*{-webkit-font-smoothing:antialiased;-webkit-overflow-scrolling:touch;-webkit-tap-highlight-color:rgba(0,0,0,0);-webkit-text-size-adjust:none;-webkit-touch-callout:none;box-sizing:border-box}body:not(.ready){overflow:hidden}body:not(.ready) .app-nav,body:not(.ready)>nav,body:not(.ready) [data-cloak]{display:none}div#app{font-size:30px;font-weight:lighter;margin:40vh auto;text-align:center}div#app:empty:before{content:"Loading..."}img.emoji{height:1.2em}img.emoji,span.emoji{vertical-align:middle}span.emoji{font-family:Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;font-size:1.2em}.progress{background-color:#42b983;background-color:var(--theme-color,#42b983);height:2px;left:0;position:fixed;right:0;top:0;transition:width .2s,opacity .4s;width:0;z-index:999999}.search .search-keyword,.search a:hover{color:#42b983;color:var(--theme-color,#42b983)}.search .search-keyword{font-style:normal;font-weight:700}body,html{height:100%}body{-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased;color:#34495e;font-family:Source Sans Pro,Helvetica Neue,Arial,sans-serif;font-size:15px;letter-spacing:0;margin:0;overflow-x:hidden}img{max-width:100%}a[disabled]{cursor:not-allowed;opacity:.6}kbd{border:1px solid #ccc;border-radius:3px;display:inline-block;font-size:12px!important;line-height:12px;margin-bottom:3px;padding:3px 5px;vertical-align:middle}li input[type=checkbox]{margin:0 .2em .25em 0;vertical-align:middle}.app-nav{margin:25px 60px 0 0;position:absolute;right:0;text-align:right;z-index:10}.app-nav.no-badge{margin-right:25px}.app-nav p{margin:0}.app-nav>a{margin:0 1rem;padding:5px 0}.app-nav li,.app-nav ul{display:inline-block;list-style:none;margin:0}.app-nav a{color:inherit;font-size:16px;text-decoration:none;transition:color .3s}.app-nav a.active,.app-nav a:hover{color:#42b983;color:var(--theme-color,#42b983)}.app-nav a.active{border-bottom:2px solid #42b983;border-bottom:2px solid var(--theme-color,#42b983)}.app-nav li{display:inline-block;margin:0 1rem;padding:5px 0;position:relative;cursor:pointer}.app-nav li ul{background-color:#fff;border:1px solid;border-color:#ddd #ddd #ccc;border-radius:4px;box-sizing:border-box;display:none;max-height:calc(100vh - 61px);overflow-y:auto;padding:10px 0;position:absolute;right:-15px;text-align:left;top:100%;white-space:nowrap}.app-nav li ul li{display:block;font-size:14px;line-height:1rem;margin:8px 14px;white-space:nowrap}.app-nav li ul a{display:block;font-size:inherit;margin:0;padding:0}.app-nav li ul a.active{border-bottom:0}.app-nav li:hover ul{display:block}.github-corner{border-bottom:0;position:fixed;right:0;text-decoration:none;top:0;z-index:1}.github-corner:hover .octo-arm{animation:octocat-wave .56s ease-in-out}.github-corner svg{color:#fff;fill:#42b983;fill:var(--theme-color,#42b983);height:80px;width:80px}main{display:block;position:relative;width:100vw;height:100%;z-index:0}main.hidden{display:none}.anchor{display:inline-block;text-decoration:none;transition:all .3s}.anchor span{color:#34495e}.anchor:hover{text-decoration:underline}.sidebar{border-right:1px solid rgba(0,0,0,.07);overflow-y:auto;padding:40px 0 0;position:absolute;top:0;bottom:0;left:0;transition:transform .25s ease-out;width:300px;z-index:20}.sidebar>h1{margin:0 auto 1rem;font-size:1.5rem;font-weight:300;text-align:center}.sidebar>h1 a{color:inherit;text-decoration:none}.sidebar>h1 .app-nav{display:block;position:static}.sidebar .sidebar-nav{line-height:2em;padding-bottom:40px}.sidebar li.collapse .app-sub-sidebar{display:none}.sidebar ul{margin:0 0 0 15px;padding:0}.sidebar li>p{font-weight:700;margin:0}.sidebar ul,.sidebar ul li{list-style:none}.sidebar ul li a{border-bottom:none;display:block}.sidebar ul li ul{padding-left:20px}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:transparent;border-radius:4px}.sidebar:hover::-webkit-scrollbar-thumb{background:hsla(0,0%,53.3%,.4)}.sidebar:hover::-webkit-scrollbar-track{background:hsla(0,0%,53.3%,.1)}.sidebar-toggle{background-color:transparent;background-color:hsla(0,0%,100%,.8);border:0;outline:none;padding:10px;position:absolute;bottom:0;left:0;text-align:center;transition:opacity .3s;width:284px;z-index:30;cursor:pointer}.sidebar-toggle:hover .sidebar-toggle-button{opacity:.4}.sidebar-toggle span{background-color:#42b983;background-color:var(--theme-color,#42b983);display:block;margin-bottom:4px;width:16px;height:2px}body.sticky .sidebar,body.sticky .sidebar-toggle{position:fixed}.content{padding-top:60px;position:absolute;top:0;right:0;bottom:0;left:300px;transition:left .25s ease}.markdown-section{margin:0 auto;max-width:80%;padding:30px 15px 40px;position:relative}.markdown-section>*{box-sizing:border-box;font-size:inherit}.markdown-section>:first-child{margin-top:0!important}.markdown-section hr{border:none;border-bottom:1px solid #eee;margin:2em 0}.markdown-section iframe{border:1px solid #eee;width:1px;min-width:100%}.markdown-section table{border-collapse:collapse;border-spacing:0;display:block;margin-bottom:1rem;overflow:auto;width:100%}.markdown-section th{font-weight:700}.markdown-section td,.markdown-section th{border:1px solid #ddd;padding:6px 13px}.markdown-section tr{border-top:1px solid #ccc}.markdown-section p.tip,.markdown-section tr:nth-child(2n){background-color:#f8f8f8}.markdown-section p.tip{border-bottom-right-radius:2px;border-left:4px solid #f66;border-top-right-radius:2px;margin:2em 0;padding:12px 24px 12px 30px;position:relative}.markdown-section p.tip:before{background-color:#f66;border-radius:100%;color:#fff;content:"!";font-family:Dosis,Source Sans Pro,Helvetica Neue,Arial,sans-serif;font-size:14px;font-weight:700;left:-12px;line-height:20px;position:absolute;height:20px;width:20px;text-align:center;top:14px}.markdown-section p.tip code{background-color:#efefef}.markdown-section p.tip em{color:#34495e}.markdown-section p.warn{background:rgba(66,185,131,.1);border-radius:2px;padding:1rem}.markdown-section ul.task-list>li{list-style-type:none}body.close .sidebar{transform:translateX(-300px)}body.close .sidebar-toggle{width:auto}body.close .content{left:0}@media print{.app-nav,.github-corner,.sidebar,.sidebar-toggle{display:none}}@media screen and (max-width:768px){.github-corner,.sidebar,.sidebar-toggle{position:fixed}.app-nav{margin-top:16px}.app-nav li ul{top:30px}main{height:auto;min-height:100vh;overflow-x:hidden}.sidebar{left:-300px;transition:transform .25s ease-out}.content{left:0;max-width:100vw;position:static;padding-top:20px;transition:transform .25s ease}.app-nav,.github-corner{transition:transform .25s ease-out}.sidebar-toggle{background-color:transparent;width:auto;padding:30px 30px 10px 10px}body.close .sidebar{transform:translateX(300px)}body.close .sidebar-toggle{background-color:hsla(0,0%,100%,.8);transition:background-color 1s;width:284px;padding:10px}body.close .content{transform:translateX(300px)}body.close .app-nav,body.close .github-corner{display:none}.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave .56s ease-in-out}}@keyframes octocat-wave{0%,to{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}section.cover{position:relative;align-items:center;background-position:50%;background-repeat:no-repeat;background-size:cover;min-height:100vh;width:100%;display:none}section.cover.show{display:flex}section.cover.has-mask .mask{background-color:#fff;opacity:.8;position:absolute;top:0;bottom:0;width:100%}section.cover .cover-main{flex:1;margin:0 16px;text-align:center;position:relative}section.cover a{color:inherit}section.cover a,section.cover a:hover{text-decoration:none}section.cover p{line-height:1.5rem;margin:1em 0}section.cover h1{color:inherit;font-size:2.5rem;font-weight:300;margin:.625rem 0 2.5rem;position:relative;text-align:center}section.cover h1 a{display:block}section.cover h1 small{bottom:-.4375rem;font-size:1rem;position:absolute}section.cover blockquote{font-size:1.5rem;text-align:center}section.cover ul{line-height:1.8;list-style-type:none;margin:1em auto;max-width:500px;padding:0}section.cover .cover-main>p:last-child a{border-radius:2rem;border:1px solid #42b983;border-color:var(--theme-color,#42b983);box-sizing:border-box;color:#42b983;color:var(--theme-color,#42b983);display:inline-block;font-size:1.05rem;letter-spacing:.1rem;margin:.5rem 1rem;padding:.75em 2rem;text-decoration:none;transition:all .15s ease}section.cover .cover-main>p:last-child a:last-child{background-color:#42b983;background-color:var(--theme-color,#42b983);color:#fff}section.cover .cover-main>p:last-child a:last-child:hover{color:inherit;opacity:.8}section.cover .cover-main>p:last-child a:hover{color:inherit}section.cover blockquote>p>a{border-bottom:2px solid #42b983;border-bottom:2px solid var(--theme-color,#42b983);transition:color .3s}section.cover