/* ==========================================================================
   智策研习 · 财务数字化学习平台
   设计系统 — 沿用专业站视觉基因（色板/圆角/阴影/卡片/徽章/等宽数字）
   ========================================================================== */

:root {
  /* 主色 */
  --brand: #1a6fb5;
  --brand-dark: #12507f;
  --brand-soft: #e8f2fa;
  --brand-line: #cfe2f3;

  /* 语义色 */
  --ok: #1f8a58;
  --ok-soft: #e7f5ee;
  --warn: #c47f0a;
  --warn-soft: #fdf4e3;
  --risk: #c0392b;
  --risk-soft: #fdecea;
  --teal: #0e7c86;
  --teal-soft: #e4f2f3;
  --purple: #6a4c93;
  --purple-soft: #f0ebf6;
  --gold: #8a6d12;

  /* 中性 */
  --bg: #f6f9fc;
  --panel: #ffffff;
  --panel-2: #fbfdff;
  --border: #e3e6ea;
  --border-strong: #d0d5db;
  --line: #e3e8ef;
  --text: #1b2430;
  --text-2: #5a6672;
  --text-3: #8d97a3;

  /* 形态 */
  --radius: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 12px rgba(16, 24, 40, .05);
  --shadow-lg: 0 8px 28px rgba(16, 24, 40, .12);

  /* 字体 */
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Mono", "Consolas", "SF Mono", Menlo, monospace;

  --topbar-h: 56px;
  --maxw: 1240px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }
img { max-width: 100%; display: block; }
button { cursor: pointer; }
h1, h2, h3, h4 { line-height: 1.35; margin: 0 0 .5em; font-weight: 700; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }

.num { font-variant-numeric: tabular-nums; }
.mono { font-family: var(--mono); }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ============================ 顶栏 ============================ */
.topbar {
  position: sticky; top: 0; z-index: 60;
  height: var(--topbar-h); min-height: var(--topbar-h);
  display: flex; align-items: center; gap: 18px;
  padding: 0 20px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar .brand { display: flex; align-items: center; gap: 9px; flex-shrink: 0; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px; flex-shrink: 0;
  background: linear-gradient(150deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff; font-weight: 800; font-size: 15px;
  display: grid; place-items: center; letter-spacing: -.5px;
}
.brand-txt { display: flex; flex-direction: column; line-height: 1.2; }
.brand-txt b { font-size: 15px; letter-spacing: .2px; }
.brand-txt span { font-size: 11px; color: var(--text-3); }

.mainnav { display: flex; gap: 2px; margin-left: 8px; }
.mainnav a {
  padding: 7px 13px; border-radius: var(--radius-pill);
  font-size: 14px; color: var(--text-2); white-space: nowrap;
  transition: background .16s, color .16s;
}
.mainnav a:hover { background: var(--brand-soft); color: var(--brand-dark); }
.mainnav a.on { background: var(--brand); color: #fff; }
.mainnav a.on:hover { background: var(--brand-dark); color: #fff; }

.top-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 34px; height: 34px; border-radius: 9px; border: 1px solid var(--border);
  background: #fff; color: var(--text-2);
  display: grid; place-items: center; font-size: 15px; transition: .16s;
}
.icon-btn:hover { border-color: var(--brand-line); color: var(--brand); background: var(--brand-soft); }
.nav-toggle { display: none; }

/* 用户信息 chip */
.user-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 12px 4px 4px; border-radius: var(--radius-pill);
  border: 1px solid var(--border); background: #fff; transition: .16s;
}
.user-chip:hover { border-color: var(--brand-line); background: var(--brand-soft); }
.uc-avatar {
  width: 26px; height: 26px; border-radius: 50%; color: #fff;
  display: grid; place-items: center; font-size: 12.5px; font-weight: 700; flex-shrink: 0;
}
.uc-name { font-size: 13px; color: var(--text); font-weight: 600; }
.uc-pts {
  font-size: 11.5px; color: var(--brand-dark); background: var(--brand-soft);
  padding: 1px 8px; border-radius: var(--radius-pill); font-variant-numeric: tabular-nums;
}

