/*!
 * kb-md-theme.css —— 知识库 Markdown 视觉主题（管理端编辑器 / 对外阅读页共用）
 *
 * 作用：在 kb-md.js 渲染出的结构上做「UI 设计」升级，让 AI 排版 / 图文美化的结果好看、有层次、有特效。
 * 约定：全部规则以 .kb-md 作用域开头，装饰性属性为主，不改变文档结构与交互逻辑。
 *   —— 引入顺序必须在各页面自身样式之后（后加载覆盖），两个页面共用这一份，改一处两处同步生效。
 *   —— 视觉块（```kpi / ```cards / ```steps / ```timeline）的样式也在这里，渲染由 kb-md.js 负责。
 *   —— 动效尊重系统「减弱动态效果」设置（prefers-reduced-motion）。
 */

/* ============================ 设计变量 ============================ */
.kb-md {
  --kb-brand: #4B6EF5;
  --kb-brand-2: #6aa2ff;
  --kb-ink: #1f2b45;
  --kb-ink-2: #41506e;
  --kb-sub: #7b869e;
  --kb-line: #e4eaf6;
  --kb-line-2: #eef2f9;
  --kb-soft: #f7f9ff;
  --kb-r: 14px;
  --kb-shadow: 0 10px 26px -18px rgba(31, 43, 69, .55);
  --kb-shadow-hover: 0 16px 30px -18px rgba(75, 110, 245, .45);
  font-size: 14px;
  line-height: 1.85;
  color: var(--kb-ink);
}

/* ============================ 标题层级 ============================ */
.kb-md h1 {
  position: relative;
  font-size: 23px;
  font-weight: 700;
  line-height: 1.45;
  margin: 4px 0 16px;
  padding-bottom: 11px;
  border-bottom: 0;
  letter-spacing: .2px;
}
.kb-md h1::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 68px; height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, #4B6EF5, #6aa2ff 60%, rgba(106, 162, 255, 0));
}
.kb-md h2 {
  position: relative;
  font-size: 18.5px;
  font-weight: 700;
  margin: 24px 0 10px;
  padding-left: 12px;
}
.kb-md h2::before {
  content: '';
  position: absolute;
  left: 0; top: 5px; bottom: 5px;
  width: 4px;
  border-radius: 3px;
  background: linear-gradient(180deg, #4B6EF5, #7fb0ff);
}
.kb-md h3 { font-size: 16px; font-weight: 700; margin: 19px 0 8px; }
.kb-md h4 { font-size: 14.5px; font-weight: 700; margin: 16px 0 7px; color: var(--kb-ink-2); }
.kb-md h5, .kb-md h6 { font-size: 13.5px; font-weight: 700; margin: 14px 0 6px; color: var(--kb-ink-2); }
.kb-md p { margin: 10px 0; }
.kb-md strong { color: #12203d; }
.kb-md em { color: var(--kb-ink-2); }

/* ============================ 行内元素 ============================ */
.kb-md a {
  color: var(--kb-brand);
  text-decoration: none;
  border-bottom: 1px solid #cddcff;
  transition: color .16s, border-color .16s, background-color .16s;
}
.kb-md a:hover { color: #1f4bb8; border-bottom-color: #4B6EF5; background: #f2f7ff; }
.kb-md mark {
  padding: 1px 5px;
  border-radius: 5px;
  background: linear-gradient(180deg, transparent 56%, #ffe27a 56%);
  color: inherit;
  font-weight: 600;
}
.kb-md del { color: #98a2b8; }
.kb-md p code, .kb-md li code, .kb-md td code, .kb-md th code, .kb-md .kb-callout-body code {
  padding: 1.5px 6px;
  border-radius: 6px;
  background: #eef3ff;
  border: 1px solid #e0e9fb;
  color: #b3266a;
  font-size: 12.5px;
  font-family: Consolas, Monaco, 'Courier New', monospace;
}
.kb-md sup, .kb-md sub { font-size: 11.5px; }
.kb-md hr {
  border: 0;
  height: 1px;
  margin: 22px 0;
  background: linear-gradient(90deg, rgba(75, 110, 245, 0), #cddcff 18%, #cddcff 82%, rgba(75, 110, 245, 0));
}
.kb-md blockquote {
  margin: 14px 0;
  padding: 9px 15px;
  border-left: 3px solid #cfdcf6;
  border-radius: 0 10px 10px 0;
  background: linear-gradient(90deg, #f4f8ff, #fbfdff);
  color: #4c5a76;
}
.kb-md blockquote p { margin: 4px 0; }