blockquote>p>a:hover{color:#42b983;color:var(--theme-color,#42b983)}.sidebar,body{background-color:#fff}.sidebar{color:#364149}.sidebar li{margin:6px 0}.sidebar ul li a{color:#505d6b;font-size:14px;font-weight:400;overflow:hidden;text-decoration:none;text-overflow:ellipsis;white-space:nowrap}.sidebar ul li a:hover{text-decoration:underline}.sidebar ul li ul{padding:0}.sidebar ul li.active>a{border-right:2px solid;color:#42b983;color:var(--theme-color,#42b983);font-weight:600}.app-sub-sidebar li:before{content:"-";padding-right:4px;float:left}.markdown-section h1,.markdown-section h2,.markdown-section h3,.markdown-section h4,.markdown-section strong{color:#2c3e50;font-weight:600}.markdown-section a{color:#42b983;color:var(--theme-color,#42b983);font-weight:600}.markdown-section h1{font-size:2rem;margin:0 0 1rem}.markdown-section h2{font-size:1.75rem;margin:45px 0 .8rem}.markdown-section h3{font-size:1.5rem;margin:40px 0 .6rem}.markdown-section h4{font-size:1.25rem}.markdown-section h5{font-size:1rem}.markdown-section h6{color:#777;font-size:1rem}.markdown-section figure,.markdown-section p{margin:1.2em 0}.markdown-section ol,.markdown-section p,.markdown-section ul{line-height:1.6rem;word-spacing:.05rem}.markdown-section ol,.markdown-section ul{padding-left:1.5rem}.markdown-section blockquote{border-left:4px solid #42b983;border-left:4px solid var(--theme-color,#42b983);color:#858585;margin:2em 0;padding-left:20px}.markdown-section blockquote p{font-weight:600;margin-left:0}.markdown-section iframe{margin:1em 0}.markdown-section em{color:#7f8c8d}.markdown-section code,.markdown-section output:after,.markdown-section pre{font-family:Roboto Mono,Monaco,courier,monospace}.markdown-section code,.markdown-section pre{background-color:#f8f8f8}.markdown-section output,.markdown-section pre{margin:1.2em 0;position:relative}.markdown-section output,.markdown-section pre>code{border-radius:2px;display:block}.markdown-section output:after,.markdown-section pre>code{-moz-osx-font-smoothing:initial;-webkit-font-smoothing:initial}.markdown-section code{border-radius:2px;color:#e96900;margin:0 2px;padding:3px 5px;white-space:pre-wrap}.markdown-section>:not(h1):not(h2):not(h3):not(h4):not(h5):not(h6) code{font-size:.8rem}.markdown-section pre{padding:0 1.4rem;line-height:1.5rem;overflow:auto;word-wrap:normal}.markdown-section pre>code{color:#525252;font-size:.8rem;padding:2.2em 5px;line-height:inherit;margin:0 2px;max-width:inherit;overflow:inherit;white-space:inherit}.markdown-section output{padding:1.7rem 1.4rem;border:1px dotted #ccc}.markdown-section output>:first-child{margin-top:0}.markdown-section output>:last-child{margin-bottom:0}.markdown-section code:after,.markdown-section code:before,.markdown-section output:after,.markdown-section output:before{letter-spacing:.05rem}.markdown-section output:after,.markdown-section pre:after{color:#ccc;font-size:.6rem;font-weight:600;height:15px;line-height:15px;padding:5px 10px 0;position:absolute;right:0;text-align:right;top:0;content:attr(data-lang)}.token.cdata,.token.comment,.token.doctype,.token.prolog{color:#8e908c}.token.namespace{opacity:.7}.token.boolean,.token.number{color:#c76b29}.token.punctuation{color:#525252}.token.property{color:#c08b30}.token.tag{color:#2973b7}.token.string{color:#42b983;color:var(--theme-color,#42b983)}.token.selector{color:#6679cc}.token.attr-name{color:#2973b7}.language-css .token.string,.style .token.string,.token.entity,.token.url{color:#22a2c9}.token.attr-value,.token.control,.token.directive,.token.unit{color:#42b983;color:var(--theme-color,#42b983)}.token.function,.token.keyword{color:#e96900}.token.atrule,.token.regex,.token.statement{color:#22a2c9}.token.placeholder,.token.variable{color:#3d8fd1}.token.deleted{text-decoration:line-through}.token.inserted{border-bottom:1px dotted #202746;text-decoration:none}.token.italic{font-style:italic}.token.bold,.token.important{font-weight:700}.token.important{color:#c94922}.token.entity{cursor:help}code .token{-moz-osx-font-smoothing:initial;-webkit-font-smoothing:initial;min-height:1.5rem;position:relative;left:auto}
:root {
  --theme-color: #2a7a5a; --theme-soft: #e7f1eb; --bg: #f3f2ee; --surface: #fafbf8; --stripe: #f6f6f1;
  --text: #2f3e46; --heading: #1f2d33; --muted: #647068; --border: #dfe3da; --code-bg: #fafbf8; --inline-code: #9a3f2a; --inline-code-bg: #ebe9e2;
  --mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