/* ============================ 搜索面板 ============================ */
.searchpanel {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(20, 30, 42, .45); backdrop-filter: blur(3px);
  display: none; padding: 8vh 20px 20px;
}
.searchpanel.open { display: block; }
.searchbox {
  max-width: 660px; margin: 0 auto; background: #fff;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  overflow: hidden; max-height: 78vh; display: flex; flex-direction: column;
}
.searchbox input {
  width: 100%; border: 0; padding: 16px 20px; font-size: 16px;
  outline: none; border-bottom: 1px solid var(--border);
}
.searchres { overflow-y: auto; padding: 6px 0; }
.sres {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 10px 20px; cursor: pointer; border-left: 3px solid transparent;
}
.sres:hover, .sres.on { background: var(--brand-soft); border-left-color: var(--brand); }
.sres-k { flex-shrink: 0; font-size: 11px; font-weight: 700; padding: 2px 8px;
  border-radius: 5px; background: var(--brand-soft); color: var(--brand-dark); margin-top: 2px; }
.sres-t { font-size: 14.5px; font-weight: 600; }
.sres-d { font-size: 12.5px; color: var(--text-3); }
.searchempty { padding: 30px 20px; text-align: center; color: var(--text-3); font-size: 14px; }

/* ============================ 页头 ============================ */
.pagehead {
  background: linear-gradient(168deg, #0f2440 0%, #0c1e36 100%);
  color: #fff; padding: 40px 0 38px;
}
.pagehead .wrap { max-width: var(--maxw); }
.pagehead h1 { font-size: 30px; margin-bottom: 8px; letter-spacing: -.3px; }
.pagehead p { color: #b9c6d3; margin: 0; max-width: 720px; font-size: 15px; }
.crumb { font-size: 13px; color: #8fa4b8; margin-bottom: 14px; }
.crumb a { color: #cfe2f3; }
.crumb span { margin: 0 6px; opacity: .55; }

/* ============================ 布局：侧栏 + 内容 ============================ */
.layout { max-width: var(--maxw); margin: 0 auto; padding: 26px 20px 70px; display: grid; grid-template-columns: 232px 1fr; gap: 28px; align-items: start; }
.sidenav { position: sticky; top: calc(var(--topbar-h) + 16px); }
.sidenav h4 {
  font-size: 11px; letter-spacing: 1.4px; text-transform: uppercase;
  color: var(--text-3); margin: 0 0 10px; font-weight: 700;
}
.snavgroup { margin-bottom: 18px; }
.snavgroup > a, .snavtoggle {
  display: flex; align-items: center; gap: 8px; width: 100%; text-align: left;
  padding: 8px 11px; border-radius: var(--radius); font-size: 13.5px;
  color: var(--text); background: none; border: 0; font-weight: 600;
}
.snavtoggle:hover, .snavgroup > a:hover { background: var(--brand-soft); color: var(--brand-dark); }
.snavtoggle .ar { margin-left: auto; font-size: 10px; color: var(--text-3); transition: transform .18s; }
.snavtoggle.open .ar { transform: rotate(90deg); }
.snavchildren { display: none; padding: 4px 0 2px 10px; margin-left: 9px; border-left: 1px solid var(--line); }
.snavchildren.open { display: block; }
.snavchildren a {
  display: block; padding: 6px 11px; border-radius: 8px;
  font-size: 13px; color: var(--text-2);
}
.snavchildren a:hover { background: var(--brand-soft); color: var(--brand-dark); }
.snavchildren a.on { background: var(--brand-soft); color: var(--brand-dark); font-weight: 600; }

/* ============================ 卡片 ============================ */
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
}
.card-pad { padding: 22px 24px; }
.card-hd {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
  padding-bottom: 12px; border-bottom: 1px solid var(--line);
}
.card-hd h3 { margin: 0; font-size: 17px; }
.card-hd .sub { font-size: 12.5px; color: var(--text-3); margin-left: auto; }

