color: rgb(82, 108, 150);--main-border-color: rgb(44, 45, 45);--button-bg: rgb(39, 40, 43);--blockquote-border-color: rgb(66, 66, 66);--blockquote-text-color: rgb(117, 117, 117);--btn-border-color: rgb(63, 65, 68);--btn-backtotop-color: var(--text-color);--btn-backtotop-border-color: var(--btn-border-color);--btn-box-shadow: var(--main-wrapper-bg);--card-header-bg: rgb(51, 50, 50);--label-color: rgb(108, 117, 125);--checkbox-color: var(--text-color);--checkbox-checked-color: var(--link-color);--nav-cursor-color: rgb(183, 182, 182);--sidebar-bg: radial-gradient(circle, #242424 0%, #1d1f27 100%);--topbar-text-color: var(--text-color);--post-list-text-color: rgb(175, 176, 177);--btn-patinator-text-color: var(--text-color);--btn-paginator-hover-color: rgb(64, 65, 66);--btn-active-bg: rgba(28, 52, 94, 1);--btn-active-border-color: rgb(66, 94, 138);--btn-text-color: var(--text-color);--btn-paginator-border-color: var(--btn-border-color);--btn-paginator-shadow: var(--main-wrapper-bg);--toc-highlight: rgb(116, 178, 243);--tag-bg: rgb(41, 40, 40);--tag-hover: rgb(43, 56, 62);--tb-odd-bg: rgba(42, 47, 53, 0.52);--tb-even-bg: rgb(31, 31, 34);--tb-border-color: var(--tb-odd-bg);--footnote-target-bg: rgb(63, 81, 181);--btn-share-color: #6c757d;--btn-share-hover-color: #bfc1ca;--relate-post-date: var(--text-muted-color);--card-bg: rgb(39, 40, 43);--card-border-color: rgb(53, 53, 60);--card-box-shadow: var(--main-wrapper-bg);--tag-border: rgb(59, 79, 88);--tag-shadow: rgb(32, 33, 33);--search-tag-bg: var(--tag-bg);--dash-color: rgb(63, 65, 68);--categories-border: rgb(64, 66, 69);--categories-hover-bg: rgb(73, 75, 76);--timeline-node-bg: rgb(150, 152, 156);--timeline-color: rgb(63, 65, 68);--timeline-year-dot-color: var(--timeline-color);--footer-link: rgb(171, 171, 171)}html:not([mode]) .post-content img,html[mode=dark] .post-content img{filter:brightness(90%)}html:not([mode]) hr,html[mode=dark] hr{border-color:var(--main-border-color)}html:not([mode]) nav[data-toggle=toc] .nav-link.active,html:not([mode]) nav[data-toggle=toc] .nav-link.active:focus,html:not([mode]) nav[data-toggle=toc] .nav-link.active:hover,html:not([mode]) nav[data-toggle=toc] .nav>li>a:focus,html:not([mode]) nav[data-toggle=toc] .nav>li>a:hover,html[mode=dark] nav[data-toggle=toc] .nav-link.active,html[mode=dark] nav[data-toggle=toc] .nav-link.active:focus,html[mode=dark] nav[data-toggle=toc] .nav-link.active:hover,html[mode=dark] nav[data-toggle=toc] .nav>li>a:focus,html[mode=dark] nav[data-toggle=toc] .nav>li>a:hover{color:var(--toc-highlight) !important;border-left-color:var(--toc-highlight) !important}html:not([mode]) .categories.card,html:not([mode]) .list-group-item,html[mode=dark] .categories.card,html[mode=dark] .list-group-item{background-color:var(--card-bg)}html:not([mode]) .categories .card-header,html[mode=dark] .categories .card-header{background-color:var(--card-header-bg)}html:not([mode]) .categories .list-group-item,html[mode=dark] .categories .list-group-item{border-left:none;border-right:none;padding-left:2rem;border-color:var(--categories-border)}html:not([mode]) .categories .list-group-item:last-child,html[mode=dark] .categories .list-group-item:last-child{border-bottom-color:var(--card-bg)}html:not([mode]) #archives