body, .sidebar, .sidebar-toggle { background: var(--bg); }
body { color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
.app-name { font-weight: 650 !important; letter-spacing: .02em; }
.sidebar { padding-top: 24px; border-right: 1px solid var(--border); }
.sidebar .search { border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.search input { background: var(--input-bg) !important; border-radius: 6px; }
.sidebar-nav > ul { padding-left: 12px; margin: 0 12px 0 0; }
.sidebar-nav > ul > li { margin: 2px 0; }
.sidebar-nav > ul > li + li > strong { display: block; margin-top: 14px; }
.sidebar ul li strong { display: block; padding: 4px 10px; font-size: 12px; font-weight: 600; letter-spacing: .08em; color: var(--muted); }
.sidebar ul li ul { margin: 0; padding-left: 0; }
.sidebar ul li ul li { margin: 1px 0; }
.sidebar ul li a { display: block; padding: 4px 10px; border-radius: 6px; color: var(--side-link); font-size: 14px; line-height: 1.6; transition: background-color .15s, color .15s; }
.sidebar ul li a:hover { background: var(--hover); color: var(--heading); }
.sidebar ul li.active > a { border-right: 0; background: var(--theme-soft); color: var(--theme-color); }
.markdown-section h2 { padding-bottom: .45rem; border-bottom: 1px solid var(--border); }
.markdown-section img { max-width: 100%; height: auto; border-radius: 4px; }
.markdown-section pre { background: var(--surface); border-radius: 6px; border: 1px solid var(--border); }
.markdown-section table { display: block; overflow: auto; }
.docsify-copy-code-button { font-family: inherit !important; }
.search .matching-post { border-color: var(--border); }
.site-footer { border-top: 1px solid var(--border); margin-top: 64px; padding-top: 20px; color: var(--muted); font-size: 12px; text-align: center; }
.site-footer a { display: inline-block; padding: 5px 2px; color: inherit; font-weight: 400; }
.site-footer a:hover { color: var(--theme-color); }
/* Docsify 挂载前 #app 中只有一行载入提示，挂载后 #app 被替换 */
div#app { margin: 0; }
/* 载入完成前 body 不能滚动，出现滚动条时页面会左移；预留滚动条的位置 */
html { scrollbar-gutter: stable; }
#app { display: flex; align-items: center; justify-content: center; min-height: 100vh; color: var(--muted); font-size: 14px; letter-spacing: .04em; }
.learn-banner, .learn-callout { display: flex; align-items: center; gap: 16px; margin: 18px 0; padding: 16px 18px; border: 1px solid var(--border); border-left: 4px solid var(--theme-color); border-radius: 10px; background: var(--surface); color: inherit; text-decoration: none !important; }
.learn-banner:hover, .learn-banner:focus-visible, .learn-callout:hover, .learn-callout:focus-visible { border-color: var(--theme-color); background: var(--theme-soft); }
.learn-banner-text { flex: 1; min-width: 0; }
.learn-banner b, .learn-callout b { display: block; color: var(--theme-color); font-size: 16px; }
.learn-banner-text span, .learn-callout span { display: block; margin-top: 2px; font-size: 14px; line-height: 1.6; color: var(--text); }
.learn-banner-go { flex: none; padding: 7px 18px; border-radius: 8px; background: var(--theme-color); color: #fff; font-weight: 600; font-size: 15px; }
[data-theme="dark"] .learn-banner-go { color: #0f2219; }
.learn-callout { display: block; }
.learn-practice { margin-top: 36px; }
.learn-q { display: flex; align-items: center; gap: 8px; margin: -6px 0 16px; padding: 7px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: inherit; font-size: 14px; line-height: 1.5; text-decoration: none !important; }
.learn-q:hover, .learn-q:focus-visible { border-color: var(--theme-color); background: var(--theme-soft); }
.markdown-section a.learn-q { color: inherit; }
.learn-q-label { flex: none; padding: 1px 7px; border-radius: 5px; background: var(--theme-soft); color: var(--theme-color); font-size: 12px; font-weight: 600; }
.learn-q-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; opacity: .9; }
.learn-q-go { flex: none; color: var(--theme-color); font-weight: 600; }
.learn-daily { margin: -8px 0 18px; }
.learn-daily .learn-q-text { display: -webkit-box; white-space: normal; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.learn-q.due .learn-q-go { color: #c2410c; }
[data-theme="dark"] .learn-q.due .learn-q-go { color: #fb923c; }
.topic-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin: 18px 0; }
.topic-grid a { display: flex; align-items: center; justify-content: center; gap: 7px; padding: 13px 8px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); text-decoration: none; font-size: 14px; white-space: nowrap; }
.topic-grid a:hover, .topic-grid a:focus-visible { background: #e8f1e9; border-color: var(--theme-color); }
.site-search { padding: 8px 15px; }
.site-search input { box-sizing: border-box; width: 100%; min-height: 42px; padding: 10px 12px; border: 1px solid var(--border); color: var(--heading); font-size: 15px; }
.site-search input:focus { outline: 2px solid var(--theme-color); outline-offset: 1px; }
.search-status { color: var(--muted); font-size: 12px; margin: 7px 0; }
.search-status:empty { display: none; }
.site-search .matching-post { display: block; padding: 12px 0; border-bottom: 1px solid var(--border); text-decoration: none; }
.matching-post strong, .matching-post small { display: block; }
.matching-post strong { color: var(--theme-color); font-size: 14px; }
.matching-post small { color: var(--muted); margin: 5px 0; font-size: 12px; }
.site-search .matching-post[aria-current] { margin: 0 -8px; padding-left: 8px; padding-right: 8px; border-radius: 6px; background: var(--theme-soft); }
.site-search .matching-post:hover { background: var(--hover); margin: 0 -8px; padding-left: 8px; padding-right: 8px; border-radius: 6px; }
.matching-post p { color: var(--text); margin: 4px 0; font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
.article-toc > ul { margin-bottom: 0; }
@media (min-width: 769px) { .content { padding-top: 12px; } .article-toc { display: none; } }
.page-toc-block { margin: 0 0 18px; padding: 0 0 14px 18px; border-bottom: 1px solid var(--border); }
.page-toc-title { margin: 0 0 6px; font-size: 14px; font-weight: 600; color: var(--text); }
.sidebar ul li.active-parent > a { color: var(--theme-color); font-weight: 600; }
.page-toc-block.page-toc-child { margin: 2px 0 8px 14px; padding: 0 0 0 6px; border: 0; border-left: 1px solid var(--border); }
.page-toc-child .page-toc-title { margin: 0; padding: 4px 8px; border-radius: 6px; background: var(--theme-soft); color: var(--theme-color); font-size: 13px; line-height: 1.55; }
.page-toc-child > ul.page-toc { margin: 2px 0 0; padding-left: 0; border: 0; }
.markdown-section .article-meta .meta-category { text-decoration: none; padding: 0 8px; border-radius: 10px; background: var(--theme-soft); color: var(--theme-color); }
.sidebar ul.page-toc { margin: 4px 0 8px 14px; padding-left: 6px; border-left: 1px solid var(--border); }
.sidebar ul.page-toc li { margin: 0; }
.sidebar ul.page-toc li a { padding: 3px 8px; font-size: 13px; line-height: 1.55; color: var(--muted); border: none; font-weight: normal; }
.sidebar ul.page-toc li a:hover { color: var(--heading); }
.sidebar ul.page-toc ul { margin: 0 0 2px 12px; }
.sidebar ul.page-toc li.has-sub > ul { display: none; }
.sidebar ul.page-toc li.has-sub.open > ul { display: block; }
.sidebar ul.page-toc li.current > a { color: var(--theme-color); font-weight: 600; background: none; }
@media (max-width: 768px) {
  .markdown-section { padding: 24px 22px 80px; }
  .markdown-section h1 { font-size: 1.65rem; }
  .markdown-section pre { padding: 14px; }
  .topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .topic-grid a { min-height: 44px; padding: 8px; }
  .site-logo { width: 110px; }
  .sidebar-toggle { width: 48px; height: 48px; padding: 13px; background: var(--bg); }
  .sidebar ul li a { padding-top: 7px; padding-bottom: 7px; }
  .markdown-section summary { min-height: 44px; }
}