.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

/* 模块卡（首页） */
.modcard {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s, border-color .18s;
  display: flex; flex-direction: column; gap: 8px;
}
.modcard:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--brand-line); }
.modcard .ico {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  font-size: 19px; background: var(--brand-soft); color: var(--brand-dark);
}
.modcard h3 { font-size: 16px; margin: 2px 0 0; }
.modcard p { font-size: 13px; color: var(--text-2); margin: 0; }
.modcard .meta { font-size: 12px; color: var(--text-3); margin-top: auto; padding-top: 10px; border-top: 1px dashed var(--line); }

/* 统计条 */
.statrow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px;
}
.stat .v { font-size: 23px; font-weight: 700; color: var(--brand-dark); font-variant-numeric: tabular-nums; line-height: 1.2; }
.stat .k { font-size: 12px; color: var(--text-3); margin-top: 3px; }

/* 徽章 */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11.5px; font-weight: 600; padding: 2px 9px;
  border-radius: var(--radius-pill); background: var(--brand-soft); color: var(--brand-dark);
  white-space: nowrap;
}
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.risk { background: var(--risk-soft); color: var(--risk); }
.badge.teal { background: var(--teal-soft); color: var(--teal); }
.badge.purple { background: var(--purple-soft); color: var(--purple); }
.badge.grey { background: #eef1f4; color: var(--text-2); }

/* 章节标题 */
.sect-hd { display: flex; align-items: flex-end; gap: 12px; margin: 34px 0 16px; }
.sect-hd h2 { margin: 0; font-size: 21px; }
.sect-hd .sub { font-size: 13px; color: var(--text-3); padding-bottom: 3px; }
.sect-hd .more { margin-left: auto; font-size: 13px; padding-bottom: 3px; }

/* ============================ 首页 Hero ============================ */
.hero {
  background: linear-gradient(168deg, #0f2440 0%, #123a5e 55%, #0c1e36 100%);
  color: #fff; padding: 46px 0 44px; position: relative; overflow: hidden;
}
.hero::after {
  content: ''; position: absolute; right: -80px; top: -80px;
  width: 380px; height: 380px; border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 111, 181, .38), transparent 68%);
}
.hero .wrap { position: relative; z-index: 2; }
.hero-inner { display: grid; grid-template-columns: 1.35fr 1fr; gap: 40px; align-items: center; }
.hero h1 { font-size: 32px; line-height: 1.3; margin-bottom: 12px; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; color: #7fc4f5; }
.hero p.lead { color: #c3d3e0; font-size: 15.5px; margin-bottom: 20px; max-width: 560px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.hero-tag {
  font-size: 12.5px; padding: 4px 12px; border-radius: var(--radius-pill);
  background: rgba(127, 196, 245, .14); color: #b8dcf7; border: 1px solid rgba(127, 196, 245, .22);
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 20px; border-radius: var(--radius-pill);
  font-size: 14px; font-weight: 600; border: 1px solid transparent; transition: .16s;
}
.btn-p { background: var(--brand); color: #fff; }
.btn-p:hover { background: var(--brand-dark); color: #fff; }
.btn-g { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .28); }
.btn-g:hover { background: rgba(255, 255, 255, .18); color: #fff; }
.btn-o { background: #fff; color: var(--brand-dark); border-color: var(--border-strong); }
.btn-o:hover { border-color: var(--brand); color: var(--brand-dark); }
.btn-s { padding: 7px 15px; font-size: 13px; }
.btn-full { width: 100%; justify-content: center; }

.hero-card {
  background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius-lg); padding: 22px 24px; backdrop-filter: blur(6px);
}
.hero-card h3 { font-size: 14px; color: #9fc3dd; font-weight: 600; margin-bottom: 14px; letter-spacing: .4px; }
.hc-item { padding: 11px 0; border-bottom: 1px dashed rgba(255, 255, 255, .13); }
.hc-item:last-child { border-bottom: 0; padding-bottom: 0; }
.hc-item:first-of-type { padding-top: 0; }
.hc-k { font-size: 11px; color: #8fb3cd; letter-spacing: .5px; }
.hc-v { font-size: 14px; color: #eaf3fa; font-weight: 600; margin-top: 2px; }
.hc-v span { font-weight: 400; color: #b9c6d3; font-size: 13px; }
.hc-bar { height: 4px; border-radius: 3px; background: rgba(255, 255, 255, .14); margin-top: 8px; overflow: hidden; }
.hc-bar i { display: block; height: 100%; background: linear-gradient(90deg, #4aa3e0, #7fc4f5); border-radius: 3px; }

