/* ===================================================
   style-yuncai5.css — 会计税务知识库 视觉系统（v3 重做）
   设计语言：Minimalism / Swiss — 中性灰 + 单一品牌蓝
   加载顺序：Bootstrap → yuncai5/main.css → style.css → 本文件（最后加载，可覆盖）
   =================================================== */

:root {
  --brand:      #1f5fd6;
  --brand-700:  #1747a8;
  --brand-50:   #eef4ff;
  --brand-100:  #dbe7ff;
  --ink:        #1e293b;
  --ink-2:      #475569;
  --muted:      #64748b;
  --bg:         #f8fafc;
  --surface:    #ffffff;
  --surface-2:  #fbfcfe;
  --border:     #e2e8f0;
  --border-2:   #eef2f7;
  --radius:     14px;
  --shadow-sm:  0 1px 3px rgba(15,23,42,.05);
  --shadow-md:  0 6px 20px rgba(15,23,42,.08);
  --shadow-lg:  0 14px 40px rgba(15,23,42,.10);
  --font: "PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

/* ---------- 0. 全局 ---------- */
html, body {
  background: var(--bg);
  color: var(--ink-2);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
* { box-sizing: border-box; }

/* ---------- 1. 顶部导航栏（重肤 yuncai5：去橙色，统一品牌蓝） ---------- */
#header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(15,23,42,.06);
}
#header .navbar { background: #fff !important; padding: 10px 0; }

/* 导航链接：去橙色，改品牌蓝 */
.navbar-inverse .navbar-nav > li > a {
  color: var(--ink-2) !important;
  font-size: 15px;
  border-radius: 8px;
  transition: background-color .18s ease, color .18s ease;
}
.navbar-inverse .navbar-nav > li > a:hover,
.navbar-inverse .navbar-nav > .active > a,
.navbar-inverse .navbar-nav > .active > a:hover,
.navbar-inverse .navbar-nav > .active > a:focus,
.navbar-inverse .navbar-nav > .open > a,
.navbar-inverse .navbar-nav > .open > a:hover,
.navbar-inverse .navbar-nav > .open > a:focus {
  background-color: var(--brand-50) !important;
  color: var(--brand-700) !important;
}
/* 下拉菜单：黑底 → 白底品牌化 */
.navbar-inverse .navbar-nav .dropdown-menu {
  background: #fff !important;
  border: 1px solid var(--border) !important;
  border-radius: 12px !important;
  box-shadow: var(--shadow-md) !important;
  padding: 6px 0 !important;
  margin-top: 0 !important;
}
.navbar-inverse .navbar-nav .dropdown-menu > li > a {
  color: var(--ink-2) !important;
  padding: 8px 16px !important;
}
.navbar-inverse .navbar-nav .dropdown-menu > li:hover > a,
.navbar-inverse .navbar-nav .dropdown-menu > li:focus > a,
.navbar-inverse .navbar-nav .dropdown-menu > li.active > a {
  background: var(--brand-50) !important;
  color: var(--brand-700) !important;
}

/* 修复：下拉菜单在鼠标移向选项前自动收起
   原因：菜单 margin-top 形成的命中死区 + responsive.css 的 fadeInUp(位移) 动画让
   命中区与可见区错位。去掉位移动画并把菜单与触发区无缝衔接（li 自带 28px 内边距作悬停桥）。 */
@media (min-width: 768px) {
  .navbar-nav .dropdown:hover .dropdown-menu,
  .navbar-nav .dropdown .dropdown-menu:hover {
    display: block !important;
    -webkit-animation: none !important;
    animation: none !important;
  }
}
/* 下拉项键盘可达性 */
.navbar-inverse .navbar-nav .dropdown-menu > li > a:focus-visible {
  outline: 2px solid var(--brand-700);
  outline-offset: -2px;
}

.navbar-inverse .navbar-brand { color: var(--ink) !important; }

/* ---------- 2. 知识库目录条（7 大板块，单一蓝色强调带） ---------- */
.kb-subnav {
  background: var(--brand);
  position: relative;
  z-index: 999;
  box-shadow: 0 4px 14px rgba(15,23,42,.16);
}
.kb-subnav .container { padding-left: 0; padding-right: 0; }
.kb-subnav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
}
.kb-subnav-list a {
  display: block;
  color: #fff;
  padding: 13px 22px;
  font-size: 15px;
  line-height: 1.2;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  transition: background-color .18s ease, border-color .18s ease;
  -webkit-tap-highlight-color: transparent;
}
.kb-subnav-list a:hover { background: var(--brand-700); text-decoration: none; }
.kb-subnav-list a:focus-visible { outline: 2px solid #fff; outline-offset: -2px; }
.kb-subnav-list a.active {
  background: var(--brand-700);
  border-bottom-color: #fff;
  font-weight: 600;
}