/* 高频小节：目录、侧边栏和正文标题后的小火焰 */
.hot { display: inline-flex; gap: 1px; margin-left: 5px; line-height: 1; vertical-align: -1px; }
.hot svg { display: block; width: 11px; height: 14px; }
.hot .o { fill: #d2665c; }
.hot .i { fill: #f6d7d2; }
.markdown-section h2 .hot, .markdown-section h3 .hot, .markdown-section h4 .hot { margin-left: 8px; vertical-align: 1px; }
.markdown-section h2 .hot svg, .markdown-section h3 .hot svg { width: 15px; height: 19px; }
.markdown-section h4 .hot svg { width: 13px; height: 16px; }

/* 步骤动图的播放器 */
.anim-bar { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 6px 0 4px; }
.anim-bar button { min-height: 30px; padding: 2px 12px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); font: inherit; font-size: 13px; cursor: pointer; }
.anim-bar button:hover, .anim-bar button:focus-visible { border-color: var(--theme-color); color: var(--theme-color); }
.anim-count { min-width: 44px; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }

/* 搜索词高亮 */
.matching-post mark { background: var(--mark); color: inherit; border-radius: 2px; padding: 0 1px; }

/* 阅读进度、回到顶部和深色模式按钮 */
.read-progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; background: var(--theme-color); transform: scaleX(0); transform-origin: 0 50%; z-index: 30; pointer-events: none; }
.reading-tools { position: fixed; right: 20px; bottom: 24px; display: flex; flex-direction: column; gap: 10px; z-index: 30; }
.reading-tools button { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; padding: 0; border: 1px solid var(--border); border-radius: 50%; background: var(--surface); color: var(--muted); cursor: pointer; }
.reading-tools button[hidden] { display: none; }
.reading-tools button:hover, .reading-tools button:focus-visible { border-color: var(--theme-color); color: var(--theme-color); }
.reading-tools svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle svg path:only-child { fill: currentColor; stroke: none; }

/* 文章信息、上一篇和下一篇、继续阅读 */
.markdown-section .article-meta { display: flex; flex-wrap: wrap; gap: 4px 18px; margin: -1.2rem 0 1.6rem; color: var(--muted); font-size: 13px; line-height: 1.6; }
.markdown-section > .article-meta:first-child { margin-top: 0; }
.markdown-section .article-meta a { color: inherit; font-weight: 400; text-decoration: underline; text-decoration-color: var(--border); text-underline-offset: 3px; }
.markdown-section .article-meta a:hover { color: var(--theme-color); }
.page-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 56px; }
.markdown-section .page-nav a { display: block; padding: 12px 16px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); color: var(--text); font-weight: 500; text-decoration: none; }
.markdown-section .page-nav a:hover, .markdown-section .page-nav a:focus-visible { border-color: var(--theme-color); }
.page-nav a.next { text-align: right; grid-column: 2; }
.page-nav small { display: block; margin-bottom: 2px; color: var(--muted); font-size: 12px; font-weight: 400; }
.page-nav span { overflow-wrap: anywhere; }
.page-nav + .site-footer { margin-top: 32px; }
.markdown-section .recent-read { margin: -4px 0 18px; color: var(--muted); font-size: 14px; }
.resume-toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%); display: flex; align-items: center; gap: 6px; max-width: calc(100vw - 120px); padding: 8px 8px 8px 16px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); font-size: 14px; box-shadow: 0 2px 10px rgba(0, 0, 0, .06); z-index: 30; }
.resume-toast b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.resume-toast span { flex: none; color: var(--muted); }
.resume-toast button { flex: none; min-height: 30px; border: 0; border-radius: 6px; background: none; font: inherit; cursor: pointer; }
.resume-toast .go { padding: 0 12px; background: var(--theme-color); color: var(--on-theme); }
.resume-toast .close { width: 30px; color: var(--muted); font-size: 18px; }
@media (max-width: 768px) {
  .reading-tools { right: 14px; bottom: 18px; }
  .page-nav { grid-template-columns: 1fr; }
  .page-nav a.next { grid-column: 1; }
  .resume-toast { left: 58px; right: 64px; bottom: 18px; transform: none; max-width: none; padding-left: 10px; }
  .resume-toast span { display: none; }
}