/* 列表：层级更清楚 */
.kb-md ul, .kb-md ol { margin: 9px 0; padding-left: 24px; }
.kb-md li { margin: 4px 0; }
.kb-md li::marker { color: #9fb4dd; }
.kb-md ul.kb-task-list { list-style: none; padding-left: 4px; }
.kb-md .kb-task { display: flex; align-items: flex-start; gap: 8px; }
.kb-md .kb-task input {
  margin-top: 6px;
  width: 14px; height: 14px;
  accent-color: #4B6EF5;
  flex: none;
}
.kb-md .kb-task input:checked + span { color: #97a1b6; text-decoration: line-through; }

/* ============================ 提示框（callout）：渐变底 + 彩色边 + 悬停 ============================ */
.kb-md .kb-callout {
  position: relative;
  overflow: hidden;
  margin: 14px 0;
  padding: 12px 16px 12px 17px;
  border: 1px solid #e5eaf2;
  border-left: 0;
  border-radius: var(--kb-r);
  background: linear-gradient(180deg, #fbfcff, #f6f8fc);
  box-shadow: var(--kb-shadow);
  transition: transform .18s, box-shadow .18s;
}
.kb-md .kb-callout:hover { transform: translateY(-2px); box-shadow: var(--kb-shadow-hover); }
.kb-md .kb-callout::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, #94a3b8, #cbd5e1);
}
.kb-md .kb-callout-head { display: flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 700; margin-bottom: 7px; }
.kb-md .kb-callout-ico {
  width: 24px; height: 24px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(255, 255, 255, .78);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .9), 0 1px 3px rgba(31, 43, 69, .06);
  font-size: 14px;
  line-height: 1;
}
.kb-md .kb-callout-body > *:first-child { margin-top: 0; }
.kb-md .kb-callout-body > *:last-child { margin-bottom: 0; }

.kb-md .kb-callout-note { background: linear-gradient(180deg, #f4f8ff, #EEF2FF); border-color: #d7e3ff; }
.kb-md .kb-callout-note::before { background: linear-gradient(180deg, #4B6EF5, #7fb0ff); }
.kb-md .kb-callout-note .kb-callout-name { color: #1f4bb8; }
.kb-md .kb-callout-info { background: linear-gradient(180deg, #f2fbff, #e8f7ff); border-color: #cfeaf8; }
.kb-md .kb-callout-info::before { background: linear-gradient(180deg, #0891b2, #67d2e8); }
.kb-md .kb-callout-info .kb-callout-name { color: #0e7490; }
.kb-md .kb-callout-tip { background: linear-gradient(180deg, #f4fdf7, #e9f9ef); border-color: #d3f0de; }
.kb-md .kb-callout-tip::before { background: linear-gradient(180deg, #16a34a, #71d69b); }
.kb-md .kb-callout-tip .kb-callout-name { color: #15803d; }
.kb-md .kb-callout-success { background: linear-gradient(180deg, #f4fdf7, #e8f8ee); border-color: #cdeedb; }
.kb-md .kb-callout-success::before { background: linear-gradient(180deg, #16a34a, #4ade80); }
.kb-md .kb-callout-success .kb-callout-name { color: #15803d; }
.kb-md .kb-callout-important { background: linear-gradient(180deg, #f8f6ff, #f1edff); border-color: #e2dcfd; }
.kb-md .kb-callout-important::before { background: linear-gradient(180deg, #7c3aed, #b79bff); }
.kb-md .kb-callout-important .kb-callout-name { color: #6d28d9; }
.kb-md .kb-callout-warning { background: linear-gradient(180deg, #fffdf6, #fff6e4); border-color: #fbe6bd; }
.kb-md .kb-callout-warning::before { background: linear-gradient(180deg, #f59e0b, #fcd34d); }
.kb-md .kb-callout-warning .kb-callout-name { color: #b45309; }
.kb-md .kb-callout-caution { background: linear-gradient(180deg, #fff8f4, #fff0e6); border-color: #ffdcc8; }
.kb-md .kb-callout-caution::before { background: linear-gradient(180deg, #ea580c, #fdba74); }
.kb-md .kb-callout-caution .kb-callout-name { color: #c2410c; }
.kb-md .kb-callout-danger { background: linear-gradient(180deg, #fff5f6, #ffe9ec); border-color: #ffd4da; }
.kb-md .kb-callout-danger::before { background: linear-gradient(180deg, #e11d48, #fb7185); }
.kb-md .kb-callout-danger .kb-callout-name { color: #be123c; }
.kb-md .kb-callout-question { background: linear-gradient(180deg, #fafbfd, #f2f5fa); border-color: #dfe6f0; }
.kb-md .kb-callout-question::before { background: linear-gradient(180deg, #64748b, #b6c1d2); }
.kb-md .kb-callout-question .kb-callout-name { color: #475569; }
.kb-md .kb-callout-quote { background: linear-gradient(180deg, #fbfcfe, #f5f8fc); border-color: #e6ecf5; }
.kb-md .kb-callout-quote::before { background: linear-gradient(180deg, #94a3b8, #d3dbe8); }
.kb-md .kb-callout-quote .kb-callout-name { color: #55637a; }
.kb-md .kb-callout-example { background: linear-gradient(180deg, #f3fbff, #e9f6fd); border-color: #d3eaf8; }
.kb-md .kb-callout-example::before { background: linear-gradient(180deg, #0ea5e9, #7dd3fc); }
.kb-md .kb-callout-example .kb-callout-name { color: #0369a1; }

