Problem with Page Title

in custom-fun-box.css

this code:

.top .bottom{
width: 100%;
height: 400px;

automatically change in:

.top, .bottom{
width: 100%;
height: 400px;;

the result is this page
http://www.embroideryservice.it/?portfolio=carta-transfer-a-sublimazione-105-gr-mq

can you help me?

https://ww.wp.xz.cn/plugins/wp-visual-slidebox-builder/