/* 正文排版：两种配色共用，颜色都取自变量 */
::selection { background: rgba(42, 122, 90, .2); }
:focus-visible { outline: 2px solid var(--theme-color); outline-offset: 2px; border-radius: 3px; }
.markdown-section { max-width: 880px; padding: 40px 44px 100px; font-size: var(--read-size); color: var(--text); }
.markdown-section p, .markdown-section ul, .markdown-section ol { line-height: var(--read-leading); }
.markdown-section li + li { margin-top: .2em; }
.markdown-section h1, .markdown-section h2, .markdown-section h3, .markdown-section h4, .markdown-section h5,
.markdown-section strong { color: var(--heading); }
.markdown-section h1, .markdown-section h2, .markdown-section h3, .markdown-section h4 { scroll-margin-top: 20px; text-wrap: balance; }
.markdown-section p, .markdown-section li { text-wrap: pretty; }
.markdown-section h1 { font-size: 2rem; line-height: 1.3; margin: .6rem 0 1.6rem; letter-spacing: .01em; }
.markdown-section h2 { font-size: 1.55rem; line-height: 1.4; margin: 3rem 0 1.1rem; }
.markdown-section h3 { font-size: 1.25rem; line-height: 1.45; margin: 2.2rem 0 .8rem; }
.markdown-section h4 { font-size: 1.08rem; line-height: 1.5; margin: 1.8rem 0 .6rem; }
.markdown-section h5 { font-size: 1rem; margin: 1.5rem 0 .5rem; }
.markdown-section h1 + .article-meta + h2, .markdown-section h1 + .article-meta + details + h2 { margin-top: 1.6rem; }
.markdown-section a { color: var(--theme-color); font-weight: 500; text-decoration: none; }
.markdown-section p a, .markdown-section li a, .markdown-section td a { text-decoration: underline; text-decoration-color: var(--link-line); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.markdown-section p a:hover, .markdown-section li a:hover, .markdown-section td a:hover { text-decoration-color: currentColor; }
.markdown-section .anchor, .markdown-section h1 a, .markdown-section h2 a, .markdown-section h3 a, .markdown-section h4 a, .markdown-section h5 a { text-decoration: none; }
.markdown-section .anchor span { color: var(--heading); }
.markdown-section .anchor:hover span { color: var(--heading); }
.markdown-section em { color: inherit; }
.markdown-section hr { border-bottom-color: var(--border); margin: 2.4em 0; }
.markdown-section blockquote { margin: 1.4em 0; padding: 10px 16px; border-left: 3px solid var(--theme-color); border-radius: 0 6px 6px 0; background: var(--surface); color: var(--quote); }
.markdown-section blockquote p { margin: .3em 0; }
/* vue.css 用 :not(h1)…:not(h6) code 把代码设成 .8rem，这里重复类名提高优先级 */
.markdown-section.markdown-section code { font-family: var(--mono); font-size: .86em; color: var(--inline-code); background: var(--inline-code-bg); border-radius: 4px; padding: .12em .38em; margin: 0 .1em; }
.markdown-section pre { background: var(--code-bg); border-color: var(--border); padding: 0 1.1em; margin: 1.2em 0; }
.markdown-section.markdown-section pre > code { font-family: var(--mono); font-size: calc(var(--read-size) * .84); line-height: 1.65; color: var(--code-text); background: none; padding: 1.4em 0; margin: 0; }
.markdown-section pre::after { color: var(--muted); font-family: var(--mono); font-weight: 500; font-size: 11px; letter-spacing: .04em; }
.markdown-section table {
  background: linear-gradient(to right, var(--bg) 30%, transparent) left / 24px 100% no-repeat local,
    linear-gradient(to left, var(--bg) 30%, transparent) right / 24px 100% no-repeat local,
    radial-gradient(farthest-side at 0 50%, var(--scroll-shade), transparent) left / 10px 100% no-repeat scroll,
    radial-gradient(farthest-side at 100% 50%, var(--scroll-shade), transparent) right / 10px 100% no-repeat scroll;
}
.markdown-section table { font-size: calc(var(--read-size) * .9); line-height: 1.65; border-collapse: collapse; margin: 1.2em 0; }
.markdown-section th { background: var(--surface); font-weight: 600; color: var(--heading); }
.markdown-section td, .markdown-section th { padding: 7px 12px; border-color: var(--border); }
.markdown-section tr { border-top-color: var(--border); }
.markdown-section tr:nth-child(2n) { background: var(--stripe); }
.markdown-section .article-toc ul { line-height: 1.75; }
.docsify-copy-code-button, .docsify-copy-code-button span { color: var(--on-theme) !important; }
.docsify-copy-code-button { border-radius: 0 6px 0 6px !important; font-size: 12px !important; padding: 4px 10px !important; }
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: var(--tk-comment); }
.token.punctuation { color: var(--tk-punct); }
.token.keyword, .token.function { color: var(--tk-keyword); }
.token.number, .token.boolean { color: var(--tk-number); }
.token.string, .token.attr-value, .token.control, .token.directive, .token.unit { color: var(--tk-string); }
.token.tag, .token.attr-name, .token.variable, .token.placeholder { color: var(--tk-tag); }
.token.selector { color: var(--tk-selector); }
.token.property { color: var(--tk-property); }
.token.atrule, .token.regex, .token.statement, .token.url, .token.entity { color: var(--tk-atrule); }
.token.important { color: var(--tk-keyword); }
/* 折叠块：学习路线的参考要点、文章目录 */
.markdown-section details { margin: 1em 0; padding: 0 16px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); }
.markdown-section summary { display: flex; align-items: center; gap: 8px; min-height: 40px; color: var(--theme-color); font-weight: 500; cursor: pointer; list-style: none; user-select: none; }
.markdown-section summary::-webkit-details-marker { display: none; }
.markdown-section summary::before { content: ""; flex: none; width: 6px; height: 6px; margin: 0 3px 0 1px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(-45deg); transition: transform .15s; }
.markdown-section details[open] > summary::before { transform: rotate(45deg) translate(-1px, -1px); }
.markdown-section details[open] > summary { margin-bottom: 4px; border-bottom: 1px solid var(--border); }
.markdown-section details > :last-child { margin-bottom: 12px; }
.markdown-section .article-toc { padding: 0 16px; margin: 20px 0 28px; }
/* 标题的复制链接按钮：悬停或聚焦时出现 */
.markdown-section .heading-link { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; margin-left: 6px; padding: 0; border: 0; border-radius: 5px; background: none; color: var(--muted); font: 500 15px/1 var(--mono); vertical-align: middle; cursor: pointer; opacity: 0; transition: opacity .15s; }
.markdown-section :hover > .heading-link, .markdown-section .heading-link:focus-visible { opacity: 1; }
.markdown-section .heading-link:hover { color: var(--theme-color); background: var(--hover); }
@media (hover: none) { .markdown-section .heading-link { display: none; } .docsify-copy-code-button { opacity: 1 !important; } }
/* 代码块右上角：语言标签和复制按钮在同一位置，按钮出现时隐藏标签；text 标签不提供信息，不显示 */
.markdown-section pre[data-lang="text"]::after, .markdown-section pre:hover::after, .markdown-section pre:focus-within::after { content: none; }
.markdown-section pre:focus-within .docsify-copy-code-button { opacity: 1; }
@media (hover: none) { .markdown-section pre::after { content: none; } }
/* 跳到正文：只在键盘聚焦时出现 */
.skip-link { position: fixed; left: 12px; top: -48px; z-index: 50; padding: 8px 14px; border: 0; border-radius: 6px; background: var(--theme-color); color: var(--on-theme); font: inherit; font-size: 14px; cursor: pointer; }
.skip-link:focus { top: 12px; }
.markdown-section:focus { outline: none; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }
.copy-notice { position: fixed; left: 50%; top: 18px; transform: translateX(-50%); padding: 6px 14px; border-radius: 6px; background: var(--heading); color: var(--bg); font-size: 13px; z-index: 40; pointer-events: none; }
:root {
  --scroll-shade: rgba(31, 45, 51, .12); --input-bg: #fff; --mark: #e6e3fa; --on-theme: #fff; --side-link: #48544e; --hover: rgba(31, 45, 51, .05);
  --link-line: rgba(42, 122, 90, .35); --quote: #4f5b55; --code-text: #34404a;
  --tk-comment: #6b7570; --tk-punct: #58635d; --tk-keyword: #a3501b; --tk-number: #9b5a14; --tk-string: #2a7a52;
  --tk-tag: #2d6b9a; --tk-selector: #5a52a3; --tk-property: #7f6212; --tk-atrule: #17788a;
}