/* ---------- 2b. 滚动后悬浮的板块快捷导航（侧边垂直） ---------- */
.kb-floatnav {
  position: fixed;
  left: 10px;
  top: 50%;
  transform: translateY(-50%) translateX(-18px);
  z-index: 1040;
  background: #fff;
  border: 1px solid var(--border);
  border-left: 3px solid var(--brand);
  border-radius: 12px;
  padding: 8px 6px;
  box-shadow: 0 10px 28px rgba(15,23,42,.16);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
}
.kb-floatnav.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
  pointer-events: auto;
}
.kb-floatnav-title {
  display: block;
  text-align: center;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--muted);
  padding: 2px 4px 6px;
}
.kb-floatnav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.kb-floatnav a {
  display: block;
  min-width: 66px;
  padding: 7px 10px;
  font-size: 13px;
  line-height: 1.2;
  text-align: center;
  color: var(--ink-2);
  text-decoration: none;
  border-radius: 7px;
  white-space: nowrap;
  transition: background-color .16s ease, color .16s ease;
  -webkit-tap-highlight-color: transparent;
}
.kb-floatnav a:hover { background: var(--brand-50); color: var(--brand-700); text-decoration: none; }
.kb-floatnav a:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.kb-floatnav a.active { background: var(--brand); color: #fff; font-weight: 600; }
@media (prefers-reduced-motion: reduce) {
  .kb-floatnav { transition: none; }
}
/* 窄屏：缩窄贴边，避免遮挡正文 */
@media (max-width: 1199px) {
  .kb-floatnav { left: 6px; padding: 6px 4px; }
  .kb-floatnav a { min-width: 56px; padding: 6px 7px; font-size: 12px; }
}
/* 移动端（侧栏已堆叠于正文下方，已有板块导航）隐藏悬浮条 */
@media (max-width: 991px) {
  .kb-floatnav { display: none !important; }
}

/* ---------- 3. 首页 Hero（轻盈浅色，Swiss 留白） ---------- */
.kb-hero {
  position: relative;
  background:
    radial-gradient(120% 150% at 8% -15%, rgba(31,95,214,.12), transparent 55%),
    radial-gradient(120% 150% at 102% -5%, rgba(23,71,168,.08), transparent 50%),
    var(--bg);
  color: var(--ink);
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--border);
}
.kb-hero::after { display: none; } /* 移除旧版金色签名条 */
.kb-hero h1 {
  margin: 0 0 12px;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.2;
  color: var(--ink);
  text-wrap: balance;
}
.kb-hero .sub {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.7;
  max-width: 640px;
}
/* hero 搜索框 */
.hero-search {
  display: flex;
  gap: 10px;
  max-width: 660px;
}
.hero-search input {
  flex: 1;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 15.5px;
  color: var(--ink);
  background: #fff;
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: border-color .18s ease, box-shadow .18s ease;
}
.hero-search input::placeholder { color: #94a3b8; }
.hero-search input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(31,95,214,.14);
}
.hero-search button {
  padding: 0 26px;
  border: 0;
  border-radius: 12px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 15.5px;
  cursor: pointer;
  transition: background-color .18s ease, transform .18s ease;
}
.hero-search button:hover { background: var(--brand-700); }
.hero-search button:active { transform: translateY(1px); }
.hero-search button:focus-visible { outline: 2px solid var(--brand-700); outline-offset: 2px; }
/* hero 板块快捷入口（旧版白底贴在浅色上不可见 → 改为品牌浅蓝胶囊） */
.kb-hero-nav { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; }
.kb-hero-nav a {
  display: inline-block;
  padding: 7px 15px;
  background: var(--brand-50);
  color: var(--brand-700);
  border-radius: 999px;
  font-size: 13.5px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color .18s ease, border-color .18s ease;
}
.kb-hero-nav a:hover { background: var(--brand-100); text-decoration: none; }