li:nth-child(odd),html[mode=dark] #archives li:nth-child(odd){background-image:linear-gradient(to left, #1a1a1e, #27272d, #27272d, #27272d, #1a1a1e)}html:not([mode]) .mode-toggle,html[mode=dark] .mode-toggle{transform:rotateY(180deg)}html[mode=light]{--body-bg: #fafafa;--mask-bg: #c1c3c5;--main-wrapper-bg: white;--main-border-color: #f3f3f3;--btn-border-color: #e9ecef;--text-color: #333333;--blockquote-border-color: #eee;--blockquote-text-color: #9a9a9a;--link-color: #2a408e;--link-underline-color: #dee2e6;--text-muted-color: gray;--tb-odd-bg: #fbfcfd;--tb-border-color: #eaeaea;--button-bg: #fff;--btn-backtotop-color: #686868;--btn-backtotop-border-color: #f1f1f1;--btn-box-shadow: #eaeaea;--checkbox-color: darkgrey;--checkbox-checked-color: #2796ff;--sidebar-bg: radial-gradient(
    circle,
    rgba(42, 30, 107, 1) 0%,
    rgba(35, 37, 46, 1) 100%);--nav-cursor-color: #fcfcfc;--topbar-wrapper-bg: white;--topbar-text-color: rgb(78, 78, 78);--search-wrapper-bg: #f5f5f5;--search-tag-bg: #f8f9fa;--search-icon-color: #c2c6cc;--input-focus-border-color: var(--btn-border-color);--post-list-text-color: dimgray;--btn-patinator-text-color: #555555;--btn-paginator-hover-color: #e9ecef;--btn-active-bg: #2a408e;--btn-active-border-color: #007bff;--btn-text-color: #f8f8f8;--btn-paginator-border-color: #f1f1f1;--btn-paginator-shadow: #4b92d2;--btn-share-hover-color: var(--link-color);--card-border-color: #f1f1f1;--card-box-shadow: rgba(234, 234, 234, 0.7686274509803922);--label-color: #808080;--relate-post-date: rgba(30, 55, 70, 0.4);--tag-bg: rgba(0, 0, 0, 0.075);--tag-border: #dee2e6;--tag-shadow: var(--btn-border-color);--tag-hover: rgb(222, 226, 230);--categories-hover-bg: var(--btn-border-color);--dash-color: silver;--timeline-color: rgba(0, 0, 0, 0.075);--timeline-node-bg: #c2c6cc;--timeline-year-dot-color: #ffffff;--footer-bg-color: #ffffff;--footnote-target-bg: lightcyan;--footer-link: #424242}html[mode=light] .mode-toggle{transform:none}}html,body{font-size:16px}body{line-height:1.75rem;background:var(--body-bg);color:var(--text-color);-webkit-font-smoothing:antialiased;font-family:'Source Sans Pro', 'Microsoft Yahei', sans-serif}#sidebar{padding-left:0;padding-right:0;position:fixed;top:0;left:0;height:100%;overflow-y:auto;width:260px;z-index:99;background:var(--sidebar-bg)}#sidebar a{color:rgba(255,255,255,0.5);transition:color 0.35s ease-in-out;user-select:none;margin:0 0.25rem}#sidebar .site-title{text-align:center}#sidebar .site-title a{font-weight:900;font-size:1.5rem;letter-spacing:0.5px}#sidebar .site-title a:hover{color:#fff;text-decoration:none}#sidebar .site-subtitle{font-size:95%;text-align:center;color:#828282;line-height:1.2rem;word-spacing:1px;margin:0.5rem 1.5rem 2rem 1.5rem}#sidebar .sidebar-bottom .icon-border+a{margin-left:0.1rem}#sidebar .nav-link{border-radius:0;font-size:0.95rem;font-weight:600;letter-spacing:1px}#sidebar .nav-item{height:3.3rem}#sidebar .nav-item:hover .nav-link{color:#f8f9facf}#sidebar .nav-item.active .nav-link{color:#fcfcfc}#sidebar ul{height:16.5rem;display:-webkit-box;display:-ms-flexbox}#sidebar ul>li:last-child>a{margin-right:-3px;max-width:calc(100% - 3px)}#sidebar ul>li:last-child::after{visibility:hidden;content:"";position:relative;right:1px;width:3px;height:1.6rem;background-color:var(--nav-cursor-color);pointer-events:none}#sidebar