/* 深色模式：跟随系统，也可以用右下角的按钮切换；只换变量，个别组件单独调整 */
[data-theme="dark"] {
  color-scheme: dark;
  --theme-color: #5cbf92; --theme-soft: #24342c; --bg: #1a1d1c; --surface: #212624; --stripe: #1f2422;
  --text: #c9d1cc; --heading: #e6ebe7; --muted: #8f9a93; --border: #313835; --code-bg: #1f2422; --inline-code: #e8a87c; --inline-code-bg: #2a302d;
  --scroll-shade: rgba(0, 0, 0, .45); --input-bg: #212624; --mark: #3c3860; --on-theme: #0f2219; --side-link: #b1bbb5; --hover: rgba(255, 255, 255, .05);
  --link-line: rgba(92, 191, 146, .4); --quote: #aab3ad; --code-text: #d0d7d2;
  --tk-comment: #84908a; --tk-punct: #a3aca7; --tk-keyword: #e8a87c; --tk-number: #dba67f; --tk-string: #8fcf9f;
  --tk-tag: #86b7da; --tk-selector: #aaa4e0; --tk-property: #d8b673; --tk-atrule: #74c4d2;
}
[data-theme="dark"] ::selection { background: rgba(92, 191, 146, .3); }
[data-theme="dark"] .sidebar { color: var(--text); border-right-color: var(--border); }
[data-theme="dark"] .app-name-link { color: var(--heading); }
[data-theme="dark"] .github-corner svg { fill: #2d3532; color: var(--bg); }
/* 配图大多是浅色底，压暗一些并垫上浅底，避免刺眼和透明背景看不清 */
[data-theme="dark"] .markdown-section img { filter: brightness(.9); background: #ecebe6; }
[data-theme="dark"] .markdown-section a img, [data-theme="dark"] .markdown-section img.site-logo { background: none; filter: none; }
[data-theme="dark"] .medium-zoom-overlay { background: var(--bg) !important; }
[data-theme="dark"] .medium-zoom-image--opened { filter: none; }
[data-theme="dark"] .resume-toast { box-shadow: 0 2px 12px rgba(0, 0, 0, .35); }
[data-theme="dark"] .hot .i { fill: #f2cdc7; }

/* 打印：只保留正文 */
@media print {
  .sidebar, .sidebar-toggle, .github-corner, .reading-tools, .read-progress, .resume-toast, .page-nav, .anim-bar, .docsify-copy-code-button, .site-footer { display: none !important; }
  .content { position: static; left: 0 !important; padding: 0; }
  .markdown-section { max-width: none; padding: 0; }
  .markdown-section pre, .markdown-section img { break-inside: avoid; }
  .article-toc { display: none; }
}

