.vector-menu-portal { .vector-menu-heading { background-image: linear-gradient( to right, @border-color-portal-heading-transparent 0, @border-color-portal-heading 33%, @border-color-portal-heading 66%, @border-color-portal-heading-transparent 100% ); // Standard (Firefox 16+, IE 10+, Safari 6.1+, Chrome 26+) background-position: center bottom; background-repeat: no-repeat; background-size: 100% @border-width-base; } }