/* ---------- 4. 主内容容器 ---------- */
.kb-container {
  background: var(--bg);
  padding-top: 30px;
  padding-bottom: 34px;
  min-height: 55vh;
}
.kb-breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 16px;
  letter-spacing: .01em;
}
.kb-breadcrumb a { color: var(--ink-2); text-decoration: none; }
.kb-breadcrumb a:hover { color: var(--brand); }

/* 返回按钮（详情页顶部左侧） */
.kb-back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 0 0 14px;
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--brand);
  background: var(--brand-50);
  border: 1px solid transparent;
  border-radius: 8px;
  text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.kb-back-link:hover {
  color: var(--brand-700);
  background: #fff;
  border-color: var(--brand);
  text-decoration: none;
}
.kb-back-link:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}
.kb-back-link span[aria-hidden="true"] {
  font-weight: 700;
  margin-right: 2px;
}

/* ---------- 5. 内容面板（文章 / 全宽） ---------- */
.kb-article,
.kb-full {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 36px;
  box-shadow: var(--shadow-sm);
}
.kb-article > h1:first-child,
.kb-full > h1:first-child { margin-top: 0; }

/* 字号梯度（清晰 rhythm） */
.kb-article h1,
.kb-full h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.25;
  margin: 0 0 18px;
  color: var(--ink);
  text-wrap: balance;
  scroll-margin-top: 120px;
}
.kb-article h2,
.kb-full h2 {
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  margin: 32px 0 14px;
  padding-left: 14px;
  position: relative;
  text-wrap: balance;
  scroll-margin-top: 120px;
}
.kb-article h2::before,
.kb-full h2::before {
  content: "";
  position: absolute;
  left: 0; top: 3px; bottom: 3px;
  width: 4px;
  border-radius: 4px;
  background: var(--brand);
}
.kb-article h3,
.kb-full h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin: 20px 0 9px;
  text-wrap: pretty;
  scroll-margin-top: 120px;
}
.kb-article p,
.kb-article li,
.kb-full p,
.kb-full li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}
.kb-article .lead,
.kb-full .lead { color: var(--muted); font-size: 15.5px; }

/* ---------- 6. 右侧边栏面板（后退一层，让主内容前凸） ---------- */
.kb-sidebar .panel {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 18px;
}
.kb-sidebar .panel h3 {
  margin: 0 0 10px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--brand-700);
}
.kb-sidebar ul.rel { list-style: none; margin: 0; padding: 0; }
.kb-sidebar ul.rel li {
  padding: 7px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.kb-sidebar ul.rel li:last-child { border-bottom: 0; }
.kb-sidebar ul.rel li a { color: var(--ink-2); text-decoration: none; }
.kb-sidebar ul.rel li a:hover { color: var(--brand); }

/* ---------- 7. 板块网格卡片 ---------- */
.sec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 18px;
  margin-top: 16px;
}
.sec-card {
  position: relative;
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--brand);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.sec-card:hover {
  border-color: var(--brand);
  border-top-color: var(--brand-700);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  transform: translateY(-3px);
}
.sec-card h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
}
.sec-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.65;
}
/* hover 时右下角出现引导箭头 */
.sec-card::after {
  content: "→";
  position: absolute;
  right: 18px;
  bottom: 16px;
  font-size: 18px;
  color: var(--brand);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity .18s ease, transform .18s ease;
}
.sec-card:hover::after { opacity: 1; transform: translateX(0); }

/* ---------- 8. 卡片列表 ---------- */
.cardlist { list-style: none; margin: 0; padding: 0; }
.cardlist li {
  padding: 12px 4px;
  border-bottom: 1px solid var(--border-2);
}
.cardlist li a {
  display: block;
  font-size: 15px;
  color: var(--brand);
  text-decoration: none;
  transition: color .15s ease, transform .15s ease;
}
.cardlist li a:hover { color: var(--brand-700); transform: translateX(3px); }
.cardlist li .cat {
  display: inline-block;
  background: var(--brand-50);
  color: var(--brand-700);
  font-size: 12px;
  padding: 1px 9px;
  border-radius: 999px;
  margin-right: 8px;
  font-variant-numeric: tabular-nums;
}

