:root {
  --bg: #f5f5f7;
  --panel: #ffffff;
  --ink: #1d1d1f;
  --ink-2: #4a4a4f;
  --ink-3: #86868b;
  --line: #d2d2d7;
  --line-soft: #e8e8ed;
  --accent: #0071e3;
  --c-case: #0071e3;
  --c-statute: #6e56cf;
  --c-paper: #c2410c;
  --radius: 14px;
  --topbar-h: 48px;
  --picker-h: 46px;
  --gutter: 22px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; height: 100%;
  background: var(--bg); color: var(--ink);
  font: 14.5px/1.68 -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Text",
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ------------------------------------------------------------------ 顶栏 */
.topbar {
  height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding: 0 24px;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line-soft);
  position: sticky; top: 0; z-index: 30;
}
.brand { display: flex; align-items: baseline; gap: 14px; min-width: 0; }
.brand-mark {
  font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: #fff; background: linear-gradient(135deg, #1d1d1f, #4a4a4f);
  padding: 4px 10px; border-radius: 7px; white-space: nowrap;
}
.brand h1 { font-size: 16px; font-weight: 600; margin: 0; letter-spacing: -.01em; white-space: nowrap; }
.brand-sub { font-size: 12px; color: var(--ink-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.seg {
  display: inline-flex; background: #e9e9ee; border-radius: 10px; padding: 4px; gap: 3px;
}
.seg button {
  border: 0; background: transparent; color: var(--ink-2);
  font: inherit; font-size: 13.5px; font-weight: 500;
  padding: 6px 15px; border-radius: 8px; cursor: pointer; white-space: nowrap;
  transition: background .16s, color .16s, box-shadow .16s;
}
.seg button:hover { color: var(--ink); }
.seg button.on { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.13); }

button.ghost {
  border: 1px solid var(--line); background: #fff; color: var(--ink-2);
  font: inherit; font-size: 13.5px; padding: 7px 15px; border-radius: 10px; cursor: pointer;
  transition: background .16s, border-color .16s;
}
button.ghost:hover { background: #f0f0f4; }
.chk { font-size: 12.5px; color: var(--ink-3); display: flex; align-items: center; gap: 6px; cursor: pointer; }

/* ------------------------------------------------------------------ 主体 */
.compare {
  height: calc(100vh - var(--topbar-h));
  display: grid; grid-template-columns: minmax(0,1fr) 1px minmax(0,1fr);
  overflow: hidden;
}
.mid-rule { background: var(--line-soft); }

.pane { display: flex; flex-direction: column; min-width: 0; overflow: hidden; }

/* 三级联动检索：类别 → 国家 → 标题 */
.pane-picker {
  height: var(--picker-h); flex-shrink: 0;
  display: flex; align-items: center; gap: 12px;
  padding: 0 var(--gutter); border-bottom: 1px solid var(--line-soft);
  background: var(--panel);
}
.pane-picker select {
  font: inherit; font-size: 13.5px; color: var(--ink);
  border: 1px solid var(--line); background: #fff;
  border-radius: 10px; padding: 8px 12px; max-width: 42%;
  cursor: pointer; min-width: 0;
}
.pane-picker select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.pane-picker .seg button { padding: 6px 13px; font-size: 13.5px; }
button.ghost.sq { padding: 8px 13px; font-size: 15px; line-height: 1; margin-left: auto; }

/* 条目抬头：单行，仅标题 + 类别 + 国家，其余元信息归入总结栏 */
.item-line {
  flex-shrink: 0; height: 44px; display: flex; align-items: center; gap: 16px;
  padding: 0 var(--gutter); border-bottom: 1px solid var(--line-soft);
  border-left: 3px solid var(--accent); background: var(--panel); overflow: hidden;
}
.item-line .ttl {
  flex: 1; min-width: 0; font-size: 14.5px; font-weight: 600; letter-spacing: -.01em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.item-line .chips { margin: 0; flex-shrink: 0; flex-wrap: nowrap; gap: 7px; }
.item-line.empty { border-left-color: var(--line); }
.item-line.empty .ttl { color: var(--ink-3); font-weight: 500; }
.chip {
  font-size: 12px; padding: 3px 11px; border-radius: 20px;
  background: #f0f0f4; color: var(--ink-2); white-space: nowrap;
}
.chip.k { background: rgba(0,113,227,.1); color: var(--accent); font-weight: 600; }
.chip.tag { background: transparent; border: 1px solid var(--line); color: var(--ink-3); }

