国家/城市字号再调大；城市最大距离增至2.5e6

src/scene/CesiumGlobe.js

@@ -555,7 +555,7 @@ export class CesiumGlobe {
         let cname = props.NAME_ZH || props.NAME;
         if (cname === '中华民国') cname = '中国台湾';
         if (cname && props.LABEL_X != null && props.LABEL_Y != null) {
-          const fontSize = areaKm2 > 5e6 ? 26 : areaKm2 > 1.5e6 ? 19 : areaKm2 > 3e5 ? 16 : 14;
+          const fontSize = areaKm2 > 5e6 ? 28 : areaKm2 > 1.5e6 ? 21 : areaKm2 > 3e5 ? 18 : 16;
           countryLabels.add({
             position: Cesium.Cartesian3.fromDegrees(props.LABEL_X, props.LABEL_Y),
             text: cname,
@@ -607,8 +607,8 @@ export class CesiumGlobe {
     const scene = this.viewer.scene;
     const textGold = Cesium.Color.fromCssColorString('#e0c46a');
     const black = Cesium.Color.fromCssColorString('#14100d');
-    const ddc = new Cesium.DistanceDisplayCondition(0, 2e6);
-    const tdc = new Cesium.NearFarScalar(1e6, 1.0, 2e6, 0.0);
+    const ddc = new Cesium.DistanceDisplayCondition(0, 2.5e6);
+    const tdc = new Cesium.NearFarScalar(1.25e6, 1.0, 2.5e6, 0.0);
 
     let cities = [];
     try {
@@ -638,7 +638,7 @@ export class CesiumGlobe {
       labels.add({
         position,
         text: c.name,
-        font: 'bold 15px "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif',
+        font: 'bold 17px "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif',
         fillColor: textGold,
         outlineColor: black,
         outlineWidth: 2,