:root { --primary: #2563eb; --bg: #fff; --text: #1f2937; --sidebar-bg: #f8fafc; --border: #e5e7eb; --code-bg: #f3f4f6; }
* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif; line-height: 1.8; color: var(--text); margin: 0; display: flex; }
.sidebar { width: 280px; background: var(--sidebar-bg); border-right: 1px solid var(--border); position: fixed; height: 100vh; overflow-y: auto; padding: 20px; }
.sidebar h1 { font-size: 18px; margin: 0 0 15px 0; padding-bottom: 10px; border-bottom: 2px solid var(--primary); }
.sidebar h1 a { color: var(--primary); text-decoration: none; }
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar li { margin: 3px 0; }
.sidebar a { color: var(--text); text-decoration: none; display: block; padding: 5px 10px; border-radius: 4px; font-size: 13px; }
.sidebar a:hover, .sidebar a.active { background: var(--primary); color: white; }
.sidebar .part { font-weight: 600; margin-top: 12px; padding: 6px 10px; background: #e2e8f0; border-radius: 4px; font-size: 13px; }
.main { margin-left: 280px; flex: 1; max-width: 900px; padding: 30px 50px; }
h1 { font-size: 28px; border-bottom: 2px solid var(--border); padding-bottom: 10px; }
h2 { font-size: 22px; margin-top: 35px; border-bottom: 1px solid #eee; padding-bottom: 8px; }
h3 { font-size: 18px; margin-top: 25px; }
pre { background: var(--code-bg); padding: 16px; border-radius: 8px; overflow-x: auto; }
code { font-family: "SF Mono", Monaco, Consolas, monospace; font-size: 14px; }
pre code { background: none; padding: 0; }
p code, li code { background: var(--code-bg); padding: 2px 6px; border-radius: 4px; }

/* Mermaid 图表样式 */
.mermaid { background: #fff !important; border: 1px solid var(--border); margin: 20px 0; }
.mermaid svg { max-width: 100%; height: auto; display: block; margin: 0 auto; }

/* 隐藏 Mermaid 渲染前的代码 */
.mermaid:not([data-processed="true"]) { color: transparent; }

table { width: 100%; border-collapse: collapse; margin: 20px 0; }
th, td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
th { background: var(--sidebar-bg); font-weight: 600; }
tr:nth-child(even) { background: #fafafa; }
img { max-width: 100%; height: auto; display: block; }
figure { margin: 20px 0; text-align: center; }
figcaption { margin-top: 10px; font-size: 14px; color: #666; }
blockquote { border-left: 4px solid var(--primary); margin: 20px 0; padding: 10px 20px; background: var(--sidebar-bg); }
@media print { .sidebar { display: none; } .main { margin-left: 0; max-width: none; } }
@media (max-width: 900px) { .sidebar { width: 220px; } .main { margin-left: 220px; padding: 20px; } }