/* 双窗格 —— 默认【总结收起】，原文独占整栏、开到最大。
   展开后回到镜像：左栏【总结 | 原文】、右栏【原文 | 总结】，原文占 2/3 */
.pane-body {
  flex: 1; min-height: 0; display: grid; gap: 16px;
  padding: 14px var(--gutter) var(--gutter);
  grid-template-columns: minmax(0,1fr);
  grid-template-rows: minmax(0,1fr);
}
.pane[data-side="left"] .pane-body { grid-template-columns: minmax(0,1fr); }

body.show-summary .pane-body { grid-template-columns: minmax(0,2fr) minmax(0,1fr); }
body.show-summary .pane[data-side="left"] .pane-body { grid-template-columns: minmax(0,1fr) minmax(0,2fr); }
body.show-summary .pane[data-side="left"] .viewer  { order: 2; }
body.show-summary .pane[data-side="left"] .summary { order: 1; }

/* 中央留白：两份原文别贴在一起，视线有落点 */
.pane[data-side="left"]  .pane-body { padding-right: 34px; }
.pane[data-side="right"] .pane-body { padding-left: 34px; }

/* 收起时给外侧的竖排拉手留一条窄边，免得拉手压住原文 */
body:not(.show-summary) .pane[data-side="left"]  .pane-body { padding-left: 32px; }
body:not(.show-summary) .pane[data-side="right"] .pane-body { padding-right: 32px; }

/* 上下堆叠：改为按行排布 */
body.layout-stack .pane-body,
body.layout-stack .pane[data-side="left"] .pane-body { grid-template-columns: minmax(0,1fr); }
body.show-summary.layout-stack .pane-body,
body.show-summary.layout-stack .pane[data-side="left"] .pane-body {
  grid-template-columns: minmax(0,1fr);
  grid-template-rows: minmax(0,1.7fr) minmax(0,1fr);
}
body.layout-stack.show-summary .pane[data-side="left"] .viewer  { order: 1; }
body.layout-stack.show-summary .pane[data-side="left"] .summary { order: 2; }

/* 外侧竖排拉手：收起状态下点它即可展开分层总结 */
.pane { position: relative; }
.sum-rail {
  position: absolute; top: 50%; transform: translateY(-50%);
  writing-mode: vertical-rl; letter-spacing: .2em;
  padding: 16px 6px; font: inherit; font-size: 12px; font-weight: 600;
  color: var(--ink-2); background: #fff; border: 1px solid var(--line);
  border-radius: 9px; cursor: pointer; z-index: 6;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
  transition: background .16s, color .16s, border-color .16s;
}
.sum-rail:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.pane[data-side="left"]  .sum-rail { left: 5px; }
.pane[data-side="right"] .sum-rail { right: 5px; }
body.show-summary .sum-rail { display: none; }

.viewer,
.summary {
  min-height: 0; border: 1px solid var(--line-soft); border-radius: var(--radius);
  background: var(--panel); overflow: hidden;
}
.viewer { display: flex; flex-direction: column; }
.summary { display: none; }
body.show-summary .summary { display: block; }

.vtabs {
  flex-shrink: 0; height: 34px; display: flex; align-items: center; gap: 4px;
  padding: 0 10px; border-bottom: 1px solid var(--line-soft); background: #fbfbfd;
}
.vtabs button {
  border: 0; background: transparent; font: inherit; font-size: 12.5px; color: var(--ink-3);
  padding: 4px 10px; border-radius: 7px; cursor: pointer;
}
.vtabs button.on { background: #e9e9ee; color: var(--ink); font-weight: 600; }
.vtabs .spacer { flex: 1; }
.vtabs a { font-size: 12px; color: var(--accent); text-decoration: none; padding: 4px 7px; }
.vtabs a:hover { text-decoration: underline; }