/* ============================ 知识条目卡 ============================ */
.tcard {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; transition: .16s; display: flex; flex-direction: column; gap: 7px;
}
.tcard:hover { border-color: var(--brand-line); box-shadow: var(--shadow); transform: translateY(-2px); }
.tcard .tc-hd { display: flex; align-items: center; gap: 8px; }
.tcard h4 { margin: 0; font-size: 15px; flex: 1; }
.tcard p { font-size: 13px; color: var(--text-2); margin: 0; }
.tcard .tc-ft { display: flex; gap: 8px; align-items: center; margin-top: auto; padding-top: 8px; }
.tcard .code { font-family: var(--mono); font-size: 11px; color: var(--text-3); }

/* ============================ 目录页 ============================ */
.cat-layout { display: grid; grid-template-columns: 244px 1fr; gap: 24px; align-items: start; }
.cat-filter {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 18px; position: sticky; top: calc(var(--topbar-h) + 16px);
}
.cf-hd { font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--text-3); margin-bottom: 10px; }
.cf-item {
  display: flex; align-items: center; gap: 8px; width: 100%; text-align: left;
  padding: 8px 10px; border-radius: var(--radius); border: 0; background: none;
  font-size: 13.5px; color: var(--text-2); margin-bottom: 2px;
}
.cf-item:hover { background: var(--panel-2); color: var(--text); }
.cf-item.on { background: var(--brand-soft); color: var(--brand-dark); font-weight: 600; }
.cf-item .n { margin-left: auto; font-size: 11.5px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.cf-item.on .n { color: var(--brand); }
.cf-div { height: 1px; background: var(--line); margin: 14px 0; }

.cat-tree { display: flex; flex-direction: column; gap: 22px; }
.cat-group { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.cat-group-hd {
  display: flex; align-items: center; gap: 12px; padding: 16px 20px;
  background: linear-gradient(90deg, var(--brand-soft), transparent);
  border-bottom: 1px solid var(--line); cursor: pointer;
}
.cat-group-hd .gi {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: var(--brand); color: #fff; font-size: 15px; font-weight: 700; flex-shrink: 0;
}
.cat-group-hd h3 { margin: 0; font-size: 16px; }
.cat-group-hd .desc { font-size: 12.5px; color: var(--text-3); margin-top: 1px; }
.cat-group-hd .cnt { margin-left: auto; font-size: 12px; color: var(--text-3); }
.cat-group-hd .ar { color: var(--text-3); font-size: 11px; transition: transform .18s; }
.cat-group.collapsed .ar { transform: rotate(-90deg); }
.cat-group.collapsed .cat-group-bd { display: none; }
.cat-group-bd { padding: 14px 20px 18px; }

.subcat { margin-bottom: 14px; }
.subcat:last-child { margin-bottom: 0; }
.subcat-t {
  font-size: 13px; font-weight: 700; color: var(--text-2); margin-bottom: 9px;
  display: flex; align-items: center; gap: 8px;
}
.subcat-t::before { content: ''; width: 3px; height: 13px; background: var(--brand); border-radius: 2px; }
.tlist { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 10px; }

/* ============================ 详情页 ============================ */
.topic { display: grid; grid-template-columns: 1fr 258px; gap: 28px; align-items: start; }
.topic-body { min-width: 0; }
.toc-side { position: sticky; top: calc(var(--topbar-h) + 16px); }
.toc-box {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 16px 18px;
}
.toc-box h4 { font-size: 12px; letter-spacing: 1px; color: var(--text-3); margin-bottom: 10px; }
.toc-box a {
  display: block; padding: 6px 10px; border-radius: 7px; font-size: 13px;
  color: var(--text-2); border-left: 2px solid transparent;
}
.toc-box a:hover { background: var(--brand-soft); color: var(--brand-dark); }
.toc-box a.on { border-left-color: var(--brand); color: var(--brand-dark); font-weight: 600; background: var(--brand-soft); }