/* ---------- 9. 分页器 ---------- */
.pager-row {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
  flex-wrap: wrap;
}
.pager-row button {
  padding: 9px 18px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}
.pager-row button:hover:not(:disabled) {
  background: var(--brand-50);
  border-color: var(--brand);
  color: var(--brand-700);
}
.pager-row button:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.pager-row button:disabled { opacity: .45; cursor: not-allowed; }
.pager-row .pginfo { color: var(--muted); font-size: 14px; font-variant-numeric: tabular-nums; }
.pager-row .pgjump { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 14px; font-variant-numeric: tabular-nums; }
.pager-row .pg-input {
  width: 64px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; color: var(--ink); text-align: center; background: #fff;
  -moz-appearance: textfield;
}
.pager-row .pg-input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(31,95,214,.14); }
.pager-row .pg-input::-webkit-outer-spin-button, .pager-row .pg-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.pager-row .pg-go {
  padding: 8px 14px; border: 1px solid var(--brand); background: var(--brand); color: #fff;
  border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 14px;
  transition: background-color .15s ease, border-color .15s ease;
}
.pager-row .pg-go:hover { background: var(--brand-700); border-color: var(--brand-700); }
.pager-row .pg-go:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.pager-row .pgsize { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 14px; }
.pager-row .pg-size { width: auto; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--ink); font-size: 14px; cursor: pointer; }
.pager-row .pg-size:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(31,95,214,.14); }

/* ---------- 10. 搜索页筛选分段 ---------- */
.filterbar { margin: 14px 0 18px; }
.filterbar .search {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 15px;
  color: var(--ink);
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: border-color .18s ease, box-shadow .18s ease;
}
.filterbar .search:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(31,95,214,.14);
}
.seg { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 18px; }
.seg button {
  padding: 8px 15px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--ink-2);
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.seg button:hover:not(.active) { background: var(--brand-50); border-color: var(--brand); color: var(--brand-700); }
.seg button:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.seg button.active { background: var(--brand); color: #fff; border-color: var(--brand); }

/* ---------- 11. 上下页导航 ---------- */
.kb-pagenav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.kb-pagenav .pn {
  padding: 12px 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
  transition: border-color .15s ease, color .15s ease, background-color .15s ease;
  /* 标题动态获取可能较长：限制宽度 + 自动换行 + 截断省略 */
  max-width: 48%;
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.45;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex: 1 1 auto;
}
.kb-pagenav .pn:hover { text-decoration: none; border-color: var(--brand); color: var(--brand-700); background: var(--brand-50); }
.kb-pagenav .pn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.kb-pagenav .pn.disabled { opacity: .45; pointer-events: none; }

/* ---------- 12. 内容排版组件（示例/法规/来源/提示） ---------- */
.kb-article .example,
.kb-full .example {
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 16px 0;
}
.kb-article .ex-q { margin: 0 0 6px; font-weight: 700; color: var(--ink); }
.kb-article .ex-opt { margin: 0 0 8px; color: var(--ink-2); }
.kb-article .ex-a { margin: 0 0 4px; color: #0a7d33; font-weight: 700; }
.kb-article .ex-x { margin: 0; color: var(--ink-2); }

.kb-article .note,
.kb-full .note,
.kb-disclaimer {
  margin-top: 26px;
  padding: 13px 16px;
  background: #fff8e6;
  border: 1px solid #ffe2a8;
  border-radius: 12px;
  font-size: 13px;
  color: #7a5b00;
}
.kb-article .source-box,
.kb-full .source-box {
  margin: 16px 0;
  padding: 13px 16px;
  background: var(--surface-2);
  border-left: 4px solid var(--brand);
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}
.kb-article .source-box .src-label,
.kb-full .source-box .src-label {
  display: inline-block;
  font-weight: 800;
  color: var(--brand-700);
  margin-right: 8px;
  font-size: 13px;
  letter-spacing: .5px;
}
.kb-article .law,
.kb-full .law {
  background: #f6f8fa;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 14px 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.7;
  color: #334155;
}

/* ---------- 13. 底部产品导航区（重肤：浅色 + 品牌蓝链接） ---------- */
#bottom {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 36px 0;
}
#bottom h3,
#bottom .widget-title {
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 14px;
}
#bottom ul { list-style: none; margin: 0; padding: 0; }
#bottom ul li { padding: 5px 0; font-size: 14px; }
#bottom a { color: var(--ink-2); text-decoration: none; }
#bottom a:hover { color: var(--brand); }