.vframe { flex: 1; min-height: 0; position: relative; background: #f0f0f4; display: flex; flex-direction: column; }
.vframe .notice {
  flex-shrink: 0; display: flex; align-items: center; gap: 14px;
  padding: 11px 18px; font-size: 12.5px; line-height: 1.6;
  background: #fff8e6; color: #7a5c12; border-bottom: 1px solid #f0e0b8;
}
.vframe .notice span { flex: 1; }
.vframe .notice .ghost { flex-shrink: 0; padding: 5px 13px; font-size: 12px; }
.vframe iframe { width: 100%; flex: 1; min-height: 0; border: 0; display: block; }
.vframe .vload {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--ink-3); font-size: 13px; pointer-events: none;
}
.vframe pre {
  flex: 1; margin: 0; overflow: auto; padding: 22px 24px;
  font: 13px/1.85 ui-monospace, "SF Mono", Consolas, monospace;
  white-space: pre-wrap; word-break: break-word; color: var(--ink-2);
  background: #fff;
}
.vframe .empty {
  height: 100%; display: flex; align-items: center; justify-content: center;
  color: var(--ink-3); font-size: 13.5px; text-align: center; padding: 24px;
}

/* PDF.js 渲染区：PDF 画在 canvas 上，绕开浏览器自带的 PDF 插件，
   因此浏览器「总是下载 PDF」的设置不会再把这份原文变成一次下载。 */
.pdfbar {
  flex-shrink: 0; height: 34px; display: flex; align-items: center; gap: 6px;
  padding: 0 10px; border-bottom: 1px solid var(--line-soft); background: #fbfbfd;
}
.pdfbar .spacer { flex: 1; }
.pdfbar button.pb {
  border: 1px solid var(--line); background: #fff; color: var(--ink-2);
  font: inherit; font-size: 13px; line-height: 1; padding: 4px 9px;
  border-radius: 7px; cursor: pointer; transition: background .16s;
}
.pdfbar button.pb:hover { background: #f0f0f4; }
.pdfbar button.pb.wide { padding: 4px 11px; font-size: 12px; }
.pdfbar .pgn { font-size: 12px; color: var(--ink-3); min-width: 48px; text-align: center; }
.pdfbar .pgn b { color: var(--ink); font-weight: 600; }

.pdfdoc {
  flex: 1; min-height: 0; overflow: auto; position: relative;
  background: #e6e6ea; padding: 14px 0 28px;
  display: flex; flex-direction: column; align-items: center; align-items: safe center;
  gap: 12px;
}
.pdfdoc::-webkit-scrollbar { width: 11px; height: 11px; }
.pdfdoc::-webkit-scrollbar-thumb { background: #b9b9c2; border-radius: 6px; border: 3px solid #e6e6ea; }
.pdfpage {
  position: relative; flex-shrink: 0; background: #fff; overflow: hidden;
  box-shadow: 0 1px 5px rgba(0,0,0,.18); border-radius: 2px;
}
.pdfpage canvas { display: block; }
.pdfpage .pgno {
  position: absolute; right: 6px; bottom: 6px; font-size: 11px; color: #8e8e93;
  background: rgba(255,255,255,.85); padding: 1px 7px; border-radius: 6px;
}
.pdfdoc .empty { margin: auto; height: auto; display: block; }

/* 分层总结 */
.summary {
  overflow-y: auto; padding: 22px 22px 56px;
}
.summary::-webkit-scrollbar { width: 11px; }
.summary::-webkit-scrollbar-thumb { background: #c9c9d0; border-radius: 6px; border: 3px solid var(--panel); }
.sum-head {
  display: flex; align-items: center; gap: 10px; margin-bottom: 16px;
  position: sticky; top: -22px; background: var(--panel); padding: 12px 0 10px; z-index: 2;
}
.sum-head h2 { font-size: 12.5px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--ink-3); margin: 0; }
.badge { font-size: 11px; padding: 3px 9px; border-radius: 20px; background: #f0f0f4; color: var(--ink-3); }
.badge.ai { background: rgba(0,113,227,.1); color: var(--accent); }