/* ============================ 表格：圆角卡片 + 渐变表头 + 斑马纹 ============================ */
.kb-md .kb-table-wrap {
  margin: 15px 0;
  border: 1px solid var(--kb-line);
  border-radius: var(--kb-r);
  overflow: auto;
  background: #fff;
  box-shadow: var(--kb-shadow);
}
.kb-md table { margin: 0; border-collapse: separate; border-spacing: 0; font-size: 13px; }
.kb-md th, .kb-md td { border: 0; border-bottom: 1px solid var(--kb-line-2); padding: 9px 13px; vertical-align: middle; }
.kb-md thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: linear-gradient(180deg, #f8faff, #eef4ff);
  color: #31405c;
  font-weight: 700;
  white-space: nowrap;
  border-bottom: 1px solid #dfe8fa;
}
.kb-md tbody tr:nth-child(even) td { background: #fafcff; }
.kb-md tbody tr { transition: background-color .15s; }
.kb-md tbody tr:hover td { background: #f1f7ff; }
.kb-md tbody tr:last-child td { border-bottom: 0; }

/* ============================ 代码块：圆角 + 按钮胶囊 + 细阴影 ============================ */
.kb-md .kb-code {
  margin: 15px 0;
  border: 1px solid #e3eaf6;
  border-radius: var(--kb-r);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--kb-shadow);
}
.kb-md .kb-code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 13px;
  background: linear-gradient(180deg, #f7faff, #eef3fd);
  border-bottom: 1px solid #e6edfa;
  font-size: 11.5px;
  color: #7b869e;
}
.kb-md .kb-code-lang { font-weight: 700; letter-spacing: .3px; }
.kb-md .kb-code-ops { display: flex; gap: 8px; }
.kb-md .kb-code-btn {
  padding: 2px 10px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid #e1e9f7;
  cursor: pointer;
  color: #5b6579;
  transition: .16s;
}
.kb-md .kb-code-btn:hover { color: var(--kb-brand); border-color: #bcd2ff; background: #f2f7ff; transform: translateY(-1px); }
.kb-md .kb-code pre { margin: 0; padding: 13px 14px; background: #fcfdff; overflow: auto; }
.kb-md .kb-code code { background: none; border: 0; padding: 0; color: #2b3446; font-size: 12.5px; line-height: 1.7; }
.kb-md .kb-code-body { display: flex; gap: 10px; overflow: auto; }
.kb-md .kb-code-ln {
  white-space: pre;
  text-align: right;
  color: #a3aec3;
  user-select: none;
  padding: 13px 10px 13px 12px;
  border-right: 1px solid #eef2f9;
  background: #fbfcff;
  flex: 0 0 auto;
  font-size: 12.5px;
  line-height: 1.7;
}
.kb-md .kb-run-out { border-top: 1px dashed #e2e9f6; background: #fff; }
.kb-md .kb-run-log, .kb-md .kb-run-frame { border-radius: 0 0 var(--kb-r) var(--kb-r); }