.kv { display: grid; grid-template-columns: 88px 1fr; gap: 8px 14px; font-size: 13.5px; }
.kv dt { color: var(--text-3); font-size: 12.5px; }
.kv dd { margin: 0; }

.sec-block { margin-top: 26px; }
.sec-block > h3 {
  font-size: 16px; display: flex; align-items: center; gap: 8px;
  padding-bottom: 9px; border-bottom: 1px solid var(--line); margin-bottom: 14px;
}
.sec-block > h3 .n {
  width: 22px; height: 22px; border-radius: 6px; background: var(--brand-soft);
  color: var(--brand-dark); font-size: 12px; display: grid; place-items: center; flex-shrink: 0;
}
.formula {
  background: #0f1e30; color: #dceaf6; border-radius: var(--radius);
  padding: 15px 18px; font-family: var(--mono); font-size: 13.5px;
  line-height: 2; overflow-x: auto; margin: 0 0 14px;
}
.formula .hl { color: #7fc4f5; }
.formula .cm { color: #7d94a8; font-size: 12.5px; }
.ex {
  background: var(--panel-2); border: 1px solid var(--line);
  border-left: 3px solid var(--brand); border-radius: var(--radius);
  padding: 14px 18px; margin-bottom: 12px;
}
.ex .t { font-size: 12.5px; font-weight: 700; color: var(--brand-dark); margin-bottom: 8px; letter-spacing: .3px; }
.ex .row { display: flex; gap: 10px; font-size: 13.5px; padding: 4px 0; }
.ex .row .k { color: var(--text-3); min-width: 108px; flex-shrink: 0; }
.ex .row .v { font-weight: 600; font-variant-numeric: tabular-nums; }
.ex .res {
  margin-top: 10px; padding: 9px 13px; background: var(--ok-soft);
  border-radius: 8px; font-size: 13.5px; color: #14663f; font-weight: 600;
}

.callout { border-radius: var(--radius); padding: 13px 17px; font-size: 13.5px; margin-bottom: 12px; border: 1px solid; }
.callout .ct { font-weight: 700; margin-bottom: 4px; display: flex; align-items: center; gap: 6px; }
.co-tip { background: var(--brand-soft); border-color: var(--brand-line); color: #14405f; }
.co-tip .ct { color: var(--brand-dark); }
.co-warn { background: var(--warn-soft); border-color: #f0dcb0; color: #6d4a06; }
.co-warn .ct { color: var(--warn); }
.co-risk { background: var(--risk-soft); border-color: #f2cdc8; color: #7d2619; }
.co-risk .ct { color: var(--risk); }

.steps { counter-reset: s; list-style: none; padding: 0; }
.steps li {
  counter-increment: s; position: relative; padding: 0 0 16px 38px;
  font-size: 14px;
}
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 0;
  width: 24px; height: 24px; border-radius: 7px; background: var(--brand);
  color: #fff; font-size: 12.5px; font-weight: 700; display: grid; place-items: center;
}
.steps li::after {
  content: ''; position: absolute; left: 11px; top: 26px; bottom: 2px;
  width: 2px; background: var(--line);
}
.steps li:last-child { padding-bottom: 0; }
.steps li:last-child::after { display: none; }
.steps b { display: block; margin-bottom: 2px; }
.steps span { color: var(--text-2); font-size: 13px; }

.relgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.relcard {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 13px 15px;
  background: var(--panel); transition: .16s;
}
.relcard:hover { border-color: var(--brand-line); background: var(--panel-2); }
.relcard .rc-t { font-size: 14px; font-weight: 600; margin-bottom: 3px; }
.relcard .rc-d { font-size: 12.5px; color: var(--text-3); }
.relcard .rc-m { font-size: 11px; color: var(--brand); margin-top: 7px; display: inline-block; }