/* ---------- 14. 版权区（重肤：品牌深蓝 + 蓝色悬停，去橙） ---------- */
#footer {
  background: #0e2f6e !important;
  color: #cbd9f0;
  padding-top: 28px !important;
  padding-bottom: 28px !important;
}
#footer a { color: #cbd9f0; text-decoration: none; }
#footer a:hover { color: #9bb8ff !important; }
#footer ul > li { margin-left: 14px; }

/* ---------- 15. 通用辅助 ---------- */
.muted { color: var(--muted); }
.kb-full h1, .kb-full h2 { scroll-margin-top: 120px; }

/* ---------- 16. skip-link（无障碍） ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 6px;
  z-index: 1100;
  padding: 8px 16px;
  background: var(--brand);
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
}
.skip-link:focus { left: 10px; }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 767px) {
  .kb-hero h1 { font-size: 26px; }
  .kb-hero { padding: 44px 0 38px; }
  .kb-article, .kb-full { padding: 22px 20px; }
  /* 首屏搜索：手机端改为“输入框 + 蓝按钮并排”的干净药丸 */
  .hero-search { gap: 0; max-width: 100%; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm); }
  .hero-search input { border: 0; border-radius: 0; box-shadow: none; }
  .hero-search button { flex: 0 0 auto; padding: 0 22px; min-height: 50px; border-radius: 0; font-size: 16px; }
  /* 目录条窄屏横向滚动 */
  .kb-subnav .container { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .kb-subnav-list { flex-wrap: nowrap; }
  .kb-subnav-list a { padding: 12px 18px; font-size: 14px; }
}

/* ---------- 18. 尊重系统“减少动效” ---------- */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .sec-card:hover { transform: none; }
}

/* ---------- 19. 顶部导航下拉箭头（纯 CSS 三角，兼容缺失的 Font Awesome 字体） ---------- */
/* 站点未内置 fontawesome-webfont 字体文件，原 <i class="fa fa-angle-down"> 无法渲染，
   这里用纯 CSS 三角形绘制下拉箭头，无需字体，离线可用。 */
.navbar-nav .dropdown-toggle .fa-angle-down {
  font-family: inherit;              /* 不再依赖 FontAwesome 字体 */
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 6px;
  vertical-align: middle;
  line-height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;/* 跟随文字颜色 */
  transition: transform .2s ease;
}
/* 屏蔽字体图标的占位字符（\f107），避免出现空白方块 */
.navbar-nav .dropdown-toggle .fa-angle-down::before {
  content: "";
  display: none;
}
/* 悬停/展开时箭头翻转，增强可用性 */
.navbar-nav .dropdown:hover .dropdown-toggle .fa-angle-down,
.navbar-nav .dropdown.open .dropdown-toggle .fa-angle-down {
  transform: rotate(180deg);
}

/* 法规依据链接：指向本站法规库 */
a.lawlink {
  color: #1f5fd6;
  text-decoration: none;
  border-bottom: 1px dashed #1f5fd6;
  cursor: pointer;
}
a.lawlink:hover,
a.lawlink:focus {
  color: #143f8f;
  border-bottom-style: solid;
}

/* ===================================================
   20. 移动端优化（ui-ux-pro-max）
   触控目标 >=44px、正文 >=16px、卡片化列表、横滑目录、
   表格横滚、安全区（safe-area）、固定底栏（bottom nav）。
   所有规则限定在 @media 内或默认隐藏，不影响桌面布局。
   =================================================== */

/* 全局增强（对所有设备无害）：消除点击延迟、防误触刷新、去点击高亮 */
html { -webkit-text-size-adjust: 100%; touch-action: manipulation; }
body { overscroll-behavior-y: contain; }
a, button, input, select, textarea { -webkit-tap-highlight-color: transparent; }

/* 手机底栏 / 顶栏 / 下拉菜单：桌面默认隐藏 */
.kb-mobilenav, .kb-mobile-header, .kb-mobile-menu { display: none; }

@media (max-width: 767px) {
  /* 顶部商业导航替换为知识库自有简洁顶栏（.kb-mobile-header 由 JS 注入）；隐藏 yuncai5 原 header 以免双重品牌 */
  #header { display: none !important; }

