/* ==========================================================================
   生信入门实战 · 站点样式
   白底黑字 + 深蓝强调 + 硬边细线，读起来清爽，不堆装饰
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --bg-sunken: #eef1f5;
  --fg: #14181f;
  --fg-2: #4a5361;
  --fg-3: #7b8794;
  --line: #e3e8ee;
  --line-strong: #c8d2dd;
  --accent: #12386b;
  --accent-2: #1a5bb5;
  --accent-soft: #eef3fa;
  --ok: #1a7f4b;
  --ok-soft: #eaf6ef;
  --warn: #a8620a;
  --warn-soft: #fdf5e6;
  --err: #b3261e;
  --err-soft: #fdecea;
  --code-bg: #f7f9fb;
  --radius: 3px;
  --sidebar-w: 270px;
  --content-w: 830px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 8px 14px; z-index: 100;
}
.skip:focus { left: 0; }

/* ---------------------------------------------------------------- 顶栏 --- */

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 18px;
  height: 56px; padding: 0 22px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: baseline; gap: 9px; flex: none; }
.brand a { color: var(--fg); font-weight: 700; font-size: 16px; letter-spacing: 0.2px; }
.brand a:hover { text-decoration: none; }
.brand .mark {
  display: inline-block; width: 9px; height: 9px; background: var(--accent);
  transform: rotate(45deg); margin-right: 2px;
}
.brand .tag {
  font-size: 11px; color: var(--fg-3); letter-spacing: 0.6px;
  border-left: 1px solid var(--line-strong); padding-left: 9px;
}
@media (max-width: 720px) { .brand .tag { display: none; } }

.topbar .spacer { flex: 1; }

.searchbtn {
  display: flex; align-items: center; gap: 9px;
  min-width: 210px; padding: 6px 11px;
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  background: var(--bg-soft); color: var(--fg-3);
  font: inherit; font-size: 13.5px; cursor: pointer; text-align: left;
}
.searchbtn:hover { border-color: var(--accent-2); color: var(--fg-2); }
.searchbtn kbd {
  margin-left: auto; font-family: var(--font-mono); font-size: 11px;
  border: 1px solid var(--line-strong); border-radius: 2px;
  padding: 0 4px; color: var(--fg-3); background: #fff;
}
@media (max-width: 860px) { .searchbtn { min-width: 0; } .searchbtn span { display: none; } }
@media (max-width: 560px) { .searchbtn kbd { display: none; } }

.topnav { display: flex; gap: 16px; font-size: 14px; }
.topnav a { color: var(--fg-2); }
@media (max-width: 960px) { .topnav { display: none; } }

/* ------------------------------------------------------------- 主框架 --- */

.shell { display: flex; align-items: flex-start; }

.sidebar {
  flex: none; width: var(--sidebar-w);
  position: sticky; top: 56px; height: calc(100vh - 56px);
  overflow-y: auto; padding: 26px 14px 60px 22px;
  border-right: 1px solid var(--line);
}

.navgroup { margin-bottom: 24px; }
.navgroup > .navlabel {
  font-size: 11px; font-weight: 700; letter-spacing: 1.2px;
  text-transform: uppercase; color: var(--fg-3);
  margin: 0 0 8px 10px;
}
.navitem {
  display: block; padding: 6px 10px; margin-bottom: 1px;
  border-radius: var(--radius); border-left: 2px solid transparent;
  color: var(--fg-2); font-size: 14.5px; line-height: 1.5;
}
.navitem:hover { background: var(--bg-soft); color: var(--fg); text-decoration: none; }
.navitem.active {
  background: var(--accent-soft); border-left-color: var(--accent);
  color: var(--accent); font-weight: 600;
}
.navitem .badge {
  float: right; font-size: 10.5px; font-weight: 600; letter-spacing: 0.4px;
  color: var(--ok); background: var(--ok-soft); border-radius: 2px;
  padding: 1px 5px; margin-top: 4px;
}

.navfoot {
  margin-top: 30px; padding-top: 16px; border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--fg-3); line-height: 1.7;
}

main { flex: 1; min-width: 0; padding: 38px 48px 90px; }
.page { max-width: var(--content-w); margin: 0 auto; }
@media (max-width: 1080px) { main { padding: 32px 30px 80px; } }
@media (max-width: 860px) {
  .sidebar {
    position: fixed; left: 0; top: 56px; z-index: 35;
    background: var(--bg); width: 288px;
    transform: translateX(-102%); transition: transform 0.18s ease;
    box-shadow: 4px 0 24px rgba(15, 23, 42, 0.08);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  main { padding: 26px 20px 70px; }
}

