/* 寒语馨的博客 · 全站样式（构建时合并） */

/* ===== tokens.css ===== */
/* 设计变量：亮 / 暗两套主题 */

:root {
  --bg:            #fdfdfc;
  --bg-soft:       #f6f5f2;
  --bg-code:       #f4f2ed;
  --text:          #201e1a;
  --text-muted:    #7b756b;
  --text-faint:    #a9a39a;
  --border:        #e7e3db;
  --border-soft:   #f0ece4;
  --accent:        #b0553a;
  --accent-hover:  #93432c;
  --accent-soft:   rgba(176, 85, 58, .08);
  --shadow-sm:     0 1px 2px rgba(32, 30, 26, .04);
  --shadow-md:     0 2px 4px rgba(32, 30, 26, .04), 0 10px 28px rgba(32, 30, 26, .06);

  --hl-keyword:  #9b3d6b;
  --hl-string:   #5c7a3f;
  --hl-comment:  #a49c90;
  --hl-number:   #a8603a;
  --hl-func:     #3f6b8f;
  --hl-title:    #8a5a1f;
  --hl-attr:     #7a4a86;
  --hl-builtin:  #4a6f8a;
  --hl-literal:  #9b3d6b;
  --hl-type:     #8a5a1f;
  --hl-var:      #3f6b8f;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, "SimSun", Georgia, "Times New Roman", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono:  ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;

  --measure: 42rem;
  --header-h: 4rem;
  --radius: 10px;
}

[data-theme="dark"] {
  --bg:            #141310;
  --bg-soft:       #1c1a16;
  --bg-code:       #1e1c17;
  --text:          #ebe7e0;
  --text-muted:    #9d978c;
  --text-faint:    #6d6861;
  --border:        #2b2822;
  --border-soft:   #232019;
  --accent:        #d9895f;
  --accent-hover:  #e9a07a;
  --accent-soft:   rgba(217, 137, 95, .11);
  --shadow-sm:     0 1px 2px rgba(0, 0, 0, .35);
  --shadow-md:     0 2px 4px rgba(0, 0, 0, .3), 0 10px 28px rgba(0, 0, 0, .42);

  --hl-keyword:  #d98bb0;
  --hl-string:   #a8c67f;
  --hl-comment:  #6d6861;
  --hl-number:   #e0a179;
  --hl-func:     #8ab8d9;
  --hl-title:    #e2c07d;
  --hl-attr:     #c9a2d4;
  --hl-builtin:  #96c0d4;
  --hl-literal:  #d98bb0;
  --hl-type:     #e2c07d;
  --hl-var:      #8ab8d9;
}

/* ===== base.css ===== */
/* 基础：reset、页面骨架、通用容器 */

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

main { flex: 1 0 auto; }

::selection { background: var(--accent-soft); color: var(--text); }

a { color: inherit; text-decoration: none; }

.skip {
  position: absolute; left: -9999px;
  top: 0; padding: .6rem 1rem; background: var(--accent); color: #fff; z-index: 99;
}
.skip:focus { left: 0; }

.wrap {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.wrap-narrow { max-width: calc(var(--measure) + 3rem); }
.wrap-post   { max-width: calc(var(--measure) + 3rem); }

.empty { color: var(--text-muted); padding: 2rem 0; }
.dot   { color: var(--text-faint); }

.btn {
  display: inline-block; margin-top: 1rem; padding: .55rem 1.35rem;
  background: var(--accent); color: #fff; border-radius: 999px;
  font-size: .875rem; transition: background .18s ease;
}
.btn:hover { background: var(--accent-hover); }

/* ===== layout.css ===== */
/* 全局布局：顶栏 / 首屏 / 页脚 */

/* ---- 顶栏 ---- */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  max-width: 46rem;
}

.brand { display: inline-flex; align-items: center; gap: .6rem; }
.brand-mark {
  width: 1.9rem; height: 1.9rem; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: #fff;
  font-family: var(--serif); font-size: 1rem; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
  letter-spacing: 0;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 35%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, .28);
  transition: transform .25s ease, box-shadow .25s ease;
}
.brand:hover .brand-mark {
  transform: translateY(-1px) rotate(-4deg);
  box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 45%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, .28);
}
.brand-text {
  font-family: var(--serif); font-size: 1.1rem; font-weight: 600; letter-spacing: .06em;
}
.brand-tag {
  font-size: .66rem; font-weight: 500;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: .08rem .38rem;
  letter-spacing: .14em;
  margin-left: .1rem;
  transform: translateY(.5px);
}

