/* 兰州大学 · 学生工程师项目文档站 — 共享样式 */
:root{
  --ink:#1f2937;--muted:#6b7280;--line:#e5e7eb;
  --brand:#1d4ed8;--brand-700:#1e40af;--brand-soft:#eff6ff;
  --bg:#f5f6f8;--card:#fff;--tag-in:#dc2626;--tag-out:#059669;
  --shadow:0 1px 3px rgba(16,24,40,.08),0 1px 2px rgba(16,24,40,.04);
  --shadow-lg:0 10px 25px rgba(16,24,40,.12);
  --radius:12px;--nav-w:280px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  color:var(--ink);background:var(--bg);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}

/* ===== 顶栏 ===== */
.topbar{position:sticky;top:0;z-index:100;background:#0f172a;color:#fff;
  padding:0 24px;height:60px;display:flex;align-items:center;gap:14px}
.topbar .logo{font-weight:700;font-size:16px;white-space:nowrap;color:#fff;text-decoration:none}
.topbar .logo span{color:#60a5fa}
.topbar .nav-links{display:flex;gap:4px;margin-left:18px;overflow-x:auto;flex:1}
.topbar .nav-links a{color:#cbd5e1;text-decoration:none;font-size:13.5px;padding:6px 12px;
  border-radius:7px;white-space:nowrap}
.topbar .nav-links a:hover{background:#1e293b;color:#fff}
.topbar .nav-links a.active{background:var(--brand);color:#fff}
.topbar .badge{margin-left:auto;font-size:11.5px;background:#7f1d1d;color:#fecaca;
  padding:4px 12px;border-radius:999px;white-space:nowrap}
#menuBtn{display:none;background:none;border:1px solid #334155;color:#fff;
  font-size:18px;padding:4px 10px;border-radius:7px;cursor:pointer}

/* ===== 首页 ===== */
.hero{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 60%,#1d4ed8 100%);
  color:#fff;padding:56px 32px 44px;text-align:center}
.hero h1{font-size:30px;font-weight:700;letter-spacing:.5px}
.hero .tagline{font-size:15px;color:#bfdbfe;margin-top:10px;max-width:760px;margin-left:auto;margin-right:auto}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;
  max-width:1000px;margin:-26px auto 0;padding:0 24px;position:relative;z-index:5}
.kpi{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-lg);
  padding:18px 20px;text-align:center}
.kpi .num{font-size:24px;font-weight:700;color:var(--brand-700)}
.kpi .lbl{font-size:12.5px;color:var(--muted);margin-top:4px}

.container{max-width:1080px;margin:0 auto;padding:28px 24px 80px}
/* 老板速览 */
.quickbar{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px 26px;margin-bottom:32px}
.quickbar h2{font-size:18px;margin-bottom:4px}
.quickbar .desc{font-size:13.5px;color:var(--muted);margin-bottom:16px}
.quick-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.quick-card{display:block;text-decoration:none;color:var(--ink);
  border:1px solid var(--line);border-radius:10px;padding:14px 16px;transition:.15s}
.quick-card:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateY(-2px)}
.quick-card .t{font-weight:600;font-size:14px}
.quick-card .d{font-size:12.5px;color:var(--muted);margin-top:6px;line-height:1.55}

/* 分层区块 */
.layer{margin-bottom:34px}
.layer-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.layer-head .icon{font-size:22px}
.layer-head h2{font-size:19px}
.layer-head .count{font-size:12px;color:var(--muted);background:#f3f4f6;
  border:1px solid var(--line);padding:2px 10px;border-radius:999px}
.layer-head .hint{font-size:12.5px;color:var(--muted);margin-left:auto}
.doc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.doc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:16px 18px;display:flex;flex-direction:column;gap:8px;
  text-decoration:none;color:var(--ink);transition:.15s}
.doc-card:hover{border-color:var(--brand);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.doc-card .t{font-weight:600;font-size:14.5px;line-height:1.4}
.doc-card .d{font-size:12.5px;color:var(--muted);flex:1;line-height:1.6}
.doc-card .meta{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}
.tag{font-size:10.5px;padding:2px 9px;border-radius:999px;flex-shrink:0}
.tag-in{background:#fee2e2;color:var(--tag-in)}
.tag-out{background:#d1fae5;color:var(--tag-out)}
.tag-neu{background:#f3f4f6;color:var(--muted);border:1px solid var(--line)}