/* ============================ 图片 / 媒体 / 附件 ============================ */
.kb-md img.kb-img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 12px 0;
  border-radius: var(--kb-r);
  box-shadow: 0 12px 28px -18px rgba(31, 43, 69, .6);
  transition: transform .25s ease, box-shadow .25s ease;
}
.kb-md img.kb-img:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -18px rgba(31, 43, 69, .6); }
.kb-md .kb-img-center { text-align: center; }
.kb-md .kb-img-center .kb-img { display: inline-block; margin-left: auto; margin-right: auto; }
.kb-md .kb-media audio, .kb-md .kb-media video { width: 100%; border-radius: var(--kb-r); }
.kb-md .kb-attach, .kb-md .kb-preview-card, .kb-md .kb-chart-box, .kb-md .kb-plantuml-box, .kb-md .kb-mermaid {
  border-radius: var(--kb-r);
  box-shadow: var(--kb-shadow);
  transition: transform .18s, box-shadow .18s;
}
.kb-md .kb-chart-box, .kb-md .kb-plantuml-box, .kb-md .kb-mermaid { background: #fff; padding: 12px; }

/* ============================ 视觉块：kpi / cards / steps / timeline ============================ */
.kb-md .kb-vbox { margin: 16px 0; }
.kb-md .kb-vbox-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 11px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .4px;
  color: var(--kb-ink-2);
}
.kb-md .kb-vbox-title::before {
  content: '';
  width: 3px;
  height: 13px;
  border-radius: 2px;
  background: linear-gradient(180deg, #4B6EF5, #7fb0ff);
}
.kb-md .kb-vbox-grid { display: grid; gap: 11px; }
.kb-md .kb-vbox-empty { font-size: 12.5px; color: var(--kb-sub); border: 1px dashed var(--kb-line); border-radius: 10px; padding: 10px 13px; }

/* —— KPI 数据卡片 —— */
.kb-md .kb-vbox-kpi .kb-vbox-grid { grid-template-columns: repeat(auto-fit, minmax(148px, 1fr)); }
.kb-md .kb-kpi {
  position: relative;
  overflow: hidden;
  padding: 14px 15px 13px;
  border: 1px solid var(--kb-line);
  border-radius: var(--kb-r);
  background: linear-gradient(158deg, #ffffff 20%, #f4f8ff);
  box-shadow: var(--kb-shadow);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.kb-md .kb-kpi::after {
  content: '';
  position: absolute;
  right: -26px; top: -26px;
  width: 68px; height: 68px;
  border-radius: 50%;
  background: radial-gradient(circle, #dde9ff, rgba(221, 233, 255, 0));
}
.kb-md .kb-kpi:hover { transform: translateY(-3px); border-color: #cddcff; box-shadow: var(--kb-shadow-hover); }
.kb-md .kb-kpi-ico { font-size: 17px; line-height: 1; margin-bottom: 6px; }
.kb-md .kb-kpi-num {
  font-size: 26px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.5px;
  background: linear-gradient(120deg, #4B6EF5, #12a7c7);
  -webkit-background-clip: text;
  background-clip: text;
  color: #4B6EF5;
  -webkit-text-fill-color: transparent;
}
.kb-md .kb-kpi-label { font-size: 13px; font-weight: 600; color: var(--kb-ink-2); margin-top: 2px; }
.kb-md .kb-kpi-sub { font-size: 11.5px; color: var(--kb-sub); margin-top: 3px; line-height: 1.6; }

/* —— 卡片栅格 —— */
.kb-md .kb-vbox-cards .kb-vbox-grid { grid-template-columns: repeat(auto-fit, minmax(212px, 1fr)); }
.kb-md .kb-card {
  display: flex;
  gap: 11px;
  padding: 13px 14px;
  border: 1px solid var(--kb-line);
  border-radius: var(--kb-r);
  background: #fff;
  box-shadow: var(--kb-shadow);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.kb-md .kb-card:hover { transform: translateY(-3px); border-color: #cddcff; box-shadow: var(--kb-shadow-hover); }
.kb-md .kb-card-ico {
  flex: none;
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  font-size: 18px;
  line-height: 1;
  background: linear-gradient(155deg, #eef4ff, #dfe9ff);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .9);
}
.kb-md .kb-card-main { min-width: 0; }
.kb-md .kb-card-title { font-size: 14px; font-weight: 700; }
.kb-md .kb-card-desc { font-size: 12.5px; line-height: 1.7; color: var(--kb-sub); margin-top: 3px; }