.nav { display: flex; align-items: center; gap: .35rem; margin-left: .4rem; }
.nav a {
  position: relative;
  padding: .32rem .78rem;
  border-radius: 9px;
  font-size: .875rem; color: var(--text-muted);
  white-space: nowrap;
  transition: color .18s ease, background .18s ease;
}
.nav a:hover { color: var(--text); background: var(--bg-soft); }
.nav a.active { color: var(--accent); background: var(--accent-soft); font-weight: 500; }
.nav a.active:hover { background: var(--accent-soft); }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.05rem; height: 2.05rem; padding: 0; margin-left: .15rem;
  background: transparent; border: 1px solid transparent; border-radius: 50%;
  color: var(--text-muted); cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.theme-toggle:hover { color: var(--accent); background: var(--accent-soft); border-color: transparent; }
.theme-toggle svg {
  width: 1.08rem; height: 1.08rem; fill: none; stroke: currentColor; stroke-width: 1.7;
  transition: transform .4s ease;
}
.theme-toggle:hover svg { transform: rotate(40deg); }
.theme-toggle .i-moon { display: none; }
[data-theme="dark"] .theme-toggle .i-sun { display: none; }
[data-theme="dark"] .theme-toggle .i-moon { display: block; }

/* ---- 首屏 ---- */
.hero { padding: 4.2rem 0 3rem; }
.hero h1 {
  margin: 0 0 .85rem;
  font-family: var(--serif);
  font-size: 2.5rem; font-weight: 600; letter-spacing: .02em; line-height: 1.25;
}
.hero .tagline {
  margin: 0; color: var(--text-muted); font-size: 1rem; letter-spacing: .03em;
}
.hero-sub { padding: 3rem 0 2rem; }
.hero-sub h1 { font-size: 1.8rem; }

/* ---- 页脚 ---- */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 2rem 0 2.4rem;
  font-size: .8rem; color: var(--text-faint);
}
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .6rem; }
.site-footer p { margin: 0; }
.footer-links a { transition: color .18s ease; }
.footer-links a:hover { color: var(--accent); }

/* ===== components.css ===== */
/* 可复用组件：进度条 / 回到顶部 / 分页 / 标签 / 目录 / 上下篇 */

/* ---- 阅读进度 ---- */
.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 40;
  background: transparent; pointer-events: none;
}
.progress span {
  display: block; height: 100%; width: 0;
  background: var(--accent); transition: width .1s linear;
}

/* ---- 回到顶部 ---- */
.to-top {
  position: fixed; right: 1.5rem; bottom: 1.5rem; z-index: 25;
  width: 2.4rem; height: 2.4rem;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bg); border: 1px solid var(--border); border-radius: 50%;
  color: var(--text-muted); cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all .25s ease;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--accent); border-color: var(--accent); }
.to-top svg { width: 1rem; height: 1rem; fill: none; stroke: currentColor; stroke-width: 1.8; }

/* ---- 文章卡片列表（首页 / 标签页） ---- */
.post-list { list-style: none; margin: 0; padding: 0; }
.entry { border-top: 1px solid var(--border); }
.entry:last-child { border-bottom: 1px solid var(--border); }

.entry-link { display: block; padding: 1.6rem .35rem 1.7rem; transition: background .2s ease; }
.entry-link:hover { background: var(--bg-soft); }

.entry-date {
  display: block; margin-bottom: .5rem;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .08em;
  color: var(--text-faint);
}
.entry-title {
  margin: 0 0 .5rem;
  font-family: var(--serif); font-size: 1.32rem; font-weight: 600;
  letter-spacing: .01em; line-height: 1.45;
  transition: color .18s ease;
}
.entry-link:hover .entry-title { color: var(--accent); }
.entry-summary {
  margin: 0 0 .8rem; color: var(--text-muted); font-size: .925rem; line-height: 1.75;
}
.entry-foot {
  display: flex; align-items: center; gap: .55rem; flex-wrap: wrap;
  font-size: .74rem; color: var(--text-faint); letter-spacing: .04em;
}
.entry-time { font-family: var(--mono); }
.entry-tag::before { content: "#"; opacity: .7; }

