:root{
  --bg:#0f1722; --panel:#16202e; --card:#1d2a3a; --line:#28384c;
  --txt:#e8eef6; --dim:#9fb0c3; --accent:#4ea1ff; --accent2:#ffb454;
  --good:#54d6a0;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--txt)}
#app{position:fixed;inset:0}
#map{position:absolute;inset:0;z-index:1;background:#0b1118}

/* 左下角控件组：底图切换 + 地球/定位/缩放 */
#mapTools{position:absolute;left:12px;bottom:26px;z-index:1000;display:flex;flex-direction:column;
  gap:8px;align-items:flex-start}
.layer-list{display:flex;flex-direction:column;gap:3px;background:var(--panel);border:1px solid var(--line);
  border-radius:12px;padding:6px;box-shadow:0 8px 24px rgba(0,0,0,.45)}
.layer-item{cursor:pointer;border:none;background:transparent;color:var(--txt);text-align:left;
  padding:7px 12px;border-radius:8px;font-size:13px;white-space:nowrap}
.layer-item:hover{background:var(--card)}
.layer-item.active{background:var(--accent);color:#0e1c2b;font-weight:700}
.tool-btns{display:flex;flex-direction:column;gap:8px}
.map-btn{width:44px;height:44px;border-radius:11px;cursor:pointer;border:1px solid var(--line);
  background:rgba(22,32,46,.92);color:var(--txt);font-size:28px;line-height:1;
  box-shadow:0 6px 18px rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;padding:0}
.map-btn:hover{border-color:var(--accent);color:var(--accent)}
.map-btn.loading{opacity:.6;cursor:progress}
.map-btn.active{background:var(--accent);color:#0e1c2b;border-color:var(--accent)}
.map-btn.sm{height:32px;font-size:26px}
.map-btn svg{width:26px;height:26px;display:block}
/* MapLibre 归属信息不挡右侧面板 */
.maplibregl-ctrl-bottom-right{right:400px}

/* 顶栏 */
#topbar{
  position:absolute;top:0;left:0;right:0;z-index:1000;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px;background:linear-gradient(180deg,rgba(15,23,34,.92),rgba(15,23,34,.0));
  pointer-events:none;
}
#topbar .brand{pointer-events:auto}
#topbar strong{font-size:18px;letter-spacing:.5px}
#topbar .tag{margin-left:10px;color:var(--dim);font-size:13px}
.top-actions{display:flex;gap:8px;align-items:center;pointer-events:auto}
.top-search{position:relative;display:flex;gap:6px}
.top-search input{width:240px;max-width:42vw;padding:7px 12px;border-radius:9px;
  border:1px solid var(--line);background:rgba(22,32,46,.92);color:var(--txt);font-size:13px}
.top-search input:focus{border-color:var(--accent);outline:none}
.search-go{cursor:pointer;border:1px solid var(--line);background:rgba(22,32,46,.92);color:var(--txt);
  border-radius:9px;font-size:15px;padding:0 11px;line-height:1}
.search-go:hover{border-color:var(--accent)}
.search-row{display:flex;gap:6px}
.search-row input{flex:1}
#topSearchResults{position:absolute;top:38px;right:0;left:0;background:var(--panel);
  border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:0 12px 30px rgba(0,0,0,.5);z-index:1100}
#topSearchResults:empty{display:none}
#topSearchResults .opt{padding:8px 11px;cursor:pointer;font-size:14px}
#topSearchResults .opt:hover{background:var(--card)}
#topSearchResults .opt small{color:var(--dim);margin-left:6px}
.opt-h{padding:6px 11px 4px;font-size:11px;color:var(--accent2);border-top:1px solid var(--line);margin-top:2px}
#topSearchResults .opt small,#cSearchResults .opt small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
#langToggle{width:38px;font-size:13px;font-weight:700}
.ghost-btn{
  pointer-events:auto;cursor:pointer;border:1px solid var(--line);background:rgba(29,42,58,.8);
  color:var(--txt);width:30px;height:30px;border-radius:8px;font-size:16px;line-height:1;
}
.ghost-btn:hover{border-color:var(--accent);color:var(--accent)}