/* —— 步骤条 —— */
.kb-md .kb-vbox-steps .kb-vbox-grid { grid-template-columns: 1fr; gap: 0; }
.kb-md .kb-step { position: relative; display: flex; gap: 12px; padding-bottom: 16px; }
.kb-md .kb-step:last-child { padding-bottom: 0; }
.kb-md .kb-step::before {
  content: '';
  position: absolute;
  left: 13px; top: 30px; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, #dbe7ff, #eef3ff);
}
.kb-md .kb-step:last-child::before { display: none; }
.kb-md .kb-step-no {
  position: relative;
  z-index: 1;
  flex: none;
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 12.5px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(140deg, #4B6EF5, #5b9bff);
  box-shadow: 0 7px 14px -8px rgba(75, 110, 245, .85);
}
.kb-md .kb-step-main { padding-top: 2px; }
.kb-md .kb-step-title { font-size: 13.5px; font-weight: 700; }
.kb-md .kb-step-desc { font-size: 12.5px; line-height: 1.7; color: var(--kb-sub); margin-top: 3px; }

/* —— 时间线 —— */
.kb-md .kb-vbox-timeline .kb-vbox-grid { grid-template-columns: 1fr; gap: 0; }
.kb-md .kb-tl-item { display: flex; gap: 12px; }
.kb-md .kb-tl-time {
  flex: none;
  width: 92px;
  padding-top: 2px;
  text-align: right;
  font-size: 12px;
  font-weight: 700;
  color: var(--kb-brand);
}
.kb-md .kb-tl-main { position: relative; flex: 1; min-width: 0; padding: 0 0 15px 17px; }
.kb-md .kb-tl-main::before {
  content: '';
  position: absolute;
  left: 3px; top: 7px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #fff;
  border: 2.5px solid var(--kb-brand);
  box-shadow: 0 0 0 3px #EEF2FF;
}
.kb-md .kb-tl-main::after {
  content: '';
  position: absolute;
  left: 7px; top: 21px; bottom: 0;
  width: 1.5px;
  background: linear-gradient(180deg, #dbe7ff, #f2f6ff);
}
.kb-md .kb-tl-item:last-child .kb-tl-main { padding-bottom: 0; }
.kb-md .kb-tl-item:last-child .kb-tl-main::after { display: none; }
.kb-md .kb-tl-title { font-size: 13.5px; font-weight: 700; }
.kb-md .kb-tl-desc { font-size: 12.5px; line-height: 1.7; color: var(--kb-sub); margin-top: 3px; }

/* ============================ 脚注 ============================ */
.kb-md .kb-footnotes { margin-top: 24px; border-top: 1px solid var(--kb-line-2); padding-top: 10px; font-size: 12.5px; color: var(--kb-sub); }
.kb-md .kb-fn-title { font-weight: 700; color: var(--kb-ink-2); margin-bottom: 5px; }
.kb-md .kb-fn-ref a { background: #eef3ff; color: var(--kb-brand); border-radius: 5px; padding: 0 5px; font-size: 11px; border-bottom: 0; }

/* ============================ 入场动效（卡片逐个淡入上浮） ============================ */
@keyframes kbFadeUp {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: none; }
}
.kb-md .kb-kpi, .kb-md .kb-card, .kb-md .kb-step, .kb-md .kb-tl-item { animation: kbFadeUp .34s ease both; }
.kb-md .kb-vbox-grid > *:nth-child(2) { animation-delay: .05s; }
.kb-md .kb-vbox-grid > *:nth-child(3) { animation-delay: .1s; }
.kb-md .kb-vbox-grid > *:nth-child(4) { animation-delay: .15s; }
.kb-md .kb-vbox-grid > *:nth-child(5) { animation-delay: .2s; }
.kb-md .kb-vbox-grid > *:nth-child(6) { animation-delay: .25s; }
@media (prefers-reduced-motion: reduce) {
  .kb-md .kb-kpi, .kb-md .kb-card, .kb-md .kb-step, .kb-md .kb-tl-item { animation: none; }
  .kb-md .kb-kpi:hover, .kb-md .kb-card:hover, .kb-md .kb-callout:hover, .kb-md img.kb-img:hover { transform: none; }
}

/* ============================ 窄屏适配 ============================ */
@media (max-width: 560px) {
  .kb-md h1 { font-size: 20px; }
  .kb-md h2 { font-size: 17px; }
  .kb-md .kb-vbox-kpi .kb-vbox-grid { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
  .kb-md .kb-tl-time { width: 68px; }
}

/* ============================ 打印：去掉动效与装饰阴影 ============================ */
@media print {
  .kb-md .kb-code-btn, .kb-md .kb-attach-ops { display: none; }
  .kb-md .kb-kpi, .kb-md .kb-card, .kb-md .kb-callout, .kb-md .kb-code, .kb-md .kb-table-wrap { box-shadow: none; }
}