.layer { border-top: 1px solid var(--line-soft); padding: 18px 0 20px; }
.sum-head + .layer { border-top: 0; padding-top: 2px; }
.layer .lbl {
  font-size: 13.5px; font-weight: 700; color: var(--ink);
  display: flex; align-items: center; gap: 9px; margin-bottom: 10px;
}
.layer .lbl::before { content: ""; width: 3px; height: 15px; border-radius: 2px; background: var(--accent); }
.layer .txt { font-size: 14.5px; line-height: 1.95; color: var(--ink-2); white-space: pre-wrap; }
.layer .txt.empty { color: var(--ink-3); font-style: italic; font-size: 13px; }
.kw { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line-soft); }

.meta-dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; font-size: 13px; margin-top: 4px; }
.meta-dl dt { color: var(--ink-3); white-space: nowrap; }
.meta-dl dd { margin: 0; color: var(--ink-2); word-break: break-word; }

/* 空态 */
.pane.empty-state .pane-body { grid-template-columns: 1fr; }
.pane.empty-state .viewer, .pane.empty-state .summary { display: none; }

/* ================================================================== 共性差异 */
[hidden] { display: none !important; }

.diffview { display: none; }
body.mode-diff .compare { display: none; }
body.mode-diff .only-compare { display: none; }
body.mode-diff .diffview {
  display: flex; flex-direction: column;
  height: calc(100vh - var(--topbar-h)); overflow: hidden;
}

.diff-tabs {
  flex-shrink: 0; display: flex; align-items: center; gap: 20px;
  padding: 13px var(--gutter); border-bottom: 1px solid var(--line-soft); background: var(--panel);
}
.diff-hint { font-size: 12.5px; color: var(--ink-3); line-height: 1.6; }

.diff-panel { flex: 1; min-height: 0; overflow-y: auto; padding: 18px var(--gutter) 60px; }
.diff-panel::-webkit-scrollbar { width: 11px; }
.diff-panel::-webkit-scrollbar-thumb { background: #c9c9d0; border-radius: 6px; border: 3px solid var(--bg); }

.pair-bar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.pair-stat { font-size: 12.5px; color: var(--ink-3); margin-left: auto; font-variant-numeric: tabular-nums; }
.pair-bar select,
.pair-pick select {
  font: inherit; font-size: 13.5px; color: var(--ink);
  border: 1px solid var(--line); background: #fff;
  border-radius: 10px; padding: 8px 12px; cursor: pointer; min-width: 0;
}
.pair-bar select:focus, .pair-pick select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.pair-picks {
  display: grid; grid-template-columns: minmax(0,1fr) auto minmax(0,1fr);
  gap: 16px; align-items: center; margin-bottom: 18px;
}
.pair-pick { display: flex; gap: 10px; min-width: 0; }
.pair-pick select { flex: 1; }
.pair-pick select[data-role="pcountry"] { flex: 0 0 auto; max-width: 45%; }
#btnPairSwap { margin: 0; }

/* 逐维对照表 */
.dimtable { border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--panel); overflow: hidden; }
.dim-head, .dim-row {
  display: grid; grid-template-columns: 168px minmax(0,1fr) 60px minmax(0,1fr);
  gap: 16px; align-items: start;
}
.dim-head {
  padding: 12px 22px; background: #fbfbfd; border-bottom: 1px solid var(--line-soft);
  font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3);
  position: sticky; top: 0; z-index: 3;
}
.dim-head > div:nth-child(3) { text-align: center; }
.dim-row { padding: 15px 22px; border-bottom: 1px solid var(--line-soft); }
.dim-row:last-child { border-bottom: 0; }
.dim-row.diff { background: rgba(194,65,12,.05); }
.dim-name { font-size: 13.5px; font-weight: 600; color: var(--ink); }
.dim-name .auto {
  font-size: 10.5px; font-weight: 500; color: var(--ink-3);
  margin-left: 7px; border: 1px solid var(--line); border-radius: 20px; padding: 1px 7px;
}
.dim-val { font-size: 13.5px; line-height: 1.8; color: var(--ink-2); word-break: break-word; white-space: pre-wrap; }
.dim-row.diff .dim-val { color: var(--ink); }
.dim-val .empty { color: var(--ink-3); font-style: italic; }
.dim-mark { text-align: center; font-size: 11.5px; font-weight: 700; padding-top: 3px; }
.dim-mark.same { color: #b0b0b8; font-weight: 500; }
.dim-mark.diff { color: #c2410c; }
.dimtable > .empty, .diff-panel > .empty {
  padding: 46px 20px; text-align: center; color: var(--ink-3); font-size: 13.5px;
}