.menubtn {
  display: none; border: 1px solid var(--line-strong); background: #fff;
  border-radius: var(--radius); width: 34px; height: 30px; cursor: pointer;
  font-size: 15px; color: var(--fg-2); line-height: 1; padding: 0;
  align-items: center; justify-content: center;
}
@media (max-width: 860px) { .menubtn { display: flex; } }

/* -------------------------------------------------------------- 内容 --- */

.crumb { font-size: 12.5px; color: var(--fg-3); letter-spacing: 0.3px; margin-bottom: 10px; }
.crumb a { color: var(--fg-3); }

h1 {
  font-size: 31px; line-height: 1.28; letter-spacing: -0.3px;
  margin: 0 0 14px; font-weight: 700;
}
h2 {
  font-size: 22px; line-height: 1.35; font-weight: 700;
  margin: 52px 0 16px; padding-left: 13px;
  border-left: 4px solid var(--accent);
}
h3 { font-size: 17.5px; font-weight: 700; margin: 34px 0 12px; }
h4 { font-size: 15.5px; font-weight: 700; margin: 26px 0 10px; color: var(--fg-2); }
h2 + h3 { margin-top: 22px; }

p { margin: 0 0 15px; }
ul, ol { margin: 0 0 16px; padding-left: 24px; }
li { margin-bottom: 6px; }
li > ul, li > ol { margin-top: 6px; }

hr { border: 0; border-top: 1px solid var(--line); margin: 38px 0; }

blockquote {
  margin: 20px 0; padding: 12px 18px;
  border-left: 3px solid var(--line-strong); background: var(--bg-soft);
  color: var(--fg-2); font-size: 15px;
}
blockquote p:last-child { margin-bottom: 0; }

strong { font-weight: 700; color: var(--fg); }

.lead { font-size: 17px; color: var(--fg-2); line-height: 1.7; margin-bottom: 26px; }

/* 表格 */
table {
  width: 100%; border-collapse: collapse; margin: 20px 0;
  font-size: 14.5px; line-height: 1.6;
}
th, td { border: 1px solid var(--line); padding: 8px 11px; text-align: left; vertical-align: top; }
th { background: var(--bg-soft); font-weight: 700; font-size: 13.5px; color: var(--fg-2); }
tbody tr:hover { background: #fafbfd; }
.tablewrap { overflow-x: auto; margin: 20px 0; }
.tablewrap table { margin: 0; min-width: 520px; }

/* 行内代码 */
code {
  font-family: var(--font-mono); font-size: 0.875em;
  background: var(--bg-sunken); padding: 1.5px 5px; border-radius: 2px;
  color: #0b3d91; word-break: break-word;
}
a code { color: inherit; }

/* 代码块 */
.codeblock {
  position: relative; margin: 20px 0;
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--radius); background: var(--code-bg); overflow: hidden;
}
.codeblock .cbhead {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 10px; border-bottom: 1px solid var(--line);
  background: #fff; font-size: 11.5px; color: var(--fg-3);
  font-family: var(--font-mono); letter-spacing: 0.6px; text-transform: uppercase;
}
.codeblock .cbhead .copy {
  margin-left: auto; border: 1px solid var(--line-strong); background: #fff;
  border-radius: 2px; padding: 1px 8px; font: inherit; cursor: pointer;
  font-size: 11px; color: var(--fg-2);
}
.codeblock .cbhead .copy:hover { border-color: var(--accent-2); color: var(--accent-2); }
.codeblock pre {
  margin: 0; padding: 13px 15px; overflow-x: auto;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.62;
}
.codeblock pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* 提示块 */
.admonition {
  margin: 20px 0; padding: 13px 17px; border-radius: var(--radius);
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  background: var(--accent-soft); font-size: 15px;
}
.admonition .adm-title { font-weight: 700; margin-bottom: 5px; font-size: 14px; }
.admonition p:last-child { margin-bottom: 0; }
.admonition.warn { background: var(--warn-soft); border-left-color: var(--warn); }
.admonition.warn .adm-title { color: var(--warn); }
.admonition.ok { background: var(--ok-soft); border-left-color: var(--ok); }
.admonition.ok .adm-title { color: var(--ok); }
.admonition.err { background: var(--err-soft); border-left-color: var(--err); }
.admonition.err .adm-title { color: var(--err); }
.admonition .adm-title { color: var(--accent); }

/* 完成度标签 */
.pill {
  display: inline-block; font-size: 11.5px; font-weight: 600;
  letter-spacing: 0.3px; padding: 2px 8px; border-radius: 2px;
  border: 1px solid transparent; vertical-align: 1px;
}
.pill.ok { color: var(--ok); background: var(--ok-soft); border-color: #bfe3cd; }
.pill.warn { color: var(--warn); background: var(--warn-soft); border-color: #f0dcb8; }
.pill.info { color: var(--accent-2); background: var(--accent-soft); border-color: #cddff5; }