/* 阅读设置：右下角 Aa 按钮调字号和行距，记在本地；代码和表格随正文字号等比缩放 */
:root { --read-size: 16px; --read-leading: 1.85; }
[data-size="0"] { --read-size: 15px; }
[data-size="2"] { --read-size: 17px; }
[data-size="3"] { --read-size: 18px; }
[data-size="4"] { --read-size: 19.5px; }
[data-leading="compact"] { --read-leading: 1.7; }
[data-leading="loose"] { --read-leading: 2.05; }
.reading-panel { position: fixed; right: 72px; bottom: 24px; width: 236px; padding: 14px 16px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); font-size: 14px; box-shadow: 0 6px 24px rgba(0, 0, 0, .08); z-index: 31; }
.reading-panel[hidden] { display: none; }
.reading-panel .row { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.reading-panel .row > span { color: var(--muted); font-size: 13px; }
.reading-panel .seg { display: flex; border: 1px solid var(--border); border-radius: 7px; overflow: hidden; }
.reading-panel .seg button { min-width: 44px; min-height: 34px; padding: 0 9px; border: 0; background: none; color: var(--text); font: inherit; font-size: 13px; cursor: pointer; }
.reading-panel .seg button + button, .reading-panel .seg output { border-left: 1px solid var(--border); }
.reading-panel .seg output { display: flex; align-items: center; justify-content: center; min-width: 46px; font-variant-numeric: tabular-nums; font-size: 13px; }
.reading-panel .seg output + button { border-left: 1px solid var(--border); }
.reading-panel .seg button[aria-pressed="true"] { background: var(--theme-soft); color: var(--theme-color); font-weight: 600; }
.reading-panel .seg button:disabled { color: var(--border); cursor: default; }
.reading-panel .reset { display: block; margin: 0 0 0 auto; padding: 4px 2px; border: 0; background: none; color: var(--muted); font: inherit; font-size: 12px; cursor: pointer; }
.reading-panel .reset[hidden] { display: none; }
.reading-panel .reset:hover { color: var(--theme-color); }
.reading-panel .seg button:focus-visible { outline-offset: -2px; border-radius: 6px; }
.reading-tools .reading-toggle { font: 600 15px/1 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; letter-spacing: -.02em; }
.reading-tools .reading-toggle[aria-expanded="true"] { border-color: var(--theme-color); color: var(--theme-color); }
[data-theme="dark"] .reading-panel { box-shadow: 0 6px 24px rgba(0, 0, 0, .4); }
@media (max-width: 768px) {
  .reading-panel { right: 66px; left: 62px; bottom: 18px; width: auto; max-width: 300px; margin-left: auto; padding: 14px 14px 10px; }
  .reading-panel .seg button { min-height: 40px; }
}
@media print { .reading-panel { display: none !important; } }

/* 切换深浅色：支持视图过渡的浏览器从按钮处圆形展开新配色，其它浏览器直接切换 */
::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-new(root) { z-index: 1; }

/* 首页贡献者头像：链接按图片大小计算点击区域 */
.markdown-section > a:has(> img) { display: inline-block; margin: 2px; }
.markdown-section > a > img[src*="avatars"] { aspect-ratio: 1; }

/* 搜索：快捷键提示、键盘选中的结果、正文中标出的搜索词、跳转到的小节标题短暂高亮 */
.site-search { position: relative; }
.site-search .search-key { position: absolute; right: 24px; top: 19px; padding: 1px 6px; border: 1px solid var(--border); border-radius: 4px; background: var(--surface); color: var(--muted); font: 11px/1.6 var(--mono); pointer-events: none; }
.site-search input:focus ~ .search-key, .site-search input:not(:placeholder-shown) ~ .search-key { display: none; }
@media (hover: none) { .site-search .search-key { display: none; } }
.site-search .matching-post[aria-selected="true"] { margin: 0 -8px; padding-left: 8px; padding-right: 8px; border-radius: 6px; background: var(--surface); box-shadow: inset 2px 0 0 var(--theme-color); }
.matching-post strong mark { color: var(--heading); }
.markdown-section mark.search-hit { background: var(--mark); color: inherit; border-radius: 2px; padding: 0 1px; }
@keyframes jump-flash { from { background: var(--theme-soft); } to { background: transparent; } }
.markdown-section .jump-target { animation: jump-flash 1.8s ease-out; border-radius: 4px; }

/* 离线提示 */
.markdown-section .offline-note { margin: 0 0 18px; padding: 8px 12px; border-radius: 6px; background: var(--theme-soft); color: var(--text); font-size: 14px; }

/* 打印：去掉学习站的入口和题目提示，代码自动换行不被截断，标题不落在页尾 */
@media print {
  body, .markdown-section pre, .markdown-section code { background: #fff !important; }
  .learn-q, .learn-callout, .learn-banner, .offline-note { display: none !important; }
  .markdown-section pre, .markdown-section pre > code { white-space: pre-wrap !important; overflow-wrap: anywhere; }
  .markdown-section h1, .markdown-section h2, .markdown-section h3, .markdown-section h4 { break-after: avoid; }
  .markdown-section table { display: table; }
  .markdown-section tr { break-inside: avoid; }
}
.markdown-section pre > code[tabindex]:focus-visible, .markdown-section table[tabindex]:focus-visible { outline: 2px solid currentColor; outline-offset: -2px; }
.token.namespace { opacity: 1; color: var(--muted); }
.article-toc li a { display: inline-block; padding: 3px 0; }
.markdown-section :not(pre) > code { overflow-wrap: anywhere; }

/* sidebar-scrim：手机上打开目录时，底部按钮条用页面底色，正文盖一层淡的遮罩 */
@media (max-width: 768px) {
  body.close .sidebar-toggle { background-color: var(--bg); box-shadow: 0 -1px 0 var(--border); }
  .content::after { content: ""; position: fixed; inset: 0; z-index: 25; background: rgba(20, 24, 23, .32); opacity: 0; pointer-events: none; transition: opacity .25s ease; }
  body.close .content::after { opacity: 1; pointer-events: auto; }
}

/* 读完的文章：侧边栏标 ✓，首页写已读完几篇 */
.sidebar-nav a.read::after { content: "✓"; content: "✓" / ""; margin-left: 6px; color: var(--theme-color); font-size: 12px; font-weight: 600; }
.markdown-section .recent-read .read-count { margin-left: 12px; }
.markdown-section .recent-read .clear-read { margin-left: 8px; padding: 2px 4px; border: 0; background: none; color: var(--muted); font: inherit; font-size: 13px; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.markdown-section .recent-read .clear-read:hover { color: var(--theme-color); }