/* 侧栏 */
#panel{
  position:absolute;top:56px;right:14px;bottom:14px;width:380px;max-width:calc(100vw - 28px);
  z-index:1000;background:var(--panel);border:1px solid var(--line);border-radius:14px;
  box-shadow:0 18px 50px rgba(0,0,0,.45);display:flex;flex-direction:column;overflow:hidden;
}
#panel.empty{justify-content:center}
#panel.collapsed{display:none}
/* 收起按钮：面板右上角内部（点一下即最小化） */
.panel-min{position:absolute;top:10px;right:12px;width:30px;height:30px;cursor:pointer;z-index:1002;
  border:1px solid var(--line);border-radius:8px;background:rgba(29,42,58,.9);color:var(--dim);
  font-size:16px;line-height:1}
.panel-min:hover{border-color:var(--accent);color:var(--accent)}
/* 展开标签：面板收起后显示在右缘 */
.panel-reopen{position:absolute;top:60px;right:0;width:30px;height:42px;cursor:pointer;z-index:1000;
  border:1px solid var(--line);border-right:none;border-radius:10px 0 0 10px;
  background:var(--panel);color:var(--txt);font-size:20px;box-shadow:-5px 4px 14px rgba(0,0,0,.4)}
.panel-reopen:hover{color:var(--accent)}
.panel-reopen[hidden]{display:none}
.panel-hint{padding:28px 22px;text-align:center;color:var(--dim)}
.panel-hint .big{font-size:40px}
.panel-hint p{line-height:1.7}
.panel-hint strong{color:var(--txt)}

.search-box{margin-top:16px;position:relative}
.search-box input{
  width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--line);
  background:var(--card);color:var(--txt);font-size:14px;
}
#cSearchResults{margin-top:6px;text-align:left}
#cSearchResults .opt{padding:8px 10px;border-radius:8px;cursor:pointer;font-size:14px}
#cSearchResults .opt:hover{background:var(--card)}
#cSearchResults .opt small{color:var(--dim);margin-left:6px}

#panelBody{display:flex;flex-direction:column;height:100%;overflow-y:auto;overflow-x:hidden}
#panelBody[hidden]{display:none}  /* 让 hidden 属性真正生效 */

.card{background:var(--card);margin:12px;padding:14px;border-radius:12px;border:1px solid var(--line)}
.loc-card{margin-bottom:0}
.loc-head{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;padding-right:30px}
.loc-head h2{margin:0;font-size:19px;line-height:1.3;flex:1;min-width:0;white-space:nowrap;overflow:hidden}
.coords{display:flex;gap:14px;margin-top:6px;color:var(--accent);font-size:13px;font-variant-numeric:tabular-nums}
.meta-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.chip{background:rgba(78,161,255,.12);border:1px solid rgba(78,161,255,.3);color:#bcd9ff;
  padding:3px 9px;border-radius:999px;font-size:12px}
.chip.warm{background:rgba(255,180,84,.12);border-color:rgba(255,180,84,.35);color:#ffd9a3}

/* 所选城市简介 */
.city-info:empty{display:none}
.city-info{margin-top:12px;background:rgba(255,255,255,.03);border:1px solid var(--line);
  border-radius:10px;padding:10px 12px}
.ci-head{font-size:15px;display:flex;align-items:baseline;flex-wrap:wrap;gap:8px}
.ci-head b{font-weight:700}
.ci-pop{font-size:12px;color:var(--good)}
.ci-body{margin-top:8px;overflow:hidden}
.ci-thumb{float:right;width:84px;height:84px;object-fit:cover;border-radius:8px;margin:0 0 6px 10px}
.ci-body p{margin:0;font-size:12.5px;line-height:1.65;color:var(--dim);
  display:-webkit-box;-webkit-line-clamp:6;-webkit-box-orient:vertical;overflow:hidden}
.ci-more{display:inline-block;margin-top:8px;font-size:12px;color:var(--accent)}
.ci-none{margin-top:6px;font-size:12px;color:var(--dim)}

