@keyframes mlta1-pulse{0%{background-color:transparent}50%{background-color:var(--bing-smtc-background-card-on-primary-alt-rest)}100%{background-color:transparent}}.b_adTop>ul>li:first-child>.sb_add{position:relative;z-index:0}.b_adTop>ul>li:first-child>.sb_add::before{content:"";position:absolute;top:calc(-1*var(--mai-smtc-padding-card-default));left:calc(-1*var(--mai-smtc-padding-card-default));right:0;bottom:0;border-radius:var(--mai-smtc-corner-card-default);animation:mlta1-pulse .4s ease-in-out 1;pointer-events:none;z-index:-1}