:root {
  --primary: #1a6ee0;
  --primary-dark: #0f4fa8;
  --primary-light: #e8f1fd;
  --accent: #0ea5a5;
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #1f2d3d;
  --text-2: #5b6b7c;
  --border: #e3e9f0;
  --red: #d64545;
  --green: #1c9e6a;
  --orange: #e08a1a;
  --shadow: 0 1px 3px rgba(20, 50, 90, .08), 0 4px 14px rgba(20, 50, 90, .06);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.65;
}

/* ---------- Top bar ---------- */
.topbar {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary) 60%, #2f86f0);
  color: #fff; padding: 14px 24px; position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 10px rgba(10, 40, 90, .25);
}
.topbar-inner { max-width: 1440px; margin: 0 auto; display: flex; align-items: center; gap: 32px; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-icon {
  width: 42px; height: 42px; border-radius: 10px; background: rgba(255,255,255,.18);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.logo h1 { font-size: 20px; letter-spacing: 1px; }
.logo-sub { font-size: 12px; opacity: .85; }
.search-box { flex: 1; min-width: 260px; max-width: 560px; position: relative; }
.search-box input {
  width: 100%; padding: 10px 16px; border: none; border-radius: 8px; font-size: 14px;
  outline: none; background: rgba(255,255,255,.95);
}
.search-results {
  position: absolute; top: 46px; left: 0; right: 0; background: #fff; color: var(--text);
  border-radius: 10px; box-shadow: var(--shadow); max-height: 420px; overflow-y: auto; z-index: 200;
  border: 1px solid var(--border);
}
.search-results .sr-item { padding: 10px 16px; cursor: pointer; border-bottom: 1px solid var(--border); }
.search-results .sr-item:hover { background: var(--primary-light); }
.search-results .sr-item .sr-cat { font-size: 12px; color: var(--primary); margin-right: 8px; }
.search-results .sr-item .sr-desc { font-size: 12px; color: var(--text-2); display: block; }
.hidden { display: none !important; }

/* ---------- Layout ---------- */
.layout { max-width: 1440px; margin: 0 auto; display: flex; gap: 20px; padding: 20px 24px; align-items: flex-start; }
.sidebar {
  width: 220px; flex-shrink: 0; background: var(--card); border-radius: 12px; box-shadow: var(--shadow);
  padding: 12px 0; position: sticky; top: 90px;
}
.sidebar ul { list-style: none; }
.sidebar li {
  padding: 11px 20px; cursor: pointer; font-size: 14px; color: var(--text-2);
  border-left: 3px solid transparent; transition: all .15s;
}
.sidebar li:hover { background: var(--primary-light); color: var(--primary); }
.sidebar li.active { background: var(--primary-light); color: var(--primary); border-left-color: var(--primary); font-weight: 600; }
.nav-ico { margin-right: 8px; }
.sidebar-note { padding: 14px 18px; font-size: 11.5px; color: var(--text-2); border-top: 1px solid var(--border); margin-top: 10px; }

.content { flex: 1; min-width: 0; }

/* ---------- Cards & typography ---------- */
.section-title { font-size: 22px; margin-bottom: 6px; }
.section-desc { color: var(--text-2); font-size: 14px; margin-bottom: 18px; }
.card { background: var(--card); border-radius: 12px; box-shadow: var(--shadow); padding: 22px 24px; margin-bottom: 18px; }
.card h3 { font-size: 17px; margin-bottom: 12px; color: var(--primary-dark); display: flex; align-items: center; gap: 8px; }
.card h4 { font-size: 15px; margin: 14px 0 8px; color: var(--text); }
.card p { font-size: 14px; margin-bottom: 8px; }
.card ul, .card ol { padding-left: 22px; font-size: 14px; margin-bottom: 8px; }
.card li { margin-bottom: 4px; }

table.tb { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 10px 0; }
table.tb th { background: var(--primary-light); color: var(--primary-dark); padding: 9px 10px; text-align: left; border: 1px solid var(--border); white-space: nowrap; }
table.tb td { padding: 8px 10px; border: 1px solid var(--border); vertical-align: top; }
table.tb tr:nth-child(even) td { background: #fafcfe; }
.tb-wrap { overflow-x: auto; }

