feat: chiefCenter 500px 재구현

- API: 사령턴 관련
- TopBackBar에 갱신 추가

hwe/scss/common/variables.scss

@@ -3,10 +3,13 @@ $base2color: #00582c;
 $base3color: #704615;
 $base4color: #70153b;
 
+$nbase2color: #0c1a41;
+
 $sammoColors: ('base1': $base1color,
     'base2': $base2color,
     'base3': $base3color,
     'base4': $base4color,
+    'nbase2': $nbase2color,
 );
 
 $nationColors: ("000000": #000000,