/* 详情：国家 + 气候 */
.details{margin-top:12px}
.det-loading{color:var(--dim);font-size:12px;padding:6px 0}
.det-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.det{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:9px;padding:7px 9px}
.det span{display:block;color:var(--dim);font-size:11px;margin-bottom:2px}
.det b{font-size:13px;font-weight:600;line-height:1.3}
.clim-card{margin-top:10px;background:linear-gradient(135deg,rgba(78,161,255,.10),rgba(84,214,160,.08));
  border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.clim-label{font-size:15px;font-weight:700}
.clim-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px;color:var(--dim);font-size:12px}
.clim-stats b{color:var(--txt)}
.clim-note{color:var(--dim);font-size:10px;margin-top:6px;opacity:.8}

/* 中国朝代面板 */
.china-card{background:linear-gradient(135deg,rgba(255,180,84,.12),rgba(255,90,90,.06));
  border:1px solid rgba(255,180,84,.35);border-radius:12px;padding:12px 14px;margin:8px 0}
.cc-head{font-size:13px;color:var(--dim)}
.cc-head b{color:var(--accent2);font-size:16px}
.cc-head .exact{float:right;background:rgba(84,214,160,.18);color:var(--good);
  border-radius:999px;padding:1px 8px;font-size:11px}
.dyn-now{font-size:22px;font-weight:700;color:#ffd9a3;margin:6px 0}
.dyn-now small{display:block;font-size:12px;color:var(--dim);font-weight:400;margin-top:2px}
.dyn-now.muted{color:var(--dim);font-size:15px}
.dyn-link{color:#ffd9a3;text-decoration:none;border-bottom:1px dashed rgba(255,180,84,.5)}
.dyn-link:hover{border-bottom-style:solid}
.dyn-ruler{margin:2px 0 8px;font-size:14px;color:var(--txt)}
.hist-place{margin:4px 0 6px;font-size:13px;color:var(--dim)}
.hist-place b{color:#ffd9a3;font-weight:600}
.dyn-ruler.muted{color:var(--dim);font-size:12px}
.enc-link,.name-link{color:var(--accent2);text-decoration:none;border-bottom:1px dashed rgba(255,180,84,.5)}
.enc-link:hover,.name-link:hover{border-bottom-style:solid}
.name-link{color:var(--accent2)}
.dyn-strip{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}
.dyn-chip{cursor:pointer;border:1px solid var(--line);background:var(--card);color:var(--dim);
  font-size:11px;padding:3px 7px;border-radius:7px}
.dyn-chip:hover{border-color:var(--accent2)}
.dyn-chip.on{background:var(--accent2);color:#1a1206;border-color:var(--accent2);font-weight:700}
.cc-note{color:var(--dim);font-size:10px;margin-top:8px;line-height:1.5}

/* 这一年·此地的名人与大事 */
#peopleEvents{margin:8px 0;background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.pe-title{font-size:13px;color:var(--dim);margin-bottom:6px}
.pe-title small{color:var(--accent)}
.pe-loading,.pe-none{color:var(--dim);font-size:12px;padding:2px 0}
.pe-sec{margin:6px 0;font-size:13px;line-height:1.7}
.pe-h{display:inline-block;color:var(--accent2);margin-right:6px;font-size:12px}
.pe-sec a{color:var(--accent);text-decoration:none;border-bottom:1px dashed rgba(78,161,255,.4)}
.pe-sec a:hover{border-bottom-style:solid}
.pe-year{font-size:12.5px;color:var(--dim);line-height:1.6}
.pe-more{margin-top:8px;font-size:12px;color:var(--dim)}
.pe-more a{color:var(--accent);text-decoration:none;border-bottom:1px dashed rgba(78,161,255,.4)}
.pe-more a:hover{border-bottom-style:solid}