ul>li.active:nth-child(1)~li:last-child::after,#sidebar ul>li.nav-item:nth-child(1):hover~li:last-child::after{top:-12.4rem;visibility:visible}#sidebar ul>li.active:nth-child(2)~li:last-child::after,#sidebar ul>li.nav-item:nth-child(2):hover~li:last-child::after{top:-9.1rem;visibility:visible}#sidebar ul>li.active:nth-child(3)~li:last-child::after,#sidebar ul>li.nav-item:nth-child(3):hover~li:last-child::after{top:-5.8rem;visibility:visible}#sidebar ul>li.active:nth-child(4)~li:last-child::after,#sidebar ul>li.nav-item:nth-child(4):hover~li:last-child::after{top:-2.5rem;visibility:visible}#sidebar ul>li.active:nth-child(5):last-child::after,#sidebar ul>li.nav-item:nth-child(5):last-child:hover::after{top:.8rem;visibility:visible}#sidebar .sidebar-bottom{font-size:1.2rem;margin:2rem 2.5rem 1.6rem}#sidebar .sidebar-bottom a{margin-bottom:0.5rem}#sidebar .sidebar-bottom a:hover,#sidebar .sidebar-bottom #mode-toggle-wrapper>i:hover{color:#fff}#sidebar .sidebar-bottom #mode-toggle-wrapper i{color:rgba(255,255,255,0.5);transition:color 0.35s ease-in-out;user-select:none;margin:0 0.25rem;margin:0;font-size:1.05rem;text-align:center;position:relative;bottom:1px}#sidebar .sidebar-bottom .icon-border{background:#525354;width:3px;height:3px;border-radius:50%;margin-top:0.75rem}@media (hover: hover){#sidebar ul>li:last-child::after{-webkit-transition:top .5s ease;-moz-transition:top .5s ease;-o-transition:top .5s ease;transition:top .5s ease}}#nav-wrapper{width:100%;flex-grow:1}#profile-wrapper{margin-top:2rem}#avatar>a{display:block;width:6rem;height:6rem;border-radius:50%;border:2px solid #b6b6b6;overflow:hidden;transform:translateZ(0);-webkit-transition:border-color 0.35s ease-in-out;-moz-transition:border-color 0.35s ease-in-out;transition:border-color 0.35s ease-in-out}#avatar:hover>a{border-color:#fff}#avatar img{width:100%;height:100%;-webkit-transition:transform .5s;-moz-transition:transform .5s;transition:transform .5s}#avatar img:hover{-ms-transform:scale(1.2);-moz-transform:scale(1.2);-webkit-transform:scale(1.2);transform:scale(1.2)}#search-result-wrapper{display:none;position:fixed;top:0;padding-top:3rem;height:100%;overflow:auto}#search-result-wrapper .post-content{margin-top:2rem}#topbar-wrapper{height:3rem;position:fixed;top:0;left:260px;right:0;transition:top 0.2s ease-in-out;z-index:50;border-bottom:1px solid rgba(0,0,0,0.07);box-shadow:0 3px 5px 0 rgba(0,0,0,0.05);background-color:var(--topbar-wrapper-bg)}#topbar i{color:#999}#breadcrumb{font-size:1rem;color:gray;padding-left:0.5rem}#breadcrumb span:not(:last-child)::after{content:"›";padding:0 .3rem}#sidebar-trigger,#search-trigger{display:none}#search-wrapper{display:flex;width:95%;border-radius:1rem;border:1px solid var(--search-wrapper-bg);background:var(--search-wrapper-bg);padding:0 .5rem}#search-wrapper i{z-index:2;font-size:0.9rem;color:var(--search-icon-color)}#search-wrapper .fa-times-circle{visibility:hidden}#search-cancel{color:var(--link-color);margin-left:1rem;display:none}#search-input{background:center;border:0;border-radius:0;padding:0.18rem .3rem;color:var(--text-color)}#search-input:focus{box-shadow:none;background:center}#search-input.form-control:focus::-webkit-input-placeholder{opacity:0.6}#search-input.form-control:focus::-moz-placeholder{opacity:0.6}#search-input.form-control:focus:-ms-input-placeholder{opacity:0.6}#search-input.form-control:focus::placeholder{opacity:0.6}#search-hints{display:none}#search-hints .post-tag{display:inline-block;line-height:1rem;font-size:1rem;background:var(--search-tag-bg);border:none;padding:0.5rem;margin:0 1rem 1rem 0}#search-hints .post-tag::before{content:"#";color:var(--text-muted-color);padding-right:0.2rem}#search-results{padding-bottom:6rem}#search-results a{font-size:1.4rem;line-height:2.5rem}#search-results>div{max-width:100%}#search-results>div:not(:last-child){margin-bottom:1rem}#search-results>div i{color:#818182;margin-right:0.15rem;font-size:80%}#search-results>div>p{overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}#topbar-title{display:none;font-size:1.1rem;font-weight:600;font-family:sans-serif;color:var(--topbar-text-color);text-align:center;width:70%;overflow:hidden;text-overflow:ellipsis;word-break:keep-all;white-space:nowrap}#mask{display:none;position:fixed;top:0;right:0;bottom:0;left:0;height:100%;width:100%;z-index:1}[sidebar-display] #mask{display:block !important}#main-wrapper{background-color:var(--main-wrapper-bg);position:relative;min-height:100vh;padding-bottom:5rem;padding-left:0;padding-right:0}#main>div.row:first-child>div:nth-child(1),#main>div.row:first-child>div:nth-child(2){margin-top:3rem}#main>div.row:first-child>div:first-child{min-height:calc(100vh - 3rem - 5rem - 35rem)}#post-wrapper{min-height:calc(100vh - 3rem - 5rem - 35rem) !important}#topbar-wrapper.row,#main>.row,#search-result-wrapper>.row{margin-left:0;margin-right:0}footer{position:absolute;bottom:0;padding:0 1rem;height:5rem;font-size:0.8rem;color:#7a7b7d;background-color:var(--footer-bg-color)}footer>div.d-flex{line-height:1.2rem;width:95%;max-width:1045px;border-top:1px solid var(--main-border-color);margin-bottom:1rem}footer>div.d-flex>div{width:350px}footer a{color:var(--footer-link)}footer a:link{text-decoration:none}footer a:hover{text-decoration:none}footer .footer-right{text-align:right}.access{top:2rem;transition:top 0.2s ease-in-out;margin-right:1.5rem;margin-top:3rem;margin-bottom:4rem}.access:only-child{position:-webkit-sticky;position:sticky}.access.topbar-down{top:6rem}.access>div{padding-left:1rem;border-left:1px solid var(--main-border-color)}.access>div:not(:last-child){margin-bottom:4rem}.access span{color:var(--label-color);font-size:inherit;font-weight:600;font-family:'Roboto Condensed', 'Microsoft Yahei', sans-serif;display:block;line-height:1.2;padding-top:0.5rem;padding-bottom:0.5rem;margin-top:0;margin-bottom:0;letter-spacing:-0.02em}.access .post-content{font-size:0.9rem}#access-tags>div.post-content>div{max-width:80%}#access-tags .post-tag{display:inline-block;line-height:1rem;font-size:0.85rem;background:none;border:1px solid var(--btn-border-color);border-radius:0.8rem;padding:0.3rem .5rem;margin:0 .35rem .5rem 0}#access-tags .post-tag:hover{background-color:#2a408e;border-color:#2a408e;color:#fff;transition:none}#access-lastmod ul>li{height:1.8rem;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;list-style:none}#access-lastmod ul