/* ============================ 学习路径 ============================ */
.path { display: flex; flex-direction: column; gap: 0; }
.pathstep { display: grid; grid-template-columns: 128px 1fr; gap: 26px; }
.pathrail { display: flex; flex-direction: column; align-items: center; }
.pathrail .pn {
  width: 46px; height: 46px; border-radius: 13px; background: var(--brand);
  color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 16px;
  box-shadow: 0 4px 14px rgba(26, 111, 181, .3);
}
.pathrail .pl { flex: 1; width: 2px; background: var(--line); margin: 6px 0; min-height: 20px; }
.pathbody { padding-bottom: 30px; }
.pathbody h3 { font-size: 17px; margin-bottom: 4px; display: flex; align-items: center; gap: 10px; }
.pathbody .goal { font-size: 13px; color: var(--text-3); margin-bottom: 12px; }
.pathitems { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 10px; }
.pitem {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 13px 15px;
  background: var(--panel); transition: .16s; display: flex; gap: 10px; align-items: flex-start;
}
.pitem:hover { border-color: var(--brand-line); box-shadow: var(--shadow); }
.pitem .pi {
  width: 28px; height: 28px; border-radius: 8px; background: var(--brand-soft);
  color: var(--brand-dark); display: grid; place-items: center; flex-shrink: 0;
  font-size: 13px; font-weight: 700;
}
.pitem .pt { font-size: 14px; font-weight: 600; }
.pitem .pd { font-size: 12.5px; color: var(--text-3); }

/* ============================ 工具箱 ============================ */
.toolgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 14px; }
.toolcard {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; cursor: pointer; transition: .18s; display: flex; flex-direction: column; gap: 7px;
}
.toolcard:hover { border-color: var(--brand); box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.toolcard .ti {
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  font-size: 17px; background: var(--teal-soft); color: var(--teal);
}
.toolcard h4 { margin: 2px 0 0; font-size: 15px; }
.toolcard p { font-size: 12.5px; color: var(--text-2); margin: 0; }
.toolcard .tf { font-size: 11.5px; color: var(--text-3); margin-top: auto; padding-top: 8px; }

.calc {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 22px 24px; margin-top: 20px;
}
.calc-hd { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.calc-hd h3 { margin: 0; font-size: 17px; }
.formrow { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; margin: 18px 0; }
.field label { display: block; font-size: 12.5px; color: var(--text-2); margin-bottom: 5px; font-weight: 600; }
.field input, .field select {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border-strong);
  border-radius: var(--radius); font-size: 14px; font-family: var(--mono);
  background: #fff; outline: none; transition: .16s;
}
.field input:focus, .field select:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.calc-out {
  background: linear-gradient(150deg, #0f2440, #14395c); color: #fff;
  border-radius: var(--radius); padding: 18px 22px;
}
.calc-out .ot { font-size: 12px; color: #9fc3dd; letter-spacing: .6px; margin-bottom: 10px; }
.calc-out .ov { font-size: 28px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -.5px; }
.calc-out .ov small { font-size: 15px; font-weight: 500; color: #b9c6d3; margin-left: 4px; }
.calc-out .orows { margin-top: 14px; border-top: 1px solid rgba(255, 255, 255, .12); padding-top: 12px; }
.calc-out .orow { display: flex; justify-content: space-between; font-size: 13px; padding: 3px 0; color: #c3d3e0; }
.calc-out .orow b { color: #fff; font-variant-numeric: tabular-nums; font-weight: 600; }
.calc-note { font-size: 12.5px; color: var(--text-3); margin-top: 12px; }

