/* 字体定义 - 使用国内CDN */
@font-face {
    font-family: 'JetBrains Mono';
    src: url('https://cdn.bootcdn.net/ajax/libs/JetBrainsMono/2.3.0/web/woff2/JetBrainsMono-Regular.woff2') format('woff2');
    font-display: swap;
}

/* 针对书籍正文区域的段落 */
.page-inner p {
    text-align: left !important;
}

:root {
    /* 定义字体变量 */
    --base-font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    --code-font: "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;
}

/* 全局字体重置 */
html, body {
    font-family: var(--base-font) !important;
}

/* 确保 .book 类也使用正确的字体 */
.book,
.book-summary,
.book-body,
.book-header {
    font-family: var(--base-font) !important;
}

/* markdown 内容区域字体设置 */
.markdown-section {
    font-family: var(--base-font) !important;
    font-size: 16px;
    line-height: 1.8;
}

/* 段落字体设置 */
.markdown-section p,
.markdown-section ul,
.markdown-section ol,
.markdown-section blockquote {
    font-family: var(--base-font) !important;
}

/* 标题字体设置 */
.markdown-section h1,
.markdown-section h2,
.markdown-section h3,
.markdown-section h4,
.markdown-section h5,
.markdown-section h6 {
    font-family: var(--base-font) !important;
    font-weight: 600;
}

/* 代码字体设置 */
.markdown-section pre,
.markdown-section code {
    font-family: var(--code-font) !important;
    font-size: 14px;
}

/* 侧边栏字体设置 */
.book-summary ul.summary li a,
.book-summary ul.summary li span {
    font-family: var(--base-font) !important;
    font-size: 14px;
    padding: 8px 15px;
}

/* 全局字体设置 */
body {
    font-family: var(--base-font);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* 内容区域优化 */
.markdown-section {
    max-width: 850px;
    margin: 0 auto;
    padding: 20px;
}

/* 段落优化 */
.markdown-section p {
    margin: 1.2em 0;
    text-align: justify;
    letter-spacing: 0.02em;
    word-break: break-word;
    overflow-wrap: break-word;
}

/* 标题优化 */
.markdown-section h1 { font-size: 2em; }
.markdown-section h2 { font-size: 1.6em; padding-bottom: 0.3em; }
.markdown-section h3 { font-size: 1.3em; }
.markdown-section h4 { font-size: 1.15em; }

/* 代码块优化 */
.markdown-section pre {
    padding: 1em;
    border-radius: 6px;
    overflow-x: auto;
    line-height: 1.5;
    position: relative;
}

.markdown-section code {
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

/* 侧边栏优化 */
.book-summary {
    border-right: 1px solid;
}

/* 列表优化 */
.markdown-section ul,
.markdown-section ol {
    padding-left: 2em;
    margin: 1em 0;
}

.markdown-section ul li,
.markdown-section ol li {
    margin-bottom: 0.5em;
}

/* 响应式优化 */
@media screen and (max-width: 768px) {
    .markdown-section {
        padding: 15px;
        font-size: 15px;
    }
    .book-summary ul.summary li a {
        padding: 10px 15px;
    }
    .markdown-section pre {
        font-size: 13px;
    }
}

/* 打印优化 */
@media print {
    .markdown-section {
        font-size: 12pt;
    }
    .markdown-section pre,
    .markdown-section code {
        font-size: 10pt;
    }
}