/* ===== 文档详情页 ===== */
.doc-wrap{display:flex;gap:24px;max-width:1180px;margin:0 auto;padding:24px 20px 80px}
.doc-side{width:var(--nav-w);flex-shrink:0;position:sticky;top:76px;align-self:flex-start;
  max-height:calc(100vh - 92px);overflow-y:auto}
.doc-side .side-title{font-size:12px;font-weight:600;color:var(--muted);
  text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}
.doc-side a{display:block;font-size:13px;color:var(--ink);text-decoration:none;
  padding:7px 12px;border-radius:7px;margin-bottom:2px;line-height:1.45}
.doc-side a:hover{background:#f3f4f6}
.doc-side a.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.doc-main{flex:1;min-width:0}
.breadcrumb{font-size:12.5px;color:var(--muted);margin-bottom:12px}
.breadcrumb a{color:var(--brand);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.doc-head{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px 28px;margin-bottom:18px}
.doc-head h1{font-size:23px;line-height:1.4}
.doc-head .meta{display:flex;align-items:center;gap:10px;margin-top:10px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.doc-head .path{font-family:ui-monospace,Menlo,monospace;font-size:11.5px}
.doc-body{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:28px 34px;overflow-x:auto}

/* ===== markdown 元素 ===== */
.doc-body h1{font-size:22px;margin:18px 0 12px;padding-bottom:8px;border-bottom:2px solid var(--brand)}
.doc-body h2{font-size:18.5px;margin:24px 0 10px;color:#111827}
.doc-body h3{font-size:16px;margin:18px 0 8px;color:#111827}
.doc-body h4{font-size:14.5px;margin:14px 0 6px}
.doc-body p{margin:9px 0}
.doc-body ul,.doc-body ol{margin:9px 0 9px 24px}
.doc-body li{margin:5px 0}
.doc-body strong{color:#111827}
.doc-body blockquote{border-left:4px solid var(--brand);background:var(--brand-soft);
  padding:12px 16px;margin:14px 0;border-radius:0 8px 8px 0;color:#1e3a8a}
.doc-body code{background:#f3f4f6;border:1px solid var(--line);border-radius:4px;
  padding:1px 6px;font-size:12.5px;font-family:ui-monospace,Menlo,monospace}
.doc-body pre{background:#0f172a;color:#e2e8f0;padding:16px 18px;border-radius:10px;
  overflow-x:auto;margin:14px 0;font-size:12.8px;line-height:1.6}
.doc-body pre code{background:none;border:none;color:inherit;padding:0;font-size:inherit}
.doc-body table{border-collapse:collapse;width:100%;margin:14px 0;font-size:13.5px;display:block;overflow-x:auto}
.doc-body th,.doc-body td{border:1px solid var(--line);padding:8px 13px;text-align:left;vertical-align:top}
.doc-body th{background:#f3f4f6;font-weight:600;white-space:nowrap}
.doc-body tr:nth-child(even){background:#fafbfc}
.doc-body hr{border:none;border-top:2px solid var(--line);margin:24px 0}
.doc-body img{max-width:100%}
.doc-body input[type=checkbox]{margin-right:4px}

/* 详情页底部：同层导航 */
.doc-footer{margin-top:22px;display:flex;gap:12px}
.doc-footer a{flex:1;background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:14px 18px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:.15s}
.doc-footer a:hover{border-color:var(--brand)}
.doc-footer .dir{font-size:11px;color:var(--muted)}
.doc-footer .tt{font-size:13.5px;font-weight:600;margin-top:3px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
.doc-footer a.next{text-align:right}

/* 页脚 */
.site-footer{background:#0f172a;color:#94a3b8;padding:28px 24px;text-align:center;font-size:12.5px;line-height:2}

/* 移动端 */
@media(max-width:900px){
  #menuBtn{display:block}
  .topbar .nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:#0f172a;
    flex-direction:column;padding:10px 16px;border-top:1px solid #1e293b}
  .topbar .nav-links.open{display:flex}
  .doc-wrap{flex-direction:column}
  .doc-side{position:static;width:100%;max-height:none}
  .doc-body{padding:18px 16px}
  .hero{padding:40px 20px 36px}
  .hero h1{font-size:22px}
}