/* ============================ 练习 ============================ */
.quiz-wrap { max-width: 760px; margin: 0 auto; }
.qcard { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px 26px; }
.q-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.q-stem { font-size: 16px; font-weight: 600; line-height: 1.7; margin-bottom: 16px; }
.qopts { display: flex; flex-direction: column; gap: 9px; }
.qopt {
  display: flex; gap: 11px; align-items: flex-start; padding: 12px 15px;
  border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer;
  font-size: 14px; transition: .14s; background: #fff; text-align: left; width: 100%;
}
.qopt:hover { border-color: var(--brand); background: var(--panel-2); }
.qopt .ok {
  width: 22px; height: 22px; border-radius: 6px; background: #eef1f4; color: var(--text-2);
  display: grid; place-items: center; font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.qopt.sel { border-color: var(--brand); background: var(--brand-soft); }
.qopt.sel .ok { background: var(--brand); color: #fff; }
.qopt.right { border-color: var(--ok); background: var(--ok-soft); }
.qopt.right .ok { background: var(--ok); color: #fff; }
.qopt.wrong { border-color: var(--risk); background: var(--risk-soft); }
.qopt.wrong .ok { background: var(--risk); color: #fff; }
.qopt.locked { cursor: default; }
.qexp {
  margin-top: 16px; padding: 14px 17px; border-radius: var(--radius);
  background: var(--panel-2); border: 1px solid var(--line); font-size: 13.5px;
}
.qexp .qt { font-weight: 700; margin-bottom: 5px; color: var(--brand-dark); }
.qbar { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.qprog { flex: 1; height: 6px; background: var(--line); border-radius: 4px; overflow: hidden; }
.qprog i { display: block; height: 100%; background: var(--brand); border-radius: 4px; transition: width .3s; }
.qfoot { display: flex; gap: 12px; justify-content: space-between; margin-top: 20px; }
.qscore { text-align: center; padding: 30px 20px; }
.qscore .sv { font-size: 46px; font-weight: 800; color: var(--brand-dark); font-variant-numeric: tabular-nums; }
.qscore .sk { font-size: 14px; color: var(--text-3); }

/* ============================ 项目看板 ============================ */
.kb-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.proj {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px;
}
.proj .ph { display: flex; align-items: center; gap: 9px; margin-bottom: 8px; }
.proj .ph h4 { margin: 0; font-size: 15px; flex: 1; }
.proj .pc { font-size: 13px; color: var(--text-2); margin-bottom: 10px; }
.proj .pm { display: flex; gap: 14px; font-size: 12px; color: var(--text-3); }
.kanban { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.kcol { background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 14px; }
.kcol h4 {
  font-size: 12.5px; color: var(--text-2); margin-bottom: 11px;
  display: flex; align-items: center; gap: 7px; letter-spacing: .4px;
}
.kcol h4 .dot { width: 8px; height: 8px; border-radius: 50%; }
.kcard2 {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 13px 15px; margin-bottom: 9px; transition: .16s;
}
.kcard2:hover { border-color: var(--brand-line); box-shadow: var(--shadow); }
.kcard2 .kt { font-size: 13.5px; font-weight: 600; margin-bottom: 5px; }
.kcard2 .kd { font-size: 12px; color: var(--text-3); margin-bottom: 8px; }
.kcard2 .kf { display: flex; justify-content: space-between; align-items: center; font-size: 11.5px; color: var(--text-3); }

/* ============================ 模板库 ============================ */
.tpl {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 15px 17px;
  background: var(--panel); display: flex; gap: 12px; align-items: flex-start; transition: .16s;
}
.tpl:hover { border-color: var(--brand-line); box-shadow: var(--shadow); }
.tpl .ti { font-size: 18px; }
.tpl .tt { font-size: 14px; font-weight: 600; margin-bottom: 3px; }
.tpl .td { font-size: 12.5px; color: var(--text-3); }
.tpl .tm { margin-left: auto; text-align: right; white-space: nowrap; }

/* ============================ 页脚 ============================ */
.foot {
  background: #0f1e30; color: #8fa4b8; padding: 40px 0 26px; margin-top: 60px;
}
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.foot h5 { color: #fff; font-size: 13.5px; margin: 0 0 12px; letter-spacing: .4px; }
.foot a { color: #8fa4b8; font-size: 13px; display: block; margin-bottom: 7px; }
.foot a:hover { color: #7fc4f5; }
.foot .fb { border-top: 1px solid rgba(255, 255, 255, .1); margin-top: 28px; padding-top: 16px; font-size: 12px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.foot-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.foot-logo b { color: #fff; font-size: 15px; }
.foot p { font-size: 13px; line-height: 1.8; max-width: 340px; }