/* ---- 分页 ---- */
.pager {
  display: flex; align-items: center; justify-content: space-between;
  padding: 2rem .35rem 4rem;
}
.pager-link { font-size: .875rem; color: var(--text-muted); transition: color .18s ease; }
.pager-link:hover { color: var(--accent); }
.pager-dir { font-family: var(--mono); }

/* ---- 标签 ---- */
.tags { display: inline-flex; flex-wrap: wrap; gap: .45rem; }
.tag {
  display: inline-block; padding: .16rem .55rem;
  background: var(--accent-soft); color: var(--accent);
  border-radius: 999px; font-size: .78rem; letter-spacing: .02em;
  transition: background .18s ease, color .18s ease;
}
.tag:hover { background: var(--accent); color: #fff; }

.tag-cloud { list-style: none; margin: 0 0 2rem; padding: 0; display: flex; flex-wrap: wrap; gap: .6rem; }
.tag-cloud a {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .38rem .85rem;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 999px; font-size: .875rem;
  transition: all .18s ease;
}
.tag-cloud a:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.tag-count { font-family: var(--mono); font-size: .72rem; color: var(--text-faint); }

/* ---- 文章目录（窄屏折叠版） ---- */
.toc-inline {
  margin: 0 0 2.4rem;
  padding: .2rem 1.15rem;
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  font-size: .875rem;
}
.toc-inline summary {
  cursor: pointer; padding: .75rem 0;
  font-size: .8rem; letter-spacing: .1em; color: var(--text-muted);
  list-style: none;
}
.toc-inline summary::-webkit-details-marker { display: none; }
.toc-inline summary::before { content: "▸ "; color: var(--accent); }
.toc-inline[open] summary::before { content: "▾ "; }
.toc-inline ol { margin: .1rem 0 .9rem; padding-left: 1.3rem; }
.toc-inline li { margin: .3rem 0; line-height: 1.6; }
.toc-inline a { color: var(--text-muted); transition: color .18s ease; }
.toc-inline a:hover { color: var(--accent); }
.toc-l3 { margin-left: .8rem !important; font-size: .84rem; }

/* ---- 文章目录（宽屏吸附侧栏） ---- */
.toc-rail { display: none; font-size: .82rem; }
.toc-rail-title {
  margin: 0 0 .75rem;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .18em;
  color: var(--text-faint); text-transform: uppercase;
}
.toc-rail ol { list-style: none; margin: 0; padding: 0; }
.toc-rail li { margin: 0; }
.toc-rail a {
  display: block; padding: .3rem 0 .3rem .85rem;
  color: var(--text-faint);
  border-left: 1px solid var(--border);
  line-height: 1.55;
  transition: color .15s ease, border-color .15s ease;
}
.toc-rail a:hover { color: var(--text); }
.toc-rail a.active { color: var(--accent); border-left-color: var(--accent); }
.toc-rail li.toc-l3 a { padding-left: 1.65rem; }

/* ---- 上下篇 ---- */
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  margin-top: 3.2rem; padding-top: 1.8rem;
  border-top: 1px solid var(--border);
}
.post-nav-item { display: flex; flex-direction: column; gap: .3rem; min-width: 0; }
.post-nav-next { text-align: right; }
.post-nav-label { font-family: var(--mono); font-size: .72rem; letter-spacing: .06em; color: var(--text-faint); }
.post-nav-title { font-family: var(--serif); font-size: .95rem; line-height: 1.5; transition: color .18s ease; }
.post-nav-item:hover .post-nav-title { color: var(--accent); }

/* ===== post.css ===== */
/* 文章页：标题区与正文排版 */

.post { padding: 3.4rem 0 3rem; }

.post-header { margin-bottom: 2.6rem; }
.post-meta {
  display: flex; align-items: center; gap: .5rem; flex-wrap: wrap;
  margin: 0 0 1rem;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .06em;
  color: var(--text-faint);
}
.post-title {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: 1.95rem; font-weight: 600; line-height: 1.4; letter-spacing: .01em;
}
.post-tags { margin: 0; }

