/* ============================================
   Docs as Code — 屏幕与打印样式
   严格对齐 docs-as-code skill 参考实现
   ============================================ */

:root {
    --primary: #0d47a1;
    --secondary: #1565c0;
    --accent: #42a5f5;
    --light: #e3f2fd;
    --text: #212121;
    --muted: #616161;
    --bg: #f0f2f5;
    --sidebar-w: 260px;
    --content-w: 210mm;
    --a4-h: 297mm;
    --cover-px: 25mm;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
    font-size: 11pt;
    line-height: 1.8;
    color: var(--text);
    background: var(--bg);
}

/* ---- 整体布局：左侧目录 + 右侧主内容 ---- */
.layout {
    display: flex;
    max-width: calc(var(--sidebar-w) + var(--content-w));
    margin: 0 auto;
    background: #fff;
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    width: var(--sidebar-w);
    height: 100vh;
    overflow-y: auto;
    flex-shrink: 0;
    background: #fafbfc;
    border-right: 1px solid #e0e0e0;
    padding: 24px 18px;
}

.sidebar h2 {
    font-size: 13pt;
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 8px;
    margin-bottom: 14px;
    font-weight: 700;
}

.sidebar ul { list-style: none; padding: 0; }

.sidebar li {
    padding: 4px 0;
    font-size: 9.5pt;
    line-height: 1.5;
}

.sidebar li a {
    color: #555;
    text-decoration: none;
    display: block;
    border-radius: 4px;
    padding: 3px 8px;
    transition: all 0.15s;
}

.sidebar li a:hover {
    color: var(--primary);
    background: var(--light);
}

.sidebar .toc-level-2 { padding-left: 12px; }
.sidebar .toc-level-3 { padding-left: 24px; }
.sidebar .toc-level-4 { padding-left: 36px; }

.main {
    flex: 1;
    max-width: var(--content-w);
    min-width: 0;
    background: #fff;
}

/* ---- 封面（A4） ---- */
.cover {
    width: 100%;
    height: var(--a4-h);
    min-height: var(--a4-h);
    padding: 35mm var(--cover-px) 50mm;
    background: #fff;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    text-align: center;
    page-break-after: always;
    border-bottom: 1px solid #e0e0e0;
}

.cover-logo {
    max-width: 320px;
    max-height: 90px;
    height: auto;
    width: auto;
    margin: 0;
    object-fit: contain;
}

.cover-doc-type {
    font-size: 13pt;
    font-weight: 500;
    color: var(--secondary);
    letter-spacing: 0.5em;
    text-indent: 0.5em;
    margin-top: 15mm;
    margin-bottom: 15mm;
}

.cover-title {
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
    font-size: 26pt;
    font-weight: 700;
    color: #fff;
    background: var(--primary);
    line-height: 1.4;
    margin: 0 calc(-1 * var(--cover-px)) 0;
    padding: 0.4em var(--cover-px);
    width: calc(100% + 2 * var(--cover-px));
}

.cover-subtitle {
    font-size: 16pt;
    font-weight: 700;
    color: var(--secondary);
    margin-top: 8mm;
    margin-bottom: 18mm;
}

.cover-meta {
    width: 100%;
    max-width: 130mm;
    margin-top: auto;
    padding-bottom: 0;
}

.cover-meta table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11pt;
    color: var(--muted);
}

.cover-meta td {
    padding: 2.5mm 4mm;
    border-bottom: 1px solid #e0e0e0;
    vertical-align: middle;
    width: 50%;
}

.cover-meta td:first-child {
    text-align: center;
    color: #9e9e9e;
    font-weight: 500;
}

.cover-meta td:last-child {
    text-align: center;
    color: var(--text);
    font-weight: 500;
}

/* ---- 正文 ---- */
.content {
    padding: 2cm 2.5cm 3cm;
    background: #fff;
}

/* ---- 正文排版 ---- */
h1 {
    font-family: "Noto Serif SC", "SimSun", serif;
    font-size: 18pt;
    font-weight: 700;
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 0.3em;
    margin-top: 1.8em;
    line-height: 1.4;
}

h2 {
    font-family: "Noto Serif SC", "SimSun", serif;
    font-size: 14pt;
    font-weight: 600;
    color: var(--secondary);
    border-bottom: 1px solid var(--light);
    padding-bottom: 0.2em;
    margin-top: 1.5em;
}

h3 {
    font-size: 12pt;
    font-weight: 600;
    color: #303f9f;
    margin-top: 1.3em;
}

h4 { font-size: 11pt; font-weight: 600; }

p { margin: 0.6em 0; }

strong { color: var(--primary); }

ul, ol { padding-left: 2em; margin: 0.6em 0; }
li { margin: 0.25em 0; }

/* ---- 表格 ---- */
table {
    font-size: 10pt;
    border-collapse: collapse;
    width: 100%;
    margin: 1em 0;
}

th {
    background: var(--primary);
    color: #fff;
    font-weight: 500;
    text-align: center;
    padding: 8px 12px;
}

td {
    padding: 6px 12px;
    border: 1px solid #e0e0e0;
    text-align: left;
}

tbody tr:nth-child(even) { background: #f8f9fa; }

/* ---- 代码 ---- */
pre {
    background: #f5f5f5;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    padding: 12px 16px;
    overflow-x: auto;
    margin: 1em 0;
}

code {
    font-family: "JetBrains Mono", "Cascadia Code", "Consolas", monospace;
    font-size: 0.9em;
    background: #f0f0f0;
    padding: 1px 4px;
    border-radius: 3px;
}

pre code { background: none; padding: 0; }

/* ---- 图片（无阴影） ---- */
img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1em auto;
    border-radius: 4px;
}

/* ---- KaTeX 公式 ---- */
.katex-display {
    margin: 0.75em 0;
    overflow-x: auto;
    overflow-y: hidden;
}

/* ---- 响应式 ---- */
@media screen and (max-width: 1100px) {
    :root { --cover-px: 15mm; }
    .layout { flex-direction: column; }
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
    }
    .main { max-width: none; }
    .content { padding: 1.5cm; }
    .cover {
        width: calc(100% - 2rem);
        height: auto;
        min-height: auto;
        padding: 15mm;
        margin: 1rem auto;
    }
    .cover-title { font-size: 22pt; }
    .cover-subtitle { font-size: 14pt; }
}

/* ---- 打印 ---- */
@media print {
    body { background: #fff; }
    .layout { display: block; max-width: none; }
    .sidebar { display: none; }
    .main { max-width: none; }
    .cover {
        margin: 0;
        width: 100%;
        height: 100vh;
        min-height: 100vh;
        page-break-after: always;
    }
    .content {
        max-width: none;
        padding: 0;
    }
}
