1 html { overflow: hidden; }
2 .body { position: absolute; top: 0; right: 0; bottom: 0; left: 0; }
3 .header { height: 62px; position: absolute; top: 0; right: 0; left: 0; }
4 .content { position: absolute; top: 62px; right: 0; bottom: 0; left: 200px; overflow: auto;}