.post-content { font-size: 1.02rem; line-height: 1.92; }
.post-content > *:first-child { margin-top: 0; }
.post-content > *:last-child { margin-bottom: 0; }

.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: var(--serif); font-weight: 600; line-height: 1.5;
  letter-spacing: .01em;
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}
.post-content h2 {
  margin: 3.2rem 0 1.15rem; padding-bottom: .55rem;
  font-size: 1.42rem; border-bottom: 1px solid var(--border-soft);
}
.post-content h3 { margin: 2.3rem 0 .85rem; font-size: 1.16rem; }
.post-content h4 { margin: 1.9rem 0 .7rem; font-size: 1.02rem; color: var(--text-muted); }

.post-content p { margin: 1.15rem 0; }
.post-content strong { font-weight: 650; }
.post-content em { font-style: italic; }

.post-content a {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  transition: border-color .18s ease, color .18s ease;
}
.post-content a:hover { color: var(--accent-hover); border-bottom-color: var(--accent-hover); }

.post-content ul,
.post-content ol { margin: 1.15rem 0; padding-left: 1.5rem; }
.post-content li { margin: .45rem 0; }
.post-content li::marker { color: var(--text-faint); }

.post-content blockquote {
  margin: 1.6rem 0; padding: .3rem 0 .3rem 1.15rem;
  border-left: 3px solid var(--accent);
  color: var(--text-muted);
}
.post-content blockquote p { margin: .6rem 0; }

.post-content hr { margin: 2.8rem 0; border: none; border-top: 1px solid var(--border); }

.post-content img {
  max-width: 100%; height: auto; display: block;
  margin: 1.8rem auto; border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.post-content :not(pre) > code {
  padding: .13em .42em; margin: 0 .1em;
  background: var(--bg-code); border: 1px solid var(--border-soft);
  border-radius: 5px;
  font-family: var(--mono); font-size: .855em;
  color: var(--accent);
  word-break: break-word;
}

.post-content table {
  width: 100%; margin: 1.8rem 0; border-collapse: collapse;
  font-size: .9rem; display: block; overflow-x: auto;
}
.post-content th,
.post-content td { padding: .6rem .85rem; border: 1px solid var(--border); text-align: left; }
.post-content th { background: var(--bg-soft); font-weight: 600; }

/* ===== code.css ===== */
/* 代码块：工具条 + 语法高亮配色 */

.code-block {
  margin: 1.7rem 0;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: .4rem .55rem .4rem .95rem;
  background: color-mix(in srgb, var(--bg-code) 55%, var(--bg));
  border-bottom: 1px solid var(--border);
}

.code-lang {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .08em;
  color: var(--text-faint); text-transform: lowercase;
}

.copy-btn {
  padding: .2rem .6rem;
  background: transparent; color: var(--text-faint);
  border: 1px solid transparent; border-radius: 6px;
  font-family: var(--sans); font-size: .7rem; letter-spacing: .04em;
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}
.copy-btn:hover { color: var(--accent); border-color: var(--border); background: var(--bg); }
.copy-btn.done { color: var(--accent); border-color: var(--accent); }

.code-block pre {
  margin: 0; padding: 1.05rem 1.2rem;
  overflow-x: auto;
  font-size: .855rem; line-height: 1.7;
}
.code-block code {
  display: block;
  font-family: var(--mono);
  background: none; border: none; padding: 0;
  color: var(--text); white-space: pre;
}

/* 语法高亮（highlight.js 类名） */
.hljs-comment, .hljs-quote { color: var(--hl-comment); font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-literal, .hljs-doctag { color: var(--hl-keyword); }
.hljs-string, .hljs-regexp, .hljs-addition, .hljs-meta .hljs-string { color: var(--hl-string); }
.hljs-number, .hljs-symbol, .hljs-bullet { color: var(--hl-number); }
.hljs-title, .hljs-section, .hljs-name { color: var(--hl-title); }
.hljs-function .hljs-title, .hljs-title.function_ { color: var(--hl-func); }
.hljs-attr, .hljs-attribute, .hljs-selector-attr { color: var(--hl-attr); }
.hljs-built_in, .hljs-class .hljs-title { color: var(--hl-builtin); }
.hljs-type, .hljs-params { color: var(--hl-type); }
.hljs-variable, .hljs-template-variable { color: var(--hl-var); }
.hljs-meta, .hljs-punctuation { color: var(--text-muted); }
.hljs-deletion { color: var(--hl-keyword); }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: 700; }

