{{$email := index .ThemesExt "contact_email"}}
{{$repo := index .ThemesExt "repo_url"}}
{{$authorName := index .ThemesExt "author_name"}}
{{$authorTitle := index .ThemesExt "author_title"}}
{{$showBreadcrumb := index .ThemesExt "show_breadcrumb"}}
<div class="topbar"><div class="container"><div>{{if $authorName}}{{$authorName}}{{end}}{{if $authorTitle}} · {{$authorTitle}}{{end}}</div><div style="display:flex;gap:16px;flex-wrap:wrap;">{{if $email}}<a href="mailto:{{$email}}">{{$email}}</a>{{end}}{{if $repo}}<a href="{{$repo}}" target="_blank" rel="noopener">GitHub</a>{{end}}</div></div></div>
<header class="main-header"><div class="container nav-wrap"><a href="/" class="brand"><span class="brand-mark">{ }</span><div class="brand-text"><strong>{{if .Site}}{{if .Site.Title}}{{.Site.Title}}{{else}}Tech Notes{{end}}{{else}}Tech Notes{{end}}</strong><span>{{if $authorTitle}}{{$authorTitle}}{{else}}Engineering Notes{{end}}</span></div></a><nav class="main-nav"><a href="/" class="{{if eq .Type "home"}}is-active{{end}}">首页</a>{{range .Columns}}<a href="{{.URL}}" class="{{if .IsSelect}}is-active{{end}}">{{.Name}}</a>{{end}}</nav><div class="nav-actions"><a href="/about" class="ghost-btn">关于</a><a href="/message" class="primary-btn">留言</a><button id="mobile-nav-btn" class="mobile-toggle" aria-label="菜单">☰</button></div></div><div id="mobile-nav" class="container mobile-nav"><a href="/">首页</a>{{range .Columns}}<a href="{{.URL}}">{{.Name}}</a>{{end}}</div></header>
{{if and $showBreadcrumb (or (ne .Type "home") .Nav)}}<div class="container breadcrumb"><a href="/">首页</a>{{if .Nav}}{{range .Nav}}<span>/</span><a href="{{.URL}}">{{.Name}}</a>{{end}}{{else if .CurrentColumn}}<span>/</span><span>{{.CurrentColumn.Name}}</span>{{else if .Title}}<span>/</span><span>{{.Title}}</span>{{end}}</div>{{end}}