:root{--sidebar-width: 260px;--header-height: 52px;--color-bg: #ffffff;--color-sidebar-bg: #f8f9fa;--color-border: #e1e4e8;--color-text: #24292e;--color-text-muted: #586069;--color-link: #3f51b5;--color-link-hover: #1a237e;--color-code-bg: #f6f8fa;--color-code-border: #e1e4e8;--color-sidebar-active: #e8edff;--radius: 6px;--shadow: 0 1px 3px rgba(0,0,0,.08)}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.6;color:var(--color-text);background:var(--color-bg);height:100%}body{display:flex;flex-direction:column}.site-header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--color-bg);border-bottom:1px solid var(--color-border);display:flex;align-items:center;padding:0 1.5rem;z-index:100;gap:1rem}.site-header .site-title{font-size:1rem;font-weight:700;color:var(--color-text);text-decoration:none;display:flex;align-items:center;gap:.4rem}.site-header .site-title span{color:var(--color-link)}.site-header .site-meta{margin-left:auto;font-size:.8rem;color:var(--color-text-muted)}.site-header .site-meta a{color:var(--color-text-muted);text-decoration:none}.site-header .site-meta a:hover{color:var(--color-link)}.layout{display:flex;margin-top:var(--header-height);min-height:calc(100vh - 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