/* ===== pages.css ===== */
/* 独立页面：页头 / 归档 / 404 */

.page-header { padding: 3.4rem 0 2.2rem; }
.page-header h1 {
  margin: 0 0 .55rem;
  font-family: var(--serif); font-size: 1.95rem; font-weight: 600; letter-spacing: .02em;
}
.page-desc { margin: 0; color: var(--text-muted); font-size: .9rem; }
.page-desc a { color: var(--accent); }

/* ---- 归档 ---- */
.archive-year { margin-bottom: 2.4rem; }
.archive-year-title {
  display: flex; align-items: baseline; gap: .55rem;
  margin: 0 0 .9rem; padding-bottom: .5rem;
  font-family: var(--serif); font-size: 1.1rem; font-weight: 600;
  border-bottom: 1px solid var(--border-soft);
}
.archive-count { font-family: var(--mono); font-size: .74rem; color: var(--text-faint); }
.archive-list { list-style: none; margin: 0; padding: 0; }
.archive-list li { display: flex; gap: 1rem; padding: .42rem 0; align-items: baseline; }
.archive-list time {
  flex: none; width: 3.1rem;
  font-family: var(--mono); font-size: .78rem; color: var(--text-faint);
}
.archive-list a { transition: color .18s ease; }
.archive-list a:hover { color: var(--accent); }

/* ---- 404 ---- */
.notfound { padding: 6rem 0; text-align: center; }
.notfound-code {
  margin: 0; font-family: var(--serif); font-size: 4.5rem; line-height: 1;
  color: var(--border); letter-spacing: .05em;
}
.notfound h1 { margin: 1rem 0 .6rem; font-family: var(--serif); font-size: 1.5rem; font-weight: 600; }

/* ===== docs.css ===== */
/* 文档站布局：顶栏增强 / 侧栏 / 面包屑 / 知识库首页 / 搜索弹窗 / 移动端抽屉 */

/* ---- 顶栏增强（文档形态：更宽、带搜索） ---- */
.site-header .header-inner {
  max-width: 80rem;
  padding: 0 1.5rem;
  gap: 1.4rem;
}
.header-left { display: flex; align-items: center; gap: 1rem; min-width: 0; }
.header-right { display: flex; align-items: center; gap: .35rem; }

.menu-toggle {
  display: none;
  width: 2.05rem; height: 2.05rem; padding: 0;
  background: transparent; border: none; border-radius: 9px;
  color: var(--text-muted); cursor: pointer;
}
.menu-toggle:hover { color: var(--text); background: var(--bg-soft); }
.menu-toggle svg { width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.7; }

.search-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  width: 11.5rem;
  height: 2.25rem; padding: 0 .6rem 0 .75rem;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text-faint); cursor: pointer;
  font-size: .84rem;
  transition: border-color .18s ease, color .18s ease, background .18s ease,
    box-shadow .18s ease, transform .18s ease;
}
.search-btn:hover {
  color: var(--text); border-color: var(--border);
  background: var(--bg);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.search-btn svg { width: .95rem; height: .95rem; fill: none; stroke: currentColor; stroke-width: 1.8; flex: none; }
.search-btn kbd {
  margin-left: auto;
  font-family: var(--mono); font-size: .68rem; color: var(--text-faint);
  border: 1px solid var(--border); border-radius: 5px; padding: .12rem .32rem;
  background: var(--bg);
  box-shadow: 0 1.5px 0 var(--border);
}

/* ---- 文档骨架：侧栏 + 正文 ---- */
.docs-shell {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: 1.8rem .8rem 2rem 0;
  border-right: 1px solid var(--border-soft);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.side-home { margin-top: 0; }
.side-title {
  margin: 1.4rem 0 .45rem;
  font-size: .78rem; font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .04em;
}
.side-home a { color: var(--text); }
.side-home a:hover { color: var(--accent); }
.side-list { margin: 0; padding: 0; list-style: none; }
.side-list li { margin: 0; }
.side-list a {
  display: block;
  padding: .3rem .6rem;
  margin-left: -.6rem;
  border-radius: 7px;
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.55;
  transition: color .15s ease, background .15s ease;
}
.side-list a:hover { color: var(--text); background: var(--bg-soft); }
.side-list a.active {
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 500;
}