  /* 知识库移动端顶栏：白底、品牌蓝 wordmark、右侧菜单，sticky 吸顶 + 安全区 */
  .kb-mobile-header {
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 1060;
    height: 52px; padding: 0 12px;
    padding-top: env(safe-area-inset-top, 0px);
    background: #fff; border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 10px rgba(15,23,42,.06);
  }
  .kb-mobile-header .brand {
    display: flex; align-items: center; gap: 8px;
    color: var(--brand-700); font-weight: 800; font-size: 18px; letter-spacing: .5px;
    text-decoration: none; -webkit-tap-highlight-color: transparent;
  }
  .kb-mobile-header .brand .dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--brand); box-shadow: 0 0 0 4px var(--brand-50);
  }
  .kb-mobile-header .menu-btn {
    display: flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; margin-right: -8px;
    background: transparent; border: 0; color: var(--fg); cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }
  .kb-mobile-header .menu-btn svg { width: 24px; height: 24px; display: block; }
  .kb-mobile-header .menu-btn:active { background: var(--brand-50); border-radius: 10px; }

  /* 移动端下拉菜单面板（由 hamburger 切换，列出全部板块） */
  .kb-mobile-menu {
    position: fixed; top: calc(52px + env(safe-area-inset-top, 0px)); left: 0; right: 0; z-index: 1059;
    background: #fff; border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 20px rgba(15,23,42,.12);
    padding: 8px 10px 14px;
  }
  .kb-mobile-menu.open { display: block; }
  .kb-mobile-menu a {
    display: flex; align-items: center; min-height: 48px; padding: 0 14px;
    color: var(--fg); text-decoration: none; font-size: 16px; border-radius: 10px;
    -webkit-tap-highlight-color: transparent;
  }
  .kb-mobile-menu a:active { background: var(--brand-50); color: var(--brand-700); }
  .kb-mobile-menu a.active { color: var(--brand-700); font-weight: 700; background: var(--brand-50); }

  /* 主内容容器：为底部固定栏留出空间 + 适配刘海屏 */
  body { padding-bottom: calc(58px + env(safe-area-inset-bottom, 0px)); }
  .kb-container { padding-top: 18px; padding-bottom: 20px; }

  /* 目录条：横向滑动 + 吸附 + 隐藏滚动条 + 触控目标 >=44px */
  .kb-subnav .container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
  }
  .kb-subnav .container::-webkit-scrollbar { display: none; }
  .kb-subnav-list { flex-wrap: nowrap; }
  .kb-subnav-list a {
    min-height: 44px;
    padding: 12px 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    scroll-snap-align: start;
  }

  /* 文章正文：字号 >=16px、舒适行距、圆角收窄 */
  .kb-article, .kb-full { padding: 20px 16px; border-radius: 12px; }
  .kb-article > h1:first-child, .kb-full > h1:first-child { margin-top: 0; }
  .kb-article h1, .kb-full h1 { font-size: 23px; }
  .kb-article h2, .kb-full h2 { font-size: 19px; padding-left: 12px; margin: 24px 0 12px; }
  .kb-article h3, .kb-full h3 { font-size: 16px; }
  .kb-article p, .kb-article li, .kb-full p, .kb-full li { font-size: 16px; line-height: 1.75; }
  .kb-article .law, .kb-full .law,
  .kb-article .example, .kb-full .example,
  .kb-article .note, .kb-full .note, .kb-disclaimer,
  .kb-article .source-box, .kb-full .source-box { margin-left: 0; margin-right: 0; }
  /* 表格横向滚动，避免撑破视口 */
  .kb-article table, .kb-full table {
    display: block; width: 100%;
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    border-collapse: collapse;
  }

  /* 返回按钮：触控友好 */
  .kb-back-link { min-height: 40px; padding: 8px 14px; font-size: 14px; }

  /* 上/下页导航：全宽堆叠，大点按区 */
  .kb-pagenav { gap: 10px; }
  .kb-pagenav .pn {
    max-width: 100%; flex: 1 1 100%; justify-content: center;
    min-height: 48px; padding: 13px 16px; font-size: 15px;
  }

  /* 卡片列表：卡片化 + 触控目标 48px + 按压反馈（手机无 hover） */
  .cardlist li { padding: 0; border-bottom: 1px solid var(--border-2); }
  .cardlist li a {
    display: flex; align-items: center;
    min-height: 48px; padding: 12px 14px; margin: 6px 0;
    background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
    transition: background-color .15s ease, border-color .15s ease;
  }
  .cardlist li a:hover { transform: none; background: var(--brand-50); border-color: var(--brand); color: var(--brand-700); }
  .cardlist li a:active { background: var(--brand-100); }