/* 全库类案全景 */
.panorama { display: flex; flex-direction: column; gap: 20px; }
.pano-block { border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--panel); padding: 20px 24px 24px; }
.pano-block h3 { margin: 0 0 6px; font-size: 12.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.pano-block .lead { margin: 0 0 16px; font-size: 12.5px; color: var(--ink-3); line-height: 1.7; }

.common-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(214px, 1fr)); gap: 12px; }
.common-card { border: 1px solid var(--line-soft); border-radius: 11px; padding: 13px 16px; background: #fbfbfd; }
.common-card .cf { font-size: 12px; color: var(--ink-3); }
.common-card .cv { font-size: 14.5px; font-weight: 600; margin: 5px 0 8px; color: var(--ink); line-height: 1.5; }
.common-card .cr { font-size: 12px; color: var(--accent); font-weight: 600; font-variant-numeric: tabular-nums; }

ul.split-list { margin: 0; padding-left: 20px; }
ul.split-list li { font-size: 13.5px; line-height: 2; color: var(--ink-2); }
ul.split-list b { color: var(--ink); }

.pano-row { display: grid; grid-template-columns: 168px minmax(0,1fr); gap: 20px; align-items: start; padding: 15px 0; border-top: 1px solid var(--line-soft); }
.pano-row:first-of-type { border-top: 0; padding-top: 4px; }
.pano-name { font-size: 13px; font-weight: 600; color: var(--ink); padding-top: 1px; }
.pano-name .auto {
  font-size: 10.5px; font-weight: 500; color: var(--ink-3);
  margin-left: 7px; border: 1px solid var(--line); border-radius: 20px; padding: 1px 7px;
}
.statbar { display: flex; height: 12px; border-radius: 6px; overflow: hidden; background: #f0f0f4; }
.statbar span { display: block; height: 100%; }
.statlegend { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.statlegend button {
  border: 1px solid var(--line); background: #fff; border-radius: 20px;
  padding: 3px 11px; font: inherit; font-size: 12px; color: var(--ink-2);
  cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
  transition: background .15s, border-color .15s, color .15s;
}
.statlegend button:hover { background: #f0f0f4; }
.statlegend button.on { border-color: var(--accent); color: var(--accent); background: rgba(0,113,227,.07); }
.statlegend button b { font-weight: 700; }
.statlegend .dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.statlegend .vtx { max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.drill { margin-top: 13px; padding: 13px 16px; border-radius: 10px; background: #fbfbfd; border: 1px solid var(--line-soft); }
.drill .dt { font-size: 12px; color: var(--ink-3); margin-bottom: 9px; }
.drill ul { margin: 0; padding-left: 19px; }
.drill li { font-size: 13px; line-height: 1.85; color: var(--ink-2); }

ol.textlist { margin: 0; padding-left: 20px; }
ol.textlist li { font-size: 13px; line-height: 1.85; color: var(--ink-2); word-break: break-word; }
ol.textlist li b { color: var(--accent); font-variant-numeric: tabular-nums; }

/* 窄屏：窗口放不下左右并排时改为上下堆叠 */
@media (max-width: 1024px) {
  .compare { height: auto; grid-template-columns: minmax(0,1fr); grid-template-rows: minmax(0,1fr) 1px minmax(0,1fr); }
  .mid-rule { height: 1px; }
  .pane-body { grid-template-columns: minmax(0,1fr); grid-template-rows: minmax(0,1fr) minmax(0,1fr); }
  .pane[data-side="left"] .pane-body { grid-template-columns: minmax(0,1fr); }
  .pane[data-side="left"] .viewer  { order: 1; }
  .pane[data-side="left"] .summary { order: 2; }
  .topbar { height: auto; flex-wrap: wrap; padding: 14px 20px; gap: 14px; }
  .pane { min-height: 82vh; }
  .item-line .chips { display: none; }
}