/* 翰德元脑 · 统一设计系统 */
:root {
  --navy-900: #16294d;
  --navy-700: #1e3c72;
  --blue-600: #2a5298;
  --blue-500: #3b5bdb;
  --ink: #26241f;
  --gray: #7a766c;
  --line: #e4e0d5;
  --bg: #f5f6fa;
  --card: #ffffff;
  --green: #2f9e44;
  --green-bg: #e6f4ea;
  --orange: #e8590c;
  --orange-bg: #fff3e0;
  --red: #c0392b;
  --red-bg: #fdecea;
  --purple: #7950f2;
  --purple-bg: #f0ebff;
  --amber-bg: #fff8e1;
  --radius: 12px;
  --shadow: 0 1px 4px rgba(0,0,0,.07), 0 4px 16px rgba(0,0,0,.05);
  --sidebar-w: 224px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue-500); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== 布局：固定侧边栏 + 主区 ===== */
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: var(--sidebar-w);
  background: linear-gradient(180deg, #1e3c72 0%, #16294d 100%);
  color: #dfe6f2; display: flex; flex-direction: column;
  z-index: 20; overflow-y: auto;
}
.brand { padding: 22px 20px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.brand .logo { font-size: 20px; font-weight: 700; color: #fff; letter-spacing: 1px; }
.brand .tagline { font-size: 11px; color: #9db2d6; margin-top: 4px; }
.nav { padding: 12px 10px; display: flex; flex-direction: column; gap: 2px; }
.nav a {
  display: flex; align-items: center; gap: 10px; color: #cfd9ec;
  padding: 10px 12px; border-radius: 8px; font-size: 14px;
  transition: background .15s, color .15s;
}
.nav a:hover { background: rgba(255,255,255,.08); color: #fff; text-decoration: none; }
.nav a.active { background: linear-gradient(90deg, #2a5298, #3b5bdb); color: #fff; font-weight: 600; }
.nav a .ico { font-size: 16px; width: 20px; text-align: center; }
.nav .group-label { font-size: 11px; color: #7d91b8; padding: 14px 12px 4px; letter-spacing: 2px; }
.sidebar .foot { margin-top: auto; padding: 14px 20px; font-size: 11px; color: #7d91b8; border-top: 1px solid rgba(255,255,255,.08); }

.main { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }
.topbar {
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 16px 32px; display: flex; align-items: center; gap: 14px;
  position: sticky; top: 0; z-index: 10;
}
.topbar .title { font-size: 19px; font-weight: 700; color: var(--navy-700); }
.topbar .subtitle { font-size: 12.5px; color: var(--gray); margin-left: 2px; }
.topbar .spacer { flex: 1; }
.topbar .actions { display: flex; gap: 8px; align-items: center; }
/* 内容区：全宽自适应（杨校长 2026-09-01 要求不浪费屏幕宽度）；长文阅读由 .md 内部限宽 */
.content { padding: 26px 32px 60px; width: 100%; }
.md { max-width: 1000px; }

/* ===== 通用组件 ===== */
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .main { margin-left: 0; }
}

.card {
  background: var(--card); border-radius: var(--radius); padding: 20px 22px;
  box-shadow: var(--shadow); border: 1px solid #eceef3;
}
.card h3 { font-size: 15px; color: var(--navy-700); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.card h3 .tip { font-size: 12px; color: var(--gray); font-weight: 400; }

/* 统计卡 */
.stat { background: var(--card); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow); border: 1px solid #eceef3; }
.stat .label { font-size: 12.5px; color: var(--gray); }
.stat .value { font-size: 26px; font-weight: 700; color: var(--navy-900); margin-top: 4px; letter-spacing: .5px; }
.stat .value small { font-size: 13px; font-weight: 400; color: var(--gray); }
.stat .delta { font-size: 12px; margin-top: 4px; }
.stat.accent { border-left: 4px solid var(--blue-600); }
.stat.good { border-left: 4px solid var(--green); }
.stat.warn { border-left: 4px solid var(--orange); }
.stat.bad { border-left: 4px solid var(--red); }