.docs-main { min-width: 0; }

.sidebar-mask {
  display: none;
  position: fixed; inset: 0; z-index: 39;
  background: rgba(0, 0, 0, .45);
}

/* ---- 面包屑 ---- */
.wrap { max-width: 46rem; }
.crumbs {
  max-width: 80rem;
  padding: 1.35rem 1.5rem .2rem;
  margin: 0 auto;
  font-size: .8rem;
  color: var(--text-faint);
}
.crumbs a { color: var(--text-muted); }
.crumbs a:hover { color: var(--accent); }
.crumb-sep { margin: 0 .4rem; color: var(--border); }
.crumb-here { color: var(--text); }

/* ---- 知识库首页 ---- */
.wrap-docs-home { max-width: 62rem; }
.hero-docs { padding: 4.5rem 0 3rem; text-align: left; }
.hero-docs h1 { font-size: 2.7rem; margin-bottom: .9rem; }
.hero-dot { color: var(--accent); }
.hero-docs .tagline { font-size: 1.05rem; }
.hero-meta {
  margin: .7rem 0 0;
  font-size: .82rem; color: var(--text-faint); letter-spacing: .03em;
}
.hero-actions { display: flex; gap: .8rem; margin-top: 1.7rem; }
.hero-actions .btn {
  display: inline-flex; align-items: center; gap: .4rem;
  height: 2.4rem; padding: 0 1.15rem; margin-top: 0;
  background: transparent; border: none;
  border-radius: 9px; font-size: .9rem; font-weight: 500;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.hero-actions .btn-primary { background: var(--accent); color: #fff; }
.hero-actions .btn-primary:hover { background: var(--accent-hover); }
.hero-actions .btn-ghost { border: 1px solid var(--border); color: var(--text-muted); }
.hero-actions .btn-ghost:hover { color: var(--text); border-color: var(--text-faint); background: transparent; }

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 1.1rem;
  margin: 1.5rem 0 2rem;
}
.doc-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem 1.1rem;
  background: var(--bg);
  box-shadow: var(--shadow-sm);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.doc-grid > .doc-card { min-width: 0; overflow: hidden; }
.doc-card-list a { overflow-wrap: anywhere; }
.doc-card:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.doc-card-title {
  margin: 0 0 .4rem;
  font-family: var(--serif);
  font-size: 1.05rem; font-weight: 600;
  display: flex; align-items: center; gap: .45rem;
}
.doc-card-icon { font-size: 1rem; }
.doc-card-desc {
  margin: 0 0 .8rem;
  font-size: .82rem; color: var(--text-muted); line-height: 1.6;
}
.doc-card-list { margin: 0; padding: 0; list-style: none; }
.doc-card-list li {
  padding: .32rem 0;
  border-top: 1px dashed var(--border-soft);
  font-size: .875rem;
}
.doc-card-list a { color: var(--text); }
.doc-card-list a:hover { color: var(--accent); }

.home-more {
  display: flex; flex-wrap: wrap; gap: .6rem 1.4rem;
  padding: 1.1rem 0 3rem;
  font-size: .85rem;
}
.home-more a { color: var(--text-muted); }
.home-more a:hover { color: var(--accent); }

