css problems

otw-sc-tabs i am using this tabs in my website

this is the link http://onworking.equilibrarte.pt and it’s in the link serviços, the main problem

the help document says this
“Custom styling

If you need to further style a tab layout here are your options:

Each tab shortcode has it’s unique CSS class that can be used to style all Tab Layouts- .otw-sc-tabs { }
Create a new class for each instance of a Tab Layouts shortcode in its interface so you can style it individually. For example – .my-tabs-custom-css-class-name { }”

however i can’t even change the things i wanna change, for example, remove the outline of the text, put the tabs transparent and with more padding ..can any1 give me a hand i am kinda going crazy with this things

my tabs are little-tab (the label one) and tabs-1 , tabs-2 and tabs-3 …