/* 首页 hero */
.hero { padding: 10px 0 6px; }
.hero .kicker {
  font-size: 12px; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--accent-2); font-weight: 700; margin-bottom: 12px;
}
.hero h1 { font-size: 38px; letter-spacing: -0.6px; margin-bottom: 16px; }
@media (max-width: 620px) { .hero h1 { font-size: 29px; } }
.hero .lead { font-size: 17.5px; max-width: 660px; }

.btnrow { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 6px; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px; border-radius: var(--radius); font-size: 14.5px;
  font-weight: 600; border: 1px solid var(--accent); background: var(--accent);
  color: #fff;
}
.btn:hover { background: #0d2b52; text-decoration: none; color: #fff; }
.btn.ghost { background: #fff; color: var(--accent); }
.btn.ghost:hover { background: var(--accent-soft); color: var(--accent); }

.grid { display: grid; gap: 14px; margin: 22px 0 6px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 860px) { .grid.three { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid.two, .grid.three { grid-template-columns: 1fr; } }

.card {
  display: block; padding: 16px 17px; border: 1px solid var(--line);
  border-radius: var(--radius); background: #fff; color: var(--fg);
}
.card:hover {
  text-decoration: none; border-color: var(--accent-2); background: #fcfdff;
}
.card .cno {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--fg-3);
  letter-spacing: 1px;
}
.card h3 { margin: 6px 0 6px; font-size: 16.5px; }
.card p { margin: 0; font-size: 13.8px; color: var(--fg-2); line-height: 1.65; }
.card .meta { margin-top: 9px; font-size: 12px; color: var(--fg-3); }

/* 步骤条 */
.steps { counter-reset: s; margin: 24px 0; padding: 0; list-style: none; }
.steps > li {
  position: relative; padding: 0 0 22px 46px; margin: 0;
  border-left: 1px solid var(--line); margin-left: 15px;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
  counter-increment: s; content: counter(s);
  position: absolute; left: -15px; top: -2px;
  width: 29px; height: 29px; border-radius: 50%;
  background: #fff; border: 1.5px solid var(--accent); color: var(--accent);
  font-size: 13px; font-weight: 700; display: flex;
  align-items: center; justify-content: center; font-family: var(--font-mono);
}
.steps > li h4 { margin: 2px 0 5px; font-size: 16px; color: var(--fg); }
.steps > li p { margin: 0 0 8px; font-size: 14.5px; color: var(--fg-2); }

/* 脚本卡 */
.scriptcard {
  border: 1px solid var(--line); border-radius: var(--radius);
  margin: 16px 0; overflow: hidden;
}
.scriptcard .sch {
  display: flex; align-items: center; flex-wrap: wrap; gap: 9px;
  padding: 9px 13px; background: var(--bg-soft); border-bottom: 1px solid var(--line);
}
.scriptcard .sch .fname {
  font-family: var(--font-mono); font-size: 13.5px; font-weight: 600;
  color: var(--fg);
}
.scriptcard .sch .spacer { flex: 1; }
.scriptcard .sch a.dl {
  font-size: 12.5px; border: 1px solid var(--line-strong);
  padding: 2px 9px; border-radius: 2px; background: #fff; color: var(--fg-2);
}
.scriptcard .sch a.dl:hover { border-color: var(--accent-2); color: var(--accent-2); text-decoration: none; }
.scriptcard .sbody { padding: 0 13px 4px; font-size: 14.5px; color: var(--fg-2); }
.scriptcard .sbody p { margin: 10px 0; }
.scriptcard details { border-top: 1px solid var(--line); }
.scriptcard details summary {
  cursor: pointer; padding: 9px 13px; font-size: 13.5px; color: var(--accent-2);
  background: #fff;
}
.scriptcard details summary:hover { background: var(--bg-soft); }
.scriptcard details .codeblock { margin: 0; border: 0; border-radius: 0; border-top: 1px solid var(--line); }
.scriptcard details .codeblock .cbhead { background: var(--bg-soft); }

/* 页脚 */
.foot {
  margin-top: 60px; padding-top: 20px; border-top: 1px solid var(--line);
  font-size: 13px; color: var(--fg-3); line-height: 1.8;
}