/* ============================ 工具类 ============================ */
.mt0 { margin-top: 0; } .mt8 { margin-top: 8px; } .mt12 { margin-top: 12px; }
.mt16 { margin-top: 16px; } .mt20 { margin-top: 20px; } .mt28 { margin-top: 28px; }
.mb0 { margin-bottom: 0; } .mb12 { margin-bottom: 12px; } .mb16 { margin-bottom: 16px; }
.mb24 { margin-bottom: 24px; } .mb32 { margin-bottom: 32px; }
.tc { text-align: center; } .tr { text-align: right; }
.muted { color: var(--text-3); }
.small { font-size: 12.5px; }
.f12 { font-size: 12px; } .f13 { font-size: 13px; } .f14 { font-size: 14px; }
.b6 { font-weight: 600; } .b7 { font-weight: 700; }
.brand-c { color: var(--brand-dark); }
.ok-c { color: var(--ok); } .warn-c { color: var(--warn); } .risk-c { color: var(--risk); }
.hide { display: none !important; }
.spread { display: flex; align-items: center; gap: 12px; }
.spread .end { margin-left: auto; }
.empty { padding: 46px 20px; text-align: center; color: var(--text-3); }
.empty .ei { font-size: 34px; margin-bottom: 8px; opacity: .5; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.tabs::-webkit-scrollbar { height: 0; width: 0; display: none; }
.tab {
  padding: 9px 16px; font-size: 14px; color: var(--text-2); background: none;
  border: 0; border-bottom: 2px solid transparent; white-space: nowrap; margin-bottom: -1px;
}
.tab:hover { color: var(--text); }
.tab.on { color: var(--brand-dark); border-bottom-color: var(--brand); font-weight: 600; }
.chip {
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 12px;
  border-radius: var(--radius-pill); border: 1px solid var(--border); background: #fff;
  font-size: 13px; color: var(--text-2); cursor: pointer; transition: .14s; white-space: nowrap;
}
.chip:hover { border-color: var(--brand); color: var(--brand-dark); }
.chip.on { background: var(--brand); border-color: var(--brand); color: #fff; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

/* ============================ 响应式 ============================ */
@media (max-width: 1080px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr 1fr; }
  .foot-grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 26px; }
  .layout, .cat-layout, .topic { grid-template-columns: 1fr; }
  .sidenav, .cat-filter, .toc-side { position: static; }
  .sidenav { display: none; }
  .cat-filter { position: static; }
  .kanban { grid-template-columns: repeat(2, 1fr); }
  .pathstep { grid-template-columns: 92px 1fr; gap: 16px; }
  .statrow { grid-template-columns: repeat(2, 1fr); }
  .mainnav {
    position: fixed; inset: var(--topbar-h) 0 auto 0; flex-direction: column;
    background: #fff; border-bottom: 1px solid var(--border); padding: 10px 16px 16px;
    gap: 2px; box-shadow: var(--shadow-lg); display: none; z-index: 55;
  }
  .mainnav.open { display: flex; }
  .mainnav a { padding: 11px 14px; border-radius: var(--radius); }
  .nav-toggle { display: grid; }
  .hero h1 { font-size: 25px; }
  .pagehead h1 { font-size: 23px; }
}

@media (max-width: 640px) {
  body { font-size: 14.5px; }
  .wrap, .layout { padding-left: 14px; padding-right: 14px; }
  .topbar { padding: 0 12px; gap: 10px; }
  .brand-txt span { display: none; }
  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .statrow { grid-template-columns: repeat(2, 1fr); }
  .kb-stats { grid-template-columns: repeat(2, 1fr); }
  .kanban { grid-template-columns: 1fr; }
  .tlist { grid-template-columns: 1fr; }
  .hero { padding: 32px 0 30px; }
  .hero h1 { font-size: 22px; }
  .hero p.lead { font-size: 14px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .pathstep { grid-template-columns: 1fr; gap: 8px; }
  .pathrail { flex-direction: row; align-items: center; gap: 10px; }
  .pathrail .pl { width: 40px; height: 2px; min-height: 0; margin: 0; }
  .qcard, .calc, .card-pad { padding: 18px 16px; }
  .formrow { grid-template-columns: 1fr; }
  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dt { margin-top: 8px; }
  .sect-hd { flex-wrap: wrap; }
  .sect-hd .more { margin-left: 0; width: 100%; }
}

@media print {
  .topbar, .foot, .sidenav, .toc-side, .searchpanel { display: none !important; }
  body { background: #fff; }
}