Menu bottom line

Hello, and happy new year!

I updated Evolve, but now the line under the menu appears in double. Is there something I can do to make it single again? The address is https://www.winebotany.com, and the Additional CSS I have is:

.primary-menu {
width: 985px;
text-align: center;
margin-left: auto;
margin-right: auto;
}

.sf-menu li {
height: 350px;
}

#wrapper .primary-menu .link-effect a {
border-bottom: 2px solid #990000;
}

.hentry {
border-bottom: 2px solid #990000;
}

.content {
padding-top: 0;
}

Many thanks for your help!

The page I need help with: [log in to see the link]