a{color:#6c757d}#back-to-top{display:none;z-index:1;cursor:pointer;position:fixed;background:var(--button-bg);color:var(--btn-backtotop-color);height:2.6em;width:2.7em;border-radius:50%;border:1px solid var(--btn-backtotop-border-color);transition:0.2s ease-out;-webkit-transition:0.2s ease-out}#back-to-top:hover{transform:translate3d(0, -5px, 0);-webkit-transform:translate3d(0, -5px, 0)}h1{font-size:1.8rem}h2{font-size:1.4rem}h3{font-size:1.25rem}h4{font-size:1.15rem}h5{font-size:1.1rem}blockquote{border-left:5px solid var(--blockquote-border-color);padding-left:1rem;color:var(--blockquote-text-color)}.post-content blockquote a{color:var(--link-color)}kbd{margin:0 .3rem}sup{z-index:1}sup:target{z-index:0}.footnotes ol{margin-top:0.5rem}.footnotes ol>li{padding-top:0.2rem;margin-top:-0.2rem}.footnotes ol>li>p{padding-left:0.2em}.footnotes ol>li:not(:last-child){margin-bottom:-.8rem}.footnotes ol>li:target>p{background-color:var(--footnote-target-bg);width:fit-content;-webkit-transition:background-color 1.5s ease-in-out;transition:background-color 1.5s ease-in-out}a.footnote{margin:0 .2em;border-bottom-style:none !important;-webkit-transition:background-color 1.5s ease-in-out;transition:background-color 1.5s 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td.rouge-code,div.language-console.highlighter-rouge td.rouge-code,div.language-terminal.highlighter-rouge td.rouge-code,div>pre{padding:0.8rem 1rem}.highlighter-rouge{color:var(--highlighter-rouge-color);margin-bottom:1.2em}.highlight{overflow:auto}.highlight .lineno{margin:0.8rem 0;padding:0 0.5rem;min-width:2.2rem;text-align:right;color:var(--highlight-lineno-color);border-right:1px solid var(--highlight-lineno-border-color);-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none}.highlight pre{margin-bottom:0;font-size:.85rem;line-height:1.4rem;word-wrap:normal}.highlight table{padding:0;border:0}.highlight table td pre{overflow:visible;word-break:normal}.highlight td{padding:0;border:0}code{-webkit-hyphens:none;-ms-hyphens:none;-moz-hyphens:none;hyphens:none}code.highlighter-rouge{font-size:.85rem;padding:3px 5px;margin:0 0.15rem;border-radius:4px;background-color:var(--inline-code-bg)}a>code.highlighter-rouge{padding-bottom:0;color:inherit}a:hover>code.highlighter-rouge{border-bottom:none}blockquote code.highlighter-rouge{color:inherit}td.rouge-code{padding-left:1rem;padding-right:1rem}div[class^='highlighter-rouge'] pre.lineno,div.language-plaintext.highlighter-rouge pre.lineno,div.language-console.highlighter-rouge pre.lineno,div.language-terminal.highlighter-rouge pre.lineno{display:none}.post-content>ol,.post-content>ul,.post-content>dl{padding-left:2rem}.post-content>ol li+li,.post-content>ul li+li,.post-content>dl li+li{margin-top:0.3rem}.post-content li>ol,.post-content li>ul,.post-content li>dl{padding-left:2rem;margin-top:0.3rem}.post-content li>p{margin:1rem 0 0.8rem}.post-content .preview-img{margin-top:0;margin-bottom:2.5rem;position:relative;left:50%;-webkit-transform:translateX(-50%);-ms-transform:translateX(-50%);transform:translateX(-50%)}.post-tail-wrapper{margin-top:6rem;border-bottom:1px double var(--main-border-color);font-size:0.85rem}.post-tags{line-height:2rem}.post-navigation{padding-top:3rem;padding-bottom:4rem}.post-navigation .btn{width:50%;position:relative;border-color:var(--btn-border-color);color:var(--link-color)}.post-navigation .btn:hover{background:#2a408e;color:#fff;border-color:#2a408e}.post-navigation .btn.disabled{width:50%;position:relative;border-color:var(--btn-border-color);pointer-events:auto;cursor:not-allowed;background:none;color:gray}.post-navigation .btn.disabled:hover{border-color:none}.post-navigation .btn.btn-outline-primary.disabled:focus{box-shadow:none}.post-navigation p{font-size:1.1rem;line-height:1.5rem;margin-top:0.3rem;white-space:normal}.post-navigation a::before,.post-navigation span::before{color:var(--text-muted-color);font-size:0.65rem;text-transform:uppercase}.post-navigation a:first-child,.post-navigation span:first-child{border-top-right-radius:0;border-bottom-right-radius:0;left:0.5px}.post-navigation a:first-child::before,.post-navigation span:first-child::before{content:"Older"}.post-navigation a:last-child,.post-navigation span:last-child{border-top-left-radius:0;border-bottom-left-radius:0;right:0.5px}.post-navigation a:last-child::before,.post-navigation span:last-child::before{content:"Newer"}@keyframes fade-up{from{opacity:0;position:relative;top:2rem}to{opacity:1;position:relative;top:0}}#toc-wrapper{border-left:1px solid rgba(158,158,158,0.17);position:-webkit-sticky;position:sticky;top:4rem;transition:top 0.2s ease-in-out;animation:fade-up .8s}#toc-wrapper.topbar-down{top:6rem}#toc-wrapper>span{color:var(--label-color);font-size:inherit;font-weight:600;font-family:'Roboto Condensed', 'Microsoft Yahei', sans-serif;display:block;line-height:1.2;padding-top:0.5rem;padding-bottom:0.5rem;margin-top:0;margin-bottom:0;letter-spacing:-0.02em}#toc li>a{line-height:1rem;padding-top:0.5rem;padding-bottom:0.5rem}#related-posts>h3{color:var(--label-color);font-size:1.1rem;font-weight:600;font-family:'Roboto Condensed', 'Microsoft Yahei', sans-serif}#related-posts .card{border:1px solid var(--card-border-color);background-color:var(--card-bg);box-shadow:0 0 5px 0 var(--card-box-shadow);-webkit-transition:all .3s ease-in-out;-moz-transition:all .3s ease-in-out;transition:all .3s ease-in-out}#related-posts .card h3{color:var(--text-color)}#related-posts .card:hover{-webkit-transform:translate3d(0, -3px, 0);transform:translate3d(0, -3px, 0);box-shadow:0 20px 35px -4px rgba(0,0,0,0.15)}#related-posts .timeago{color:var(--relate-post-date)}#related-posts p{font-size:0.9rem;margin-bottom:0.5rem;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}#related-posts a:hover{text-decoration:none}#related-posts ul{list-style-type:none;padding-inline-start:1.5rem}#related-posts ul>li::before{background:#c2c9d4;width:5px;height:5px;border-radius:1px;display:block;content:"";position:relative;top:1rem;right:1rem}#post-extend-wrapper{min-height:2rem}#post-extend-wrapper #disqus_thread{margin-bottom:2rem}.post-tail-bottom a{color:inherit}.share-wrapper .share-icons>i:hover,.share-wrapper .share-icons a:hover>i{color:var(--btn-share-hover-color) !important}.share-wrapper{vertical-align:middle;user-select:none}.share-wrapper .share-icons{font-size:1.2rem}.share-wrapper .share-icons a:not(:last-child){margin-right:0.25rem}.share-wrapper .share-icons a:hover{text-decoration:none}.share-wrapper .share-icons>i{padding-top:0.35rem}.share-wrapper .share-icons 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