/* ---- 搜索弹窗 ---- */
.search-modal { position: fixed; inset: 0; z-index: 60; }
.search-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, .48); }
.search-panel {
  position: relative;
  max-width: 36rem;
  margin: 12vh auto 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.search-input-row {
  display: flex; align-items: center; gap: .6rem;
  padding: .8rem 1rem;
  border-bottom: 1px solid var(--border-soft);
}
.search-input-row > svg {
  width: 1.05rem; height: 1.05rem; flex: none;
  fill: none; stroke: var(--text-faint); stroke-width: 1.8;
}
.search-input-row input {
  flex: 1; min-width: 0;
  border: none; outline: none; background: transparent;
  color: var(--text); font-size: .95rem;
}
.search-close {
  flex: none; cursor: pointer;
  font-family: var(--mono); font-size: .68rem; color: var(--text-faint);
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 5px;
  padding: .18rem .4rem;
}
.search-results { max-height: 55vh; overflow-y: auto; padding: .5rem; }
.search-hint { margin: .6rem; font-size: .84rem; color: var(--text-faint); text-align: center; }
.search-item {
  display: flex; flex-direction: column; gap: .12rem;
  padding: .6rem .8rem; border-radius: 9px;
}
.search-item:hover, .search-item:focus {
  background: var(--accent-soft);
  outline: none;
}
.search-item-section {
  font-size: .68rem; color: var(--text-faint); letter-spacing: .05em;
}
.search-item-title { font-size: .92rem; font-weight: 500; color: var(--text); }
.search-item-summary {
  font-size: .78rem; color: var(--text-muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.search-results mark { background: none; color: var(--accent); font-weight: 600; }

@media (max-width: 960px) {
  .brand-tag { display: none; }
  .search-btn { width: 9rem; }
}

/* ---- 响应式 ---- */
@media (max-width: 1100px) {
  .docs-shell { grid-template-columns: minmax(0, 1fr); gap: 0; }

  .menu-toggle { display: inline-flex; }

  .docs-sidebar {
    position: fixed; z-index: 40;
    top: 0; left: 0; bottom: 0;
    width: min(19rem, 82vw);
    height: 100vh;
    padding: 1.5rem 1.2rem 2rem;
    background: var(--bg);
    border-right: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateX(-105%);
    transition: transform .22s ease;
  }
  .docs-sidebar.open { transform: translateX(0); }
  .sidebar-mask { display: block; }

  .crumbs { padding: 1.1rem 0 .1rem; }
}

@media (max-width: 640px) {
  .site-header .header-inner { padding: 0 1.1rem; }
  .header-left { gap: .8rem; }
  .search-label, .search-btn kbd { display: none; }
  .search-btn { padding: 0 .55rem; height: 2rem; }
  .hero-docs { padding: 2.8rem 0 2rem; }
  .hero-docs h1 { font-size: 2rem; }
  .doc-grid { grid-template-columns: 1fr; }
}

@media print {
  .docs-sidebar, .search-modal, .menu-toggle, .search-btn { display: none !important; }
  .docs-shell { display: block; }
}

/* ===== responsive.css ===== */
/* 响应式与打印 */

/* 宽屏：文章页启用 目录侧栏 双栏 */
@media (min-width: 1200px) {
  .wrap-post.has-toc {
    max-width: 72rem;
    display: grid;
    grid-template-columns: minmax(0, var(--measure)) minmax(180px, 220px);
    gap: 4.5rem;
    justify-content: center;
    align-items: start;
  }
  .wrap-post.has-toc .toc-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 2.5rem);
    max-height: calc(100vh - var(--header-h) - 5rem);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
  }
  .wrap-post.has-toc .toc-inline { display: none; }
}

/* 窄屏 */
@media (max-width: 640px) {
  body { font-size: 16px; line-height: 1.85; }
  .wrap { padding: 0 1.15rem; }
  .hero { padding: 2.8rem 0 2rem; }
  .hero h1 { font-size: 1.95rem; }
  .post { padding: 2.4rem 0 2rem; }
  .post-title { font-size: 1.55rem; }
  .post-content { font-size: 1rem; }
  .post-content h2 { font-size: 1.28rem; margin-top: 2.4rem; }
  .nav { gap: .1rem; margin-left: .1rem; }
  .nav a { font-size: .82rem; padding: .28rem .5rem; border-radius: 8px; }
  .brand-text { display: none; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-next { text-align: left; }
  .to-top { right: 1rem; bottom: 1rem; }
  .code-bar { padding: .35rem .45rem .35rem .8rem; }
  .code-block pre { padding: .9rem 1rem; }
}

@media print {
  .site-header, .site-footer, .to-top, .progress,
  .post-nav, .toc-inline, .toc-rail, .code-bar { display: none !important; }
  body { font-size: 12pt; }
  .code-block { border: 1px solid #ddd; }
}