/* 上一页 / 下一页 */
.pager {
  display: flex; gap: 12px; margin-top: 46px;
  border-top: 1px solid var(--line); padding-top: 20px;
}
.pager a {
  flex: 1; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 11px 14px; color: var(--fg);
}
.pager a:hover { border-color: var(--accent-2); text-decoration: none; }
.pager a .lbl { display: block; font-size: 11.5px; color: var(--fg-3); letter-spacing: 0.6px; }
.pager a.next { text-align: right; }

/* 页内目录（长教程页） */
.pagetoc {
  margin: 20px 0 28px; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--bg-soft);
}
.pagetoc > summary {
  cursor: pointer; padding: 11px 14px; font-size: 13.5px; font-weight: 600;
  color: var(--accent); letter-spacing: 0.3px; list-style: none;
}
.pagetoc > summary::-webkit-details-marker { display: none; }
.pagetoc > summary::before { content: "▾ "; }
.pagetoc:not([open]) > summary::before { content: "▸ "; }
.pagetoc ol {
  margin: 0; padding: 0 18px 12px 34px;
  max-height: 330px; overflow: auto; border-top: 1px solid var(--line);
  padding-top: 10px;
}
.pagetoc li { font-size: 13px; line-height: 1.95; color: var(--fg-2); }
.pagetoc li.t3 { list-style: none; margin-left: 12px; }
.pagetoc li.t3::before { content: "· "; color: var(--fg-3); }
.pagetoc a { color: var(--fg-2); }
.pagetoc a:hover { color: var(--accent-2); }

/* 页内锚点跳转时，给吸顶顶栏留出空间 */
main h1, main h2, main h3, main h4 { scroll-margin-top: 74px; }

/* ------------------------------------------------------------- 搜索 --- */

.searchmodal {
  position: fixed; inset: 0; z-index: 90; display: none;
  background: rgba(16, 24, 40, 0.34); padding: 88px 18px 18px;
}
.searchmodal.open { display: block; }
.searchbox {
  max-width: 660px; margin: 0 auto; background: #fff;
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  overflow: hidden;
}
.searchbox input {
  width: 100%; border: 0; border-bottom: 1px solid var(--line);
  padding: 15px 18px; font: inherit; font-size: 16px; outline: none;
}
.searchresults { max-height: 62vh; overflow-y: auto; }
.sres { display: block; padding: 11px 18px; border-bottom: 1px solid var(--line); color: var(--fg); }
.sres:hover, .sres.active { background: var(--accent-soft); text-decoration: none; }
.sres .st { font-size: 14.5px; font-weight: 600; }
.sres .sp { font-size: 12px; color: var(--fg-3); margin-bottom: 3px; }
.sres .ss { font-size: 13px; color: var(--fg-2); line-height: 1.55; }
.sres .ss em { font-style: normal; background: #fff3bf; padding: 0 2px; }
.searchhint { padding: 14px 18px; font-size: 13px; color: var(--fg-3); }

/* 验证报告表 */
.vrow { display: flex; gap: 12px; align-items: flex-start; padding: 12px 0; border-bottom: 1px solid var(--line); }
.vrow .vname { font-family: var(--font-mono); font-size: 13.5px; font-weight: 600; min-width: 190px; }
@media (max-width: 720px) { .vrow { flex-direction: column; gap: 4px; } .vrow .vname { min-width: 0; } }

/* ------------------------------------------------------- 代码高亮配色 --- */

.codeblock .k, .codeblock .kn, .codeblock .kd, .codeblock .kc, .codeblock .kr,
.codeblock .kt, .codeblock .kp { color: #a626a4; }
.codeblock .s, .codeblock .s1, .codeblock .s2, .codeblock .sb, .codeblock .sc,
.codeblock .sd, .codeblock .se, .codeblock .sh, .codeblock .si, .codeblock .sx,
.codeblock .sr, .codeblock .ss { color: #1a7f4b; }
.codeblock .c, .codeblock .c1, .codeblock .cm, .codeblock .cs, .codeblock .cp,
.codeblock .cpf { color: #8a94a6; font-style: italic; }
.codeblock .nf, .codeblock .fm { color: #1a5bb5; }
.codeblock .nc, .codeblock .nn, .codeblock .ne { color: #b3550a; font-weight: 600; }
.codeblock .nb, .codeblock .bp, .codeblock .nv { color: #12386b; }
.codeblock .m, .codeblock .mi, .codeblock .mf, .codeblock .mh, .codeblock .mo,
.codeblock .il { color: #b3550a; }
.codeblock .o, .codeblock .ow, .codeblock .p { color: #4a5361; }
.codeblock .na { color: #0b6b8f; }
.codeblock .nd { color: #a626a4; }
.codeblock .err { color: #b3261e; }
.codeblock .gd { color: #b3261e; }
.codeblock .gi { color: #1a7f4b; }