.tag { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; margin: 2px 4px 2px 0; background: var(--primary-light); color: var(--primary); }
.tag.red { background: #fdeaea; color: var(--red); }
.tag.green { background: #e6f7ef; color: var(--green); }
.tag.orange { background: #fdf3e3; color: var(--orange); }
.tag.teal { background: #e3f6f6; color: var(--accent); }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }

/* home stat cards */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 18px; }
.stat-card { background: var(--card); border-radius: 12px; box-shadow: var(--shadow); padding: 18px 20px; border-top: 4px solid var(--primary); }
.stat-card .num { font-size: 24px; font-weight: 700; color: var(--primary-dark); }
.stat-card .lbl { font-size: 13px; color: var(--text-2); }

/* filter bar */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.filter-bar select, .filter-bar input {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 13.5px;
  background: #fff; outline: none;
}
.filter-bar select:focus, .filter-bar input:focus { border-color: var(--primary); }
.filter-bar .fb-label { font-size: 13px; color: var(--text-2); }

/* item cards */
.item-card { background: var(--card); border-radius: 12px; box-shadow: var(--shadow); padding: 20px 22px; margin-bottom: 16px; border-left: 4px solid var(--primary); }
.item-card h3 { font-size: 16px; margin-bottom: 8px; color: var(--primary-dark); }
.item-card .meta { font-size: 12.5px; color: var(--text-2); margin-bottom: 8px; }
.item-card p { font-size: 14px; margin-bottom: 6px; }
.item-card ul { padding-left: 20px; font-size: 13.5px; }
.kv { display: flex; font-size: 13.5px; margin-bottom: 4px; }
.kv .k { width: 110px; flex-shrink: 0; color: var(--text-2); }
.kv .v { flex: 1; }

.alert { border-radius: 10px; padding: 12px 16px; font-size: 13.5px; margin: 12px 0; }
.alert.info { background: var(--primary-light); border-left: 4px solid var(--primary); }
.alert.warn { background: #fdf3e3; border-left: 4px solid var(--orange); }
.alert.danger { background: #fdeaea; border-left: 4px solid var(--red); }
.alert.ok { background: #e6f7ef; border-left: 4px solid var(--green); }

/* calculator */
.calc-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.calc-field label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 4px; }
.calc-field input, .calc-field select { width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none; }
.calc-field input:focus, .calc-field select:focus { border-color: var(--primary); }
.btn {
  background: var(--primary); color: #fff; border: none; padding: 10px 28px; border-radius: 8px;
  font-size: 14px; cursor: pointer; transition: background .15s;
}
.btn:hover { background: var(--primary-dark); }
.calc-result { margin-top: 18px; }
.result-bar { display: flex; height: 34px; border-radius: 8px; overflow: hidden; margin: 12px 0; font-size: 13px; color: #fff; }
.result-bar > div { display: flex; align-items: center; justify-content: center; min-width: 0; overflow: hidden; white-space: nowrap; transition: width .4s; }

/* guide wizard */
.wiz-step { background: var(--card); border-radius: 12px; box-shadow: var(--shadow); padding: 26px; margin-bottom: 16px; }
.wiz-q { font-size: 17px; font-weight: 600; margin-bottom: 16px; }
.wiz-opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.wiz-opt {
  border: 2px solid var(--border); border-radius: 10px; padding: 14px 16px; cursor: pointer;
  font-size: 14px; transition: all .15s; background: #fff;
}
.wiz-opt:hover { border-color: var(--primary); background: var(--primary-light); }
.wiz-opt .wo-title { font-weight: 600; margin-bottom: 4px; }
.wiz-opt .wo-desc { font-size: 12.5px; color: var(--text-2); }
.wiz-result h3 { color: var(--primary-dark); margin-bottom: 10px; }
.wiz-back { background: none; border: 1px solid var(--border); border-radius: 8px; padding: 8px 16px; font-size: 13px; cursor: pointer; color: var(--text-2); margin-bottom: 14px; }
.wiz-back:hover { border-color: var(--primary); color: var(--primary); }

.footer { text-align: center; padding: 22px; font-size: 12.5px; color: var(--text-2); }

@media (max-width: 900px) {
  .layout { flex-direction: column; padding: 14px; }
  .sidebar { width: 100%; position: static; }
  .sidebar ul { display: flex; flex-wrap: wrap; }
  .sidebar li { border-left: none; border-radius: 8px; padding: 8px 12px; }
}