/* ============================================================
   DSH 源码精读 — 共享样式 v2
   取向：宽版心 · 大字号 · 行级代码解读 · 树状导航 · 离线无依赖
   ============================================================ */

:root {
  --bg: #faf9f5;
  --panel: #ffffff;
  --ink: #232530;
  --ink-2: #565b6b;
  --ink-3: #8b90a0;
  --line: #e5e2d9;
  --line-2: #efede6;
  --accent: #3d5ce0;
  --accent-soft: #eef0fc;
  --accent-ink: #2b46b8;
  --code-bg: #f6f5f0;
  --code-line: #e9e7df;
  --code-num: #b9b6a9;
  --comment: #8f9a6d;
  --keyword: #7a4bd6;
  --string: #b0562e;
  --number: #2e7d9e;
  --func: #2b46b8;
  --type: #1f7a5c;
  --warn-bg: #fdf6e3;
  --warn-line: #e0a94e;
  --info-bg: #eef5fb;
  --info-line: #4a90d9;
  --key-bg: #f1eefc;
  --key-line: #7a6cf0;
  --ok-bg: #eaf6ee;
  --ok-line: #2e9e5b;
  --fork-bg: #fdf3e9;
  --fork-line: #e08a3c;
  --mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.9;
  letter-spacing: 0.006em;
  -webkit-font-smoothing: antialiased;
}

::selection { background: #d8defc; }

/* ---------------- 左侧树状导航 ---------------- */

.nav {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 268px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 26px 14px 18px;
  overflow-y: auto;
  z-index: 10;
}

.nav-head { padding: 0 10px 16px; border-bottom: 1px solid var(--line-2); margin-bottom: 12px; }

.nav-logo {
  display: inline-block;
  width: 40px; height: 40px;
  line-height: 40px;
  text-align: center;
  background: linear-gradient(135deg, #4d6bfe, #2b46b8);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  border-radius: 10px;
}

.nav-title {
  display: inline-block;
  vertical-align: middle;
  margin-left: 10px;
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
}

.nav-sub { display: block; margin-left: 50px; font-size: 12.5px; color: var(--ink-3); }

.nav-group {
  margin: 14px 0 4px;
  padding: 0 10px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.nav-list { list-style: none; margin: 0; padding: 0; }

.nav-list li { margin: 2px 0; }

.nav-list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14.5px;
  line-height: 1.5;
  transition: background .15s, color .15s;
}

.nav-list a:hover { background: var(--bg); color: var(--ink); }

.nav-list a.active { background: var(--accent-soft); color: var(--accent-ink); font-weight: 650; }

.nav-list .idx { font-family: var(--mono); font-size: 11px; color: var(--ink-3); min-width: 24px; }

.nav-list a.active .idx { color: var(--accent); }

/* 树状缩进：分支页相对主干缩进 */
.nav-list .branch a { padding-left: 26px; font-size: 14px; }
.nav-list .branch a .idx { min-width: 26px; }

.nav-foot {
  margin-top: 16px;
  padding: 12px 10px;
  border-top: 1px solid var(--line-2);
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.7;
}

/* ---------------- 主内容（宽版心） ---------------- */

main { margin-left: 268px; }

article {
  max-width: 1560px;
  margin: 0 auto;
  padding: 42px 56px 100px;
}

/* ---------------- 调用链位置条 ---------------- */

.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 18px;
  padding: 10px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
}

.chain .seg { color: var(--ink-2); }

.chain .here {
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 1px 12px;
  font-weight: 700;
}

.chain .arrow { color: var(--ink-3); }

/* ---------------- 页头 ---------------- */

.page-head { margin-bottom: 6px; }

.kicker {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 { margin: 0 0 10px; font-size: 32px; line-height: 1.35; }

.lede { margin: 0 0 8px; font-size: 18.5px; color: var(--ink-2); line-height: 1.85; }

.meta-line { font-size: 13.5px; color: var(--ink-3); font-family: var(--mono); }

.meta-line code { background: transparent; }

/* ---------------- 页内目录 ---------------- */

.toc {
  margin: 24px 0 8px;
  padding: 14px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 15px;
}

.toc-title {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.toc ol { margin: 0; padding-left: 24px; columns: 2; column-gap: 40px; }

.toc li { margin: 3px 0; }

.toc a { color: var(--ink-2); text-decoration: none; border-bottom: 1px solid transparent; }