  /* 分页器按钮：触控目标 44px */
  .pager-row { gap: 8px; margin-top: 20px; }
  .pager-row button, .pager-row .pg-go { min-height: 44px; padding: 10px 18px; }
  .pager-row .pg-input { min-height: 44px; width: 72px; }

  /* 首页板块卡片：单列 + 按压反馈 */
  .sec-grid { grid-template-columns: 1fr; gap: 14px; }
  .sec-card { padding: 18px 18px; }
  .sec-card::after { display: none; }
  .sec-card:active { transform: translateY(-1px); box-shadow: var(--shadow-sm); }

  /* 首屏搜索按钮：大点按区 */
  .hero-search button { min-height: 48px; padding: 14px 0; font-size: 16px; }

  /* 底部固定导航（bottom nav，<=5 项，触控 >=44px） */
  .kb-mobilenav {
    display: flex;
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 1050;
    background: rgba(255,255,255,.96);
    -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 18px rgba(15,23,42,.10);
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  .kb-mobilenav a {
    flex: 1; min-height: 52px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 3px; padding: 7px 2px 8px;
    color: var(--muted); text-decoration: none; font-size: 11px; line-height: 1.1;
    -webkit-tap-highlight-color: transparent;
    transition: color .15s ease;
  }
  .kb-mobilenav a svg { width: 22px; height: 22px; display: block; }
  .kb-mobilenav a:active, .kb-mobilenav a.active { color: var(--brand); }
}

@media (max-width: 480px) {
  .kb-hero h1 { font-size: 23px; }
  .kb-hero .sub { font-size: 15px; }
  .kb-article, .kb-full { padding: 18px 13px; }
  .kb-article h1, .kb-full h1 { font-size: 21px; }
  .kb-article p, .kb-article li, .kb-full p, .kb-full li { font-size: 15.5px; }
  .kb-article h2, .kb-full h2 { font-size: 18px; }
  .sec-card h3 { font-size: 17px; }
  .kb-mobilenav a { font-size: 10.5px; }
  .kb-mobilenav a svg { width: 20px; height: 20px; }
}

/* ===== 法规库层级大纲: 父子级编号(条文释义 / 实务影响分析) ===== */
.kb-ol1, .kb-ol2, .kb-olc { list-style: none; margin: 0; padding: 0; }
.kb-ol1 { margin: .5em 0 1.1em; }
.kb-ol1 > li { position: relative; margin: .6em 0; }
.kb-onum { font-weight: 700; color: #1f3b6e; margin-right: .35em; white-space: nowrap; }
.kb-ol1 > li > p { margin: .25em 0 .1em; padding-left: 1.7em; }
.kb-ol2, .kb-olc { margin: .35em 0 .2em; padding-left: 1.7em; }
.kb-ol2 > li, .kb-olc > li { margin: .32em 0; line-height: 1.75; }
.kb-ol2 { counter-reset: ol2; }
/* 风险点(实务影响分析) */
.kb-ol-risk > li.kb-risk {
  border-left: 3px solid #c0392b;
  background: #fdf4f2;
  padding: .55em .9em;
  border-radius: 0 6px 6px 0;
  margin: .7em 0;
}
.kb-ol-risk > li.kb-risk > .kb-onum { color: #c0392b; display: block; margin: 0 0 .2em; }
.kb-ol-risk > li.kb-risk > .kb-onum::after { content: ""; }
.kb-ol-risk > li.kb-risk > p { padding-left: 1.4em; }
.kb-ol-risk .kb-olc { padding-left: 1.4em; }
/* 二层风险点(实务影响分析 · 风险点, 嵌套于(三)内) */
.kb-ol2-risk { list-style: none; margin: .35em 0 .2em; padding: 0; }
.kb-ol2-risk > li.kb-risk {
  border-left: 3px solid #c0392b;
  background: #fdf4f2;
  padding: .45em .8em;
  border-radius: 0 5px 5px 0;
  margin: .55em 0;
}
.kb-ol2-risk > li.kb-risk > .kb-onum { color: #c0392b; display: block; margin: 0 0 .15em; font-weight: 700; }
.kb-ol2-risk > li.kb-risk > p { padding-left: 1.2em; }
.kb-ol2-risk .kb-olc { padding-left: 1.2em; }
.kb-ol2-risk .kb-olc > li { margin: .28em 0; line-height: 1.7; }