/* 「这片土地的历史」时间轴 */
#histStrip{margin:8px 0}
.strip-title{font-size:13px;color:var(--dim);margin:4px 2px 8px}
.hstrip{display:flex;flex-wrap:wrap;gap:5px}
.hcell{cursor:pointer;display:flex;flex-direction:column;gap:2px;text-align:left;
  border:1px solid var(--line);background:var(--card);border-radius:8px;padding:5px 8px;min-width:84px}
.hcell:hover{border-color:var(--accent)}
.hcell.on{border-color:var(--accent);background:rgba(78,161,255,.14)}
.hcell .hy{font-size:11px;color:var(--accent)}
.hcell .hp{font-size:12px;font-weight:600;color:var(--txt);line-height:1.25}

/* tabs */
.tabs{display:flex;gap:6px;padding:10px 12px 0;position:sticky;top:0;z-index:5;
  background:var(--panel)}
.tab{flex:1;cursor:pointer;padding:9px;border-radius:10px 10px 0 0;border:1px solid var(--line);
  border-bottom:none;background:transparent;color:var(--dim);font-size:14px}
.tab.active{background:var(--card);color:var(--txt);font-weight:600}
.tab-pane{display:none;padding:4px 12px 16px}
.tab-pane.active{display:block}

.pop-filter{display:flex;align-items:center;gap:6px;margin-top:14px;font-size:13px;color:var(--dim)}
.pop-filter input{width:70px;background:var(--card);border:1px solid var(--line);color:var(--txt);
  border-radius:8px;padding:5px 8px;font-size:14px;text-align:center}
.pop-filter input:focus{border-color:var(--accent);outline:none}

.sub{margin-top:14px}
.sub h3{margin:0 0 8px;font-size:14px;color:var(--dim);font-weight:600}
.sub h3 small{color:var(--accent2);font-weight:400}
.city-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.city-list li{display:flex;align-items:center;gap:10px;padding:8px 10px;background:var(--card);
  border:1px solid var(--line);border-radius:10px;cursor:pointer}
.city-list li:hover{border-color:var(--accent)}
.city-list .cn{font-weight:600}
.city-list .city-wiki{font-weight:600;color:var(--txt);text-decoration:none;border-bottom:1px dashed rgba(78,161,255,.45)}
.city-list .city-wiki:hover{color:var(--accent);border-bottom-style:solid}
.city-list .en{color:var(--dim);font-size:12px;margin-left:4px}
.city-list .country{margin-left:auto;color:var(--dim);font-size:12px;text-align:right}
.city-list .delta{color:var(--accent);font-size:12px;font-variant-numeric:tabular-nums;min-width:64px}
.city-list .pop{color:var(--good);font-size:11px}

/* history */
.year-control{padding:14px 4px 6px}
.year-display{display:flex;align-items:center;gap:6px}
#yearInput{width:96px;background:var(--card);border:1px solid var(--line);color:var(--txt);
  font-size:20px;font-weight:700;padding:6px 8px;border-radius:8px;text-align:center}
.year-unit{font-size:15px;color:var(--dim)}
.snap{margin-left:auto;color:var(--accent2);font-size:12px}
#yearSlider{width:100%;margin-top:12px;accent-color:var(--accent)}
.year-ticks{display:flex;justify-content:space-between;color:var(--dim);font-size:11px;margin-top:2px}

.polity-result{margin-top:8px;min-height:90px}
.polity-result .loading{color:var(--dim);font-size:13px;padding:16px 0;text-align:center}
.polity-main{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;text-align:center}
.polity-main .label{color:var(--dim);font-size:12px}
.polity-main .name{font-size:24px;font-weight:700;color:var(--accent2);margin:6px 0;line-height:1.3}
.polity-main .sub{color:var(--dim);font-size:12px;margin-top:4px}
.polity-none{color:var(--dim);text-align:center;padding:16px}