.badge { display: inline-block; font-size: 11px; padding: 2px 9px; border-radius: 999px; font-weight: 600; }
.badge.green { background: var(--green-bg); color: #1b7a3d; }
.badge.orange { background: var(--orange-bg); color: #b45309; }
.badge.red { background: var(--red-bg); color: #b02a1a; }
.badge.blue { background: #eef2ff; color: var(--blue-500); }
.badge.gray { background: #f0f1f5; color: #6b7280; }
.badge.purple { background: var(--purple-bg); color: var(--purple); }
.badge.amber { background: var(--amber-bg); color: #946200; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
  border: none; border-radius: 8px; font-size: 13.5px; font-weight: 600; cursor: pointer;
  background: var(--blue-600); color: #fff; transition: filter .15s, transform .05s;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn.green { background: var(--green); }
.btn.orange { background: var(--orange); }
.btn.purple { background: var(--purple); }
.btn.ghost { background: #eef2ff; color: var(--blue-500); }
.btn.sm { padding: 5px 12px; font-size: 12.5px; }

input[type=text], input[type=number], select, textarea {
  padding: 8px 12px; border: 1px solid #d7dbe4; border-radius: 8px; font-size: 13.5px;
  font-family: inherit; background: #fff; color: var(--ink); width: 100%;
}
input:focus, textarea:focus, select:focus { outline: 2px solid #c7d5ff; border-color: var(--blue-500); }
label { font-size: 13px; color: var(--gray); }

table.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; vertical-align: top; }
.tbl th { background: #f6f7fb; font-weight: 600; color: var(--navy-700); white-space: nowrap; }
.tbl tr:nth-child(even) td { background: #fbfcfe; }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; }

.list-item { display: flex; align-items: center; gap: 12px; padding: 11px 6px; border-bottom: 1px solid #f0f1f5; }
.list-item:last-child { border-bottom: none; }
.list-item .li-ico { font-size: 18px; }
.list-item .li-body { flex: 1; min-width: 0; }
.list-item .li-title { font-weight: 600; color: var(--navy-900); font-size: 14px; }
.list-item .li-title a { color: inherit; }
.list-item .li-title a:hover { color: var(--blue-500); }
.list-item .li-meta { font-size: 12px; color: var(--gray); }

.notice { border-radius: 10px; padding: 14px 18px; font-size: 13.5px; margin-bottom: 16px; }
.notice.info { background: #eef2ff; color: #2a3f9e; border-left: 4px solid var(--blue-500); }
.notice.warn { background: var(--orange-bg); color: #9a4a05; border-left: 4px solid var(--orange); }
.notice.danger { background: var(--red-bg); color: #9a2417; border-left: 4px solid var(--red); }
.notice.ok { background: var(--green-bg); color: #1b6d37; border-left: 4px solid var(--green); }

.empty { text-align: center; color: #a0a4b0; padding: 48px 20px; font-size: 13.5px; }
.muted { color: var(--gray); font-size: 12.5px; }
.section-title { font-size: 16px; font-weight: 700; color: var(--navy-700); margin: 26px 0 12px; display: flex; align-items: center; gap: 8px; }
.hr { border: none; border-top: 1px solid var(--line); margin: 18px 0; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.mt { margin-top: 16px; }
.mb { margin-bottom: 16px; }

/* ===== Markdown 渲染区 ===== */
.md { line-height: 1.8; }
.md h1 { font-size: 22px; color: var(--navy-900); margin: 8px 0 14px; }
.md h2 { font-size: 17px; color: var(--navy-700); margin: 22px 0 10px; padding-bottom: 6px; border-bottom: 2px solid #edf0f6; }
.md h3 { font-size: 15px; color: var(--blue-600); margin: 18px 0 8px; }
.md h4 { font-size: 14px; color: var(--navy-700); margin: 14px 0 6px; }
.md p { margin: 8px 0; }
.md ul, .md ol { margin: 8px 0; padding-left: 22px; }
.md li { margin: 3px 0; }
.md table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 13.5px; }
.md th, .md td { border: 1px solid var(--line); padding: 7px 11px; text-align: left; vertical-align: top; }
.md th { background: #f6f7fb; font-weight: 600; }
.md blockquote { margin: 12px 0; padding: 10px 16px; background: #f6f7fb; border-left: 4px solid var(--blue-600); color: #5b6577; border-radius: 0 8px 8px 0; }
.md code { background: #f0f1f5; padding: 1px 6px; border-radius: 4px; font-size: 12.5px; }
.md pre { background: #1f2430; color: #e6e9ef; padding: 13px 16px; border-radius: 8px; overflow-x: auto; margin: 12px 0; }
.md pre code { background: none; padding: 0; color: inherit; }
.md a { color: var(--blue-500); }
.md hr { border: none; border-top: 1px solid var(--line); margin: 16px 0; }
.md strong { color: var(--navy-900); }