How do I remove the internal border from a table?

I am using the SiteOrigin editor and created a table. I can’t get the borders of the table to display the way I want them to. I want them to be collapsed. 1 pixel border around the cells and not the table. not two. I have used CSS and HTML recommendations from W3 Schools to no avail. It

My code looks like this:

Floor & Wall Characteristics

Antimicrobial
Easy to Clean

Durability
Seemless Flooring

Thermal Shock Resistance
Exceptional Durability/Longevity

Abrasion Resistance
Waterproof/Moisture Mitigation

My CSS looks like this:

td {
padding: 10px;
}
table {
border:1px solid #CCC;
border-collapse:collapse;
}
td {
border:none;
}

table {
border: 0;
}

HELP!!!