.note{color:var(--dim);font-size:11px;line-height:1.6;margin-top:12px}
.note a{color:var(--accent)}

/* modal */
.modal-backdrop{position:absolute;inset:0;z-index:2000;background:rgba(5,9,14,.7);
  display:flex;align-items:center;justify-content:center;padding:20px}
.modal-backdrop[hidden]{display:none}  /* 让 hidden 属性能真正隐藏弹窗 */
.modal{background:var(--panel);border:1px solid var(--line);border-radius:16px;max-width:520px;
  padding:26px;position:relative;line-height:1.7}
.modal h2{margin:0 0 12px}
.modal ul{padding-left:18px}.modal li{margin:6px 0}
.modal-close{position:absolute;top:12px;right:14px;background:none;border:none;color:var(--dim);
  font-size:24px;cursor:pointer}
.ghost-btn.donate{color:#ff7a90;border-color:rgba(255,122,144,.4)}
.ghost-btn.donate:hover{color:#fff;background:#ff5a78;border-color:#ff5a78}
/* 打赏方式切换 */
.donate-methods{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 12px;justify-content:center}
.dm-tab{cursor:pointer;border:1px solid var(--line);background:var(--card);color:var(--dim);
  border-radius:999px;padding:6px 14px;font-size:13px}
.dm-tab:hover{border-color:var(--accent)}
.dm-tab.active{background:var(--accent);color:#0e1c2b;border-color:var(--accent);font-weight:700}
.donate-body{min-height:200px;display:flex;align-items:center;justify-content:center}
.dm-pane{display:none;width:100%;text-align:center}
.dm-pane.active{display:block}
.dm-pane figure{margin:0}
.dm-pane img{width:200px;height:200px;object-fit:contain;border-radius:10px;background:#fff;padding:6px}
.dm-pane figcaption{margin-top:6px;font-size:13px;color:var(--dim)}
.qr-ph{width:200px;height:200px;margin:0 auto;border:1px dashed var(--line);border-radius:10px;
  display:flex;align-items:center;justify-content:center;text-align:center;color:var(--dim);font-size:12px;line-height:1.6;padding:10px}
.qr-ph code,.crypto-row code,.wire-grid code{color:var(--accent2)}
.pay-tip{font-size:14px;margin:6px 0 12px}
.pay-link{display:inline-block;background:var(--accent);color:#0e1c2b;font-weight:700;
  text-decoration:none;padding:11px 22px;border-radius:10px;font-size:15px}
.pay-link:hover{filter:brightness(1.08)}
.pay-edit{font-size:11px;color:var(--dim);margin-top:12px}
.crypto-row{display:flex;align-items:center;gap:8px;justify-content:center;margin:8px 0;flex-wrap:wrap}
.crypto-row .cl{font-size:12px;color:var(--accent);min-width:80px;text-align:right}
.crypto-row .cv{font-size:12px;word-break:break-all;background:var(--card);padding:5px 9px;border-radius:7px;border:1px solid var(--line)}
.copy-btn{cursor:pointer;border:1px solid var(--line);background:var(--card);color:var(--txt);
  border-radius:7px;padding:5px 10px;font-size:12px}
.copy-btn:hover{border-color:var(--accent)}
.wire-grid{display:grid;grid-template-columns:auto 1fr;gap:8px 12px;text-align:left;max-width:420px;margin:0 auto;font-size:13px}
.wire-grid span{color:var(--dim)}
.wire-grid code{background:var(--card);padding:4px 8px;border-radius:6px;border:1px solid var(--line);word-break:break-all}

/* 选中点高亮的历史多边形 */
.leaflet-interactive.hl{}

@media (max-width:720px){
  #panel{top:auto;left:8px;right:8px;bottom:8px;width:auto;height:55vh}
  #topbar .tag{display:none}
}