.toc a:hover { color: var(--accent-ink); border-bottom-color: var(--accent); }

.toc a.active { color: var(--accent-ink); font-weight: 600; }

/* ---------------- 章节 ---------------- */

section { margin-top: 52px; scroll-margin-top: 26px; }

h2 {
  font-size: 24px;
  line-height: 1.45;
  margin: 0 0 14px;
  padding-bottom: 9px;
  border-bottom: 2px solid var(--line);
}

h2 .sec-num {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--mono);
  font-size: 15.5px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 1px 9px;
  vertical-align: 2px;
}

h3 { font-size: 19px; margin: 30px 0 10px; }

p { margin: 11px 0; }

strong { font-weight: 650; }

em { font-style: normal; color: var(--accent-ink); font-weight: 600; }

/* ---------------- 行内代码 ---------------- */

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--code-bg);
  border: 1px solid var(--code-line);
  border-radius: 5px;
  padding: 1px 6px;
  color: #33384a;
  white-space: nowrap;
}

code.path { color: var(--accent-ink); background: var(--accent-soft); border-color: #dde1f8; }

/* ---------------- 代码块（行级解读的载体） ---------------- */

figure.code {
  margin: 18px 0;
  background: var(--code-bg);
  border: 1px solid var(--code-line);
  border-radius: 12px;
  overflow: hidden;
}

figure.code figcaption {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: #f0efe9;
  border-bottom: 1px solid var(--code-line);
  font-size: 13.5px;
  color: var(--ink-2);
}

figure.code figcaption .fname { font-family: var(--mono); font-weight: 700; color: var(--ink); font-size: 14px; }

figure.code figcaption .ln-range { margin-left: auto; font-family: var(--mono); color: var(--ink-3); white-space: nowrap; }

figure.code pre {
  margin: 0;
  padding: 14px 0;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 1.8;
  tab-size: 2;
}

figure.code pre code { background: transparent; border: none; border-radius: 0; padding: 0; white-space: pre; display: block; }

.code-line { display: block; padding: 0 18px; min-width: max-content; }

.code-line .ln {
  display: inline-block;
  width: 3.4em;
  margin-right: 16px;
  text-align: right;
  color: var(--code-num);
  user-select: none;
}

.code-line.hl {
  background: linear-gradient(90deg, #e9ecfc 0%, #eef0fc 86%, rgba(238,240,252,0) 100%);
  box-shadow: inset 3px 0 0 var(--accent);
}

.code-line.dim { opacity: .5; }

.tok-c { color: var(--comment); font-style: italic; }
.tok-k { color: var(--keyword); font-weight: 600; }
.tok-s { color: var(--string); }
.tok-n { color: var(--number); }
.tok-f { color: var(--func); }
.tok-t { color: var(--type); }

/* ---------------- 行级解读（代码段后锚定行号的解读块） ---------------- */

.le {
  margin: 10px 0 26px;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 10px 10px 0;
}

.le .lr {
  display: flex;
  gap: 14px;
  padding: 7px 14px 7px 0;
  align-items: baseline;
}

.le .lr + .lr { border-top: 1px dashed rgba(61,92,224,.22); }

.le .ln-ref {
  flex: none;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: 1px 10px;
  white-space: nowrap;
  transform: translateY(-1px);
}

.le .lr p { margin: 0; font-size: 15.5px; line-height: 1.85; color: #33384d; }

.le .lr p code { font-size: 0.85em; }

/* ---------------- 分岔点标注 ---------------- */

.fork {
  margin: 26px 0;
  padding: 16px 20px 16px 52px;
  background: var(--fork-bg);
  border: 1px solid #f0d9b6;
  border-radius: 12px;
  position: relative;
}

.fork::before {
  content: "◈";
  position: absolute;
  left: 16px; top: 15px;
  font-size: 20px;
  color: var(--fork-line);
}

.fork .fork-tag {
  display: block;
  font-family: var(--mono);
  font-size: 13.5px;
  font-weight: 700;
  color: #a35c14;
  margin-bottom: 4px;
}

.fork .fork-tag a { color: #a35c14; }

.fork p { margin: 4px 0 0; font-size: 15.5px; line-height: 1.85; color: #5a4630; }

.fork p code { background: #fdf7ec; }


/* ---------------- 示例轨迹（真实命令 dsh web 的逐步数据） ---------------- */

.trace {
  margin: 22px 0;
  background: #fbf8ef;
  border: 1px solid #e6ddc2;
  border-radius: 12px;
  overflow: hidden;
}

.trace-head {
  padding: 9px 16px;
  background: #f3eeda;
  border-bottom: 1px solid #e6ddc2;
  font-size: 13px;
  font-weight: 700;
  color: #8a7440;
  letter-spacing: .08em;
}

.trace-head .cmd { font-family: var(--mono); color: #5c4d28; letter-spacing: 0; }

.trace pre {
  margin: 0;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.75;
  overflow-x: auto;
  color: #4a4130;
}

.trace .src {
  padding: 2px 16px 10px;
  font-size: 12.5px;
  color: #9a8a5c;
  line-height: 1.7;
}

/* ---------------- 标注框 ---------------- */

.callout {
  margin: 20px 0;
  padding: 15px 20px 15px 52px;
  border-radius: 10px;
  border: 1px solid;
  position: relative;
  font-size: 16px;
  line-height: 1.85;
}

.callout::before {
  position: absolute;
  left: 17px; top: 15px;
  font-size: 13.5px;
  font-weight: 800;
  font-family: var(--mono);
}

.callout.key    { background: var(--key-bg);  border-color: #d9d2f9; }
.callout.key::before   { content: "关键"; color: var(--key-line); }
.callout.warn   { background: var(--warn-bg); border-color: #eed9a8; }
.callout.warn::before  { content: "易错"; color: var(--warn-line); }
.callout.info   { background: var(--info-bg); border-color: #c3dcf1; }
.callout.info::before  { content: "背景"; color: var(--info-line); }
.callout.verify { background: var(--ok-bg);   border-color: #bfe3cd; }
.callout.verify::before{ content: "验证"; color: var(--ok-line); }

.callout p { margin: 5px 0; }
.callout p:first-child { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

/* ---------------- 表格 ---------------- */

.tbl-wrap { overflow-x: auto; margin: 18px 0; }

table.tbl {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  font-size: 15.5px;
}

table.tbl th {
  background: #f4f2ec;
  text-align: left;
  font-weight: 650;
  font-size: 13.5px;
  color: var(--ink-2);
  letter-spacing: 0.04em;
  padding: 10px 15px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

table.tbl td { padding: 10px 15px; border-bottom: 1px solid var(--line-2); vertical-align: top; line-height: 1.75; }

table.tbl tr:last-child td { border-bottom: none; }

table.tbl td code { white-space: normal; }

/* ---------------- 图解（SVG 大图） ---------------- */

figure.fig {
  margin: 24px 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 20px 14px;
  text-align: center;
}

figure.fig svg { width: 100%; height: auto; }

figure.fig figcaption { margin-top: 12px; font-size: 14px; color: var(--ink-3); text-align: center; }

.dg text { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; }

.dg text.t  { fill: #232530; font-size: 14.5px; }
.dg text.ts { fill: #5a5e6e; font-size: 12.5px; }
.dg text.th { fill: #232530; font-size: 14.5px; font-weight: 700; }
.dg text.note { fill: #8b90a0; font-size: 12.5px; }
.dg text.acc { fill: #2b46b8; font-size: 12.5px; font-weight: 600; }

.dg .box { fill: #ffffff; stroke: #c9c6bb; stroke-width: 1.4; rx: 9; }
.dg .acc { fill: #eef0fc; stroke: #3d5ce0; stroke-width: 1.5; rx: 9; }
.dg .evt { fill: #fdf3e7; stroke: #e0a94e; stroke-width: 1.5; rx: 9; }
.dg .log { fill: #e8f4ec; stroke: #2e9e5b; stroke-width: 1.5; rx: 9; }
.dg .dim { fill: #f7f6f1; stroke: #d8d4c8; stroke-width: 1.2; stroke-dasharray: 5 4; rx: 9; }
.dg .lane { fill: none; stroke: #e8e5dc; stroke-width: 1.2; stroke-dasharray: 6 5; }

.dg .a  { stroke: #9a9eb0; stroke-width: 1.6; fill: none; }
.dg .ad { stroke: #9a9eb0; stroke-width: 1.6; fill: none; stroke-dasharray: 5 4; }
.dg .hl-arrow { stroke: var(--accent); stroke-width: 1.8; fill: none; }
.dg .hd { fill: #9a9eb0; }
.dg .hd-acc { fill: #3d5ce0; }

/* ---------------- 上一页/下一页 ---------------- */

.prevnext {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 64px;
  padding-top: 22px;
  border-top: 2px solid var(--line);
}

.prevnext a {
  flex: 1;
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 15px 20px;
  text-decoration: none;
  color: var(--ink);
  transition: border-color .15s;
}

.prevnext a:hover { border-color: #cfd5f2; }

.prevnext .dir { font-size: 12.5px; color: var(--ink-3); font-family: var(--mono); }

.prevnext .t { display: block; margin-top: 4px; font-weight: 650; font-size: 16px; }

.prevnext .next { text-align: right; }

/* ---------------- 其他 ---------------- */

hr.sep { border: none; border-top: 1px dashed var(--line); margin: 42px 0; }

ul, ol { padding-left: 26px; }
li { margin: 6px 0; }

blockquote {
  margin: 18px 0;
  padding: 12px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 10px 10px 0;
  color: var(--ink-2);
}

@media (max-width: 1200px) {
  .nav { position: static; width: auto; padding: 16px 18px 12px; border-right: none; border-bottom: 1px solid var(--line); }
  .nav-head { padding-bottom: 10px; margin-bottom: 8px; }
  .nav-group { display: none; }
  .nav-list { display: flex; flex-wrap: wrap; gap: 4px; }
  .nav-list li { margin: 0; }
  .nav-list a { padding: 5px 10px; font-size: 13px; }
  .nav-list .branch a { padding-left: 10px; }
  .nav-foot { display: none; }
  main { margin-left: 0; }
  article { padding: 24px 18px 